[OE-core] [PATCH 12/14] bind: update 9.11.5-P4 -> 9.11.13
akuster808
akuster808 at gmail.com
Wed Nov 27 20:25:23 UTC 2019
On 11/27/19 8:40 AM, Alexander Kanavin wrote:
> Drop backports.
>
> Drop 0001-gen.c-extend-DIRNAMESIZE-from-256-to-512.patch and
> 0001-lib-dns-gen.c-fix-too-long-error.patch as problem is fixed
Bug fix only?
-armin
> upstream.
>
> Signed-off-by: Alexander Kanavin <alex.kanavin at gmail.com>
> ---
> .../bind/0001-bind-fix-CVE-2019-6471.patch | 64 --
> ....in-remove-useless-L-use_openssl-lib.patch | 18 +-
> ...01-fix-enforcement-of-tcp-clients-v1.patch | 60 --
> ...c-extend-DIRNAMESIZE-from-256-to-512.patch | 22 -
> ...001-lib-dns-gen.c-fix-too-long-error.patch | 31 -
> ...p-clients-could-still-be-exceeded-v2.patch | 670 -------------
> ...rence-counter-for-pipeline-groups-v3.patch | 278 ------
> ...accounting-and-client-mortality-chec.patch | 512 ----------
> ...a-and-pipeline-refs-allow-special-ca.patch | 911 ------------------
> ...allowance-for-tcp-clients-interfaces.patch | 80 --
> ...perations-in-bin-named-client.c-with.patch | 140 ---
> ...ching-for-json-headers-searches-sysr.patch | 15 +-
> .../{bind_9.11.5-P4.bb => bind_9.11.13.bb} | 18 +-
> 13 files changed, 20 insertions(+), 2799 deletions(-)
> delete mode 100644 meta/recipes-connectivity/bind/bind/0001-bind-fix-CVE-2019-6471.patch
> delete mode 100644 meta/recipes-connectivity/bind/bind/0001-fix-enforcement-of-tcp-clients-v1.patch
> delete mode 100644 meta/recipes-connectivity/bind/bind/0001-gen.c-extend-DIRNAMESIZE-from-256-to-512.patch
> delete mode 100644 meta/recipes-connectivity/bind/bind/0001-lib-dns-gen.c-fix-too-long-error.patch
> delete mode 100644 meta/recipes-connectivity/bind/bind/0002-tcp-clients-could-still-be-exceeded-v2.patch
> delete mode 100644 meta/recipes-connectivity/bind/bind/0003-use-reference-counter-for-pipeline-groups-v3.patch
> delete mode 100644 meta/recipes-connectivity/bind/bind/0004-better-tcpquota-accounting-and-client-mortality-chec.patch
> delete mode 100644 meta/recipes-connectivity/bind/bind/0005-refactor-tcpquota-and-pipeline-refs-allow-special-ca.patch
> delete mode 100644 meta/recipes-connectivity/bind/bind/0006-restore-allowance-for-tcp-clients-interfaces.patch
> delete mode 100644 meta/recipes-connectivity/bind/bind/0007-Replace-atomic-operations-in-bin-named-client.c-with.patch
> rename meta/recipes-connectivity/bind/{bind_9.11.5-P4.bb => bind_9.11.13.bb} (86%)
>
> diff --git a/meta/recipes-connectivity/bind/bind/0001-bind-fix-CVE-2019-6471.patch b/meta/recipes-connectivity/bind/bind/0001-bind-fix-CVE-2019-6471.patch
> deleted file mode 100644
> index 2fed99e1bba..00000000000
> --- a/meta/recipes-connectivity/bind/bind/0001-bind-fix-CVE-2019-6471.patch
> +++ /dev/null
> @@ -1,64 +0,0 @@
> -Backport patch to fix CVE-2019-6471.
> -
> -Ref:
> -https://security-tracker.debian.org/tracker/CVE-2019-6471
> -
> -CVE: CVE-2019-6471
> -Upstream-Status: Backport [https://gitlab.isc.org/isc-projects/bind9/commit/3a9c7bb]
> -
> -Signed-off-by: Kai Kang <kai.kang at windriver.com>
> -
> -From 3a9c7bb80d4a609b86427406d9dd783199920b5b Mon Sep 17 00:00:00 2001
> -From: Mark Andrews <marka at isc.org>
> -Date: Tue, 19 Mar 2019 14:14:21 +1100
> -Subject: [PATCH] move item_out test inside lock in dns_dispatch_getnext()
> -
> -(cherry picked from commit 60c42f849d520564ed42e5ed0ba46b4b69c07712)
> ----
> - lib/dns/dispatch.c | 12 ++++++++----
> - 1 file changed, 8 insertions(+), 4 deletions(-)
> -
> -diff --git a/lib/dns/dispatch.c b/lib/dns/dispatch.c
> -index 408beda367..3278db4a07 100644
> ---- a/lib/dns/dispatch.c
> -+++ b/lib/dns/dispatch.c
> -@@ -134,7 +134,7 @@ struct dns_dispentry {
> - isc_task_t *task;
> - isc_taskaction_t action;
> - void *arg;
> -- bool item_out;
> -+ bool item_out;
> - dispsocket_t *dispsocket;
> - ISC_LIST(dns_dispatchevent_t) items;
> - ISC_LINK(dns_dispentry_t) link;
> -@@ -3422,13 +3422,14 @@ dns_dispatch_getnext(dns_dispentry_t *resp, dns_dispatchevent_t **sockevent) {
> - disp = resp->disp;
> - REQUIRE(VALID_DISPATCH(disp));
> -
> -- REQUIRE(resp->item_out == true);
> -- resp->item_out = false;
> --
> - ev = *sockevent;
> - *sockevent = NULL;
> -
> - LOCK(&disp->lock);
> -+
> -+ REQUIRE(resp->item_out == true);
> -+ resp->item_out = false;
> -+
> - if (ev->buffer.base != NULL)
> - free_buffer(disp, ev->buffer.base, ev->buffer.length);
> - free_devent(disp, ev);
> -@@ -3573,6 +3574,9 @@ dns_dispatch_removeresponse(dns_dispentry_t **resp,
> - isc_task_send(disp->task[0], &disp->ctlevent);
> - }
> -
> -+/*
> -+ * disp must be locked.
> -+ */
> - static void
> - do_cancel(dns_dispatch_t *disp) {
> - dns_dispatchevent_t *ev;
> ---
> -2.20.1
> -
> diff --git a/meta/recipes-connectivity/bind/bind/0001-configure.in-remove-useless-L-use_openssl-lib.patch b/meta/recipes-connectivity/bind/bind/0001-configure.in-remove-useless-L-use_openssl-lib.patch
> index 871bb2a5f6c..9d31b980807 100644
> --- a/meta/recipes-connectivity/bind/bind/0001-configure.in-remove-useless-L-use_openssl-lib.patch
> +++ b/meta/recipes-connectivity/bind/bind/0001-configure.in-remove-useless-L-use_openssl-lib.patch
> @@ -1,4 +1,4 @@
> -From 950867d9fd3f690e271c8c807b6eed144b2935b2 Mon Sep 17 00:00:00 2001
> +From 2325a92f1896a2a7f586611686801b41fbc91b50 Mon Sep 17 00:00:00 2001
> From: Hongxu Jia <hongxu.jia at windriver.com>
> Date: Mon, 27 Aug 2018 15:00:51 +0800
> Subject: [PATCH] configure.in: remove useless `-L$use_openssl/lib'
> @@ -10,15 +10,16 @@ and helpful for clean up host build path in isc-config.sh
> Upstream-Status: Inappropriate [oe-core specific]
>
> Signed-off-by: Hongxu Jia <hongxu.jia at windriver.com>
> +
> ---
> - configure.in | 2 +-
> + configure.ac | 2 +-
> 1 file changed, 1 insertion(+), 1 deletion(-)
>
> -diff --git a/configure.in b/configure.in
> -index 54efc55..76ac0eb 100644
> ---- a/configure.in
> -+++ b/configure.in
> -@@ -1691,7 +1691,7 @@ If you don't want OpenSSL, use --without-openssl])
> +diff --git a/configure.ac b/configure.ac
> +index e85a5c6..2bbfc58 100644
> +--- a/configure.ac
> ++++ b/configure.ac
> +@@ -1631,7 +1631,7 @@ If you don't want OpenSSL, use --without-openssl])
> fi
> ;;
> *)
> @@ -27,6 +28,3 @@ index 54efc55..76ac0eb 100644
> ;;
> esac
> fi
> ---
> -2.7.4
> -
> diff --git a/meta/recipes-connectivity/bind/bind/0001-fix-enforcement-of-tcp-clients-v1.patch b/meta/recipes-connectivity/bind/bind/0001-fix-enforcement-of-tcp-clients-v1.patch
> deleted file mode 100644
> index 48ae125f845..00000000000
> --- a/meta/recipes-connectivity/bind/bind/0001-fix-enforcement-of-tcp-clients-v1.patch
> +++ /dev/null
> @@ -1,60 +0,0 @@
> -Backport patch to fix CVE-2018-5743.
> -
> -Ref:
> -https://security-tracker.debian.org/tracker/CVE-2018-5743
> -
> -CVE: CVE-2018-5743
> -Upstream-Status: Backport [https://gitlab.isc.org/isc-projects/bind9/commit/ec2d50d]
> -
> -Signed-off-by: Kai Kang <kai.kang at windriver.com>
> -
> -From ec2d50da8d81814640e28593d912f4b96c7efece Mon Sep 17 00:00:00 2001
> -From: =?UTF-8?q?Witold=20Kr=C4=99cicki?= <wpk at isc.org>
> -Date: Thu, 3 Jan 2019 14:17:43 +0100
> -Subject: [PATCH 1/6] fix enforcement of tcp-clients (v1)
> -
> -tcp-clients settings could be exceeded in some cases by
> -creating more and more active TCP clients that are over
> -the set quota limit, which in the end could lead to a
> -DoS attack by e.g. exhaustion of file descriptors.
> -
> -If TCP client we're closing went over the quota (so it's
> -not attached to a quota) mark it as mortal - so that it
> -will be destroyed and not set up to listen for new
> -connections - unless it's the last client for a specific
> -interface.
> -
> -(cherry picked from commit f97131d21b97381cef72b971b157345c1f9b4115)
> -(cherry picked from commit 9689ffc485df8f971f0ad81ab8ab1f5389493776)
> ----
> - bin/named/client.c | 13 ++++++++++++-
> - 1 file changed, 12 insertions(+), 1 deletion(-)
> -
> -diff --git a/bin/named/client.c b/bin/named/client.c
> -index d482da7121..0739dd48af 100644
> ---- a/bin/named/client.c
> -+++ b/bin/named/client.c
> -@@ -421,8 +421,19 @@ exit_check(ns_client_t *client) {
> - isc_socket_detach(&client->tcpsocket);
> - }
> -
> -- if (client->tcpquota != NULL)
> -+ if (client->tcpquota != NULL) {
> - isc_quota_detach(&client->tcpquota);
> -+ } else {
> -+ /*
> -+ * We went over quota with this client, we don't
> -+ * want to restart listening unless this is the
> -+ * last client on this interface, which is
> -+ * checked later.
> -+ */
> -+ if (TCP_CLIENT(client)) {
> -+ client->mortal = true;
> -+ }
> -+ }
> -
> - if (client->timerset) {
> - (void)isc_timer_reset(client->timer,
> ---
> -2.20.1
> -
> diff --git a/meta/recipes-connectivity/bind/bind/0001-gen.c-extend-DIRNAMESIZE-from-256-to-512.patch b/meta/recipes-connectivity/bind/bind/0001-gen.c-extend-DIRNAMESIZE-from-256-to-512.patch
> deleted file mode 100644
> index a8d601dcaa7..00000000000
> --- a/meta/recipes-connectivity/bind/bind/0001-gen.c-extend-DIRNAMESIZE-from-256-to-512.patch
> +++ /dev/null
> @@ -1,22 +0,0 @@
> -Upstream-Status: Pending
> -
> -Subject: gen.c: extend DIRNAMESIZE from 256 to 512
> -
> -Signed-off-by: Chen Qi <Qi.Chen at windriver.com>
> ----
> - lib/dns/gen.c | 2 +-
> - 1 file changed, 1 insertion(+), 1 deletion(-)
> -
> -Index: bind-9.11.3/lib/dns/gen.c
> -===================================================================
> ---- bind-9.11.3.orig/lib/dns/gen.c
> -+++ bind-9.11.3/lib/dns/gen.c
> -@@ -130,7 +130,7 @@ static const char copyright[] =
> - #define TYPECLASSBUF (TYPECLASSLEN + 1)
> - #define TYPECLASSFMT "%" STR(TYPECLASSLEN) "[-0-9a-z]_%d"
> - #define ATTRIBUTESIZE 256
> --#define DIRNAMESIZE 256
> -+#define DIRNAMESIZE 512
> -
> - static struct cc {
> - struct cc *next;
> diff --git a/meta/recipes-connectivity/bind/bind/0001-lib-dns-gen.c-fix-too-long-error.patch b/meta/recipes-connectivity/bind/bind/0001-lib-dns-gen.c-fix-too-long-error.patch
> deleted file mode 100644
> index 01874a44076..00000000000
> --- a/meta/recipes-connectivity/bind/bind/0001-lib-dns-gen.c-fix-too-long-error.patch
> +++ /dev/null
> @@ -1,31 +0,0 @@
> -From 5bc3167a8b714ec0c4a3f1c7f3b9411296ec0a23 Mon Sep 17 00:00:00 2001
> -From: Robert Yang <liezhi.yang at windriver.com>
> -Date: Wed, 16 Sep 2015 20:23:47 -0700
> -Subject: [PATCH] lib/dns/gen.c: fix too long error
> -
> -The 512 is a little short when build in deep dir, and cause "too long"
> -error, use PATH_MAX if defined.
> -
> -Upstream-Status: Pending
> -
> -Signed-off-by: Robert Yang <liezhi.yang at windriver.com>
> ----
> - lib/dns/gen.c | 4 ++++
> - 1 file changed, 4 insertions(+)
> -
> -Index: bind-9.11.3/lib/dns/gen.c
> -===================================================================
> ---- bind-9.11.3.orig/lib/dns/gen.c
> -+++ bind-9.11.3/lib/dns/gen.c
> -@@ -130,7 +130,11 @@ static const char copyright[] =
> - #define TYPECLASSBUF (TYPECLASSLEN + 1)
> - #define TYPECLASSFMT "%" STR(TYPECLASSLEN) "[-0-9a-z]_%d"
> - #define ATTRIBUTESIZE 256
> -+#ifdef PATH_MAX
> -+#define DIRNAMESIZE PATH_MAX
> -+#else
> - #define DIRNAMESIZE 512
> -+#endif
> -
> - static struct cc {
> - struct cc *next;
> diff --git a/meta/recipes-connectivity/bind/bind/0002-tcp-clients-could-still-be-exceeded-v2.patch b/meta/recipes-connectivity/bind/bind/0002-tcp-clients-could-still-be-exceeded-v2.patch
> deleted file mode 100644
> index ca4e8b1a662..00000000000
> --- a/meta/recipes-connectivity/bind/bind/0002-tcp-clients-could-still-be-exceeded-v2.patch
> +++ /dev/null
> @@ -1,670 +0,0 @@
> -Backport patch to fix CVE-2018-5743.
> -
> -Ref:
> -https://security-tracker.debian.org/tracker/CVE-2018-5743
> -
> -CVE: CVE-2018-5743
> -Upstream-Status: Backport [https://gitlab.isc.org/isc-projects/bind9/commit/719f604]
> -
> -Signed-off-by: Kai Kang <kai.kang at windriver.com>
> -
> -From 719f604e3fad5b7479bd14e2fa0ef4413f0a8fdc Mon Sep 17 00:00:00 2001
> -From: =?UTF-8?q?Witold=20Kr=C4=99cicki?= <wpk at isc.org>
> -Date: Fri, 4 Jan 2019 12:50:51 +0100
> -Subject: [PATCH 2/6] tcp-clients could still be exceeded (v2)
> -
> -the TCP client quota could still be ineffective under some
> -circumstances. this change:
> -
> -- improves quota accounting to ensure that TCP clients are
> - properly limited, while still guaranteeing that at least one client
> - is always available to serve TCP connections on each interface.
> -- uses more descriptive names and removes one (ntcptarget) that
> - was no longer needed
> -- adds comments
> -
> -(cherry picked from commit 924651f1d5e605cd186d03f4f7340bcc54d77cc2)
> -(cherry picked from commit 55a7a458e30e47874d34bdf1079eb863a0512396)
> ----
> - bin/named/client.c | 311 ++++++++++++++++++++-----
> - bin/named/include/named/client.h | 14 +-
> - bin/named/include/named/interfacemgr.h | 11 +-
> - bin/named/interfacemgr.c | 8 +-
> - 4 files changed, 267 insertions(+), 77 deletions(-)
> -
> -diff --git a/bin/named/client.c b/bin/named/client.c
> -index 0739dd48af..a7b49a0f71 100644
> ---- a/bin/named/client.c
> -+++ b/bin/named/client.c
> -@@ -246,10 +246,11 @@ static void ns_client_dumpmessage(ns_client_t *client, const char *reason);
> - static isc_result_t get_client(ns_clientmgr_t *manager, ns_interface_t *ifp,
> - dns_dispatch_t *disp, bool tcp);
> - static isc_result_t get_worker(ns_clientmgr_t *manager, ns_interface_t *ifp,
> -- isc_socket_t *sock);
> -+ isc_socket_t *sock, ns_client_t *oldclient);
> - static inline bool
> --allowed(isc_netaddr_t *addr, dns_name_t *signer, isc_netaddr_t *ecs_addr,
> -- uint8_t ecs_addrlen, uint8_t *ecs_scope, dns_acl_t *acl);
> -+allowed(isc_netaddr_t *addr, dns_name_t *signer,
> -+ isc_netaddr_t *ecs_addr, uint8_t ecs_addrlen,
> -+ uint8_t *ecs_scope, dns_acl_t *acl)
> - static void compute_cookie(ns_client_t *client, uint32_t when,
> - uint32_t nonce, const unsigned char *secret,
> - isc_buffer_t *buf);
> -@@ -405,8 +406,11 @@ exit_check(ns_client_t *client) {
> - */
> - INSIST(client->recursionquota == NULL);
> - INSIST(client->newstate <= NS_CLIENTSTATE_READY);
> -- if (client->nreads > 0)
> -+
> -+ if (client->nreads > 0) {
> - dns_tcpmsg_cancelread(&client->tcpmsg);
> -+ }
> -+
> - if (client->nreads != 0) {
> - /* Still waiting for read cancel completion. */
> - return (true);
> -@@ -416,25 +420,58 @@ exit_check(ns_client_t *client) {
> - dns_tcpmsg_invalidate(&client->tcpmsg);
> - client->tcpmsg_valid = false;
> - }
> -+
> - if (client->tcpsocket != NULL) {
> - CTRACE("closetcp");
> - isc_socket_detach(&client->tcpsocket);
> -+
> -+ if (client->tcpactive) {
> -+ LOCK(&client->interface->lock);
> -+ INSIST(client->interface->ntcpactive > 0);
> -+ client->interface->ntcpactive--;
> -+ UNLOCK(&client->interface->lock);
> -+ client->tcpactive = false;
> -+ }
> - }
> -
> - if (client->tcpquota != NULL) {
> -- isc_quota_detach(&client->tcpquota);
> -- } else {
> - /*
> -- * We went over quota with this client, we don't
> -- * want to restart listening unless this is the
> -- * last client on this interface, which is
> -- * checked later.
> -+ * If we are not in a pipeline group, or
> -+ * we are the last client in the group, detach from
> -+ * tcpquota; otherwise, transfer the quota to
> -+ * another client in the same group.
> - */
> -- if (TCP_CLIENT(client)) {
> -- client->mortal = true;
> -+ if (!ISC_LINK_LINKED(client, glink) ||
> -+ (client->glink.next == NULL &&
> -+ client->glink.prev == NULL))
> -+ {
> -+ isc_quota_detach(&client->tcpquota);
> -+ } else if (client->glink.next != NULL) {
> -+ INSIST(client->glink.next->tcpquota == NULL);
> -+ client->glink.next->tcpquota = client->tcpquota;
> -+ client->tcpquota = NULL;
> -+ } else {
> -+ INSIST(client->glink.prev->tcpquota == NULL);
> -+ client->glink.prev->tcpquota = client->tcpquota;
> -+ client->tcpquota = NULL;
> - }
> - }
> -
> -+ /*
> -+ * Unlink from pipeline group.
> -+ */
> -+ if (ISC_LINK_LINKED(client, glink)) {
> -+ if (client->glink.next != NULL) {
> -+ client->glink.next->glink.prev =
> -+ client->glink.prev;
> -+ }
> -+ if (client->glink.prev != NULL) {
> -+ client->glink.prev->glink.next =
> -+ client->glink.next;
> -+ }
> -+ ISC_LINK_INIT(client, glink);
> -+ }
> -+
> - if (client->timerset) {
> - (void)isc_timer_reset(client->timer,
> - isc_timertype_inactive,
> -@@ -455,15 +492,16 @@ exit_check(ns_client_t *client) {
> - * that already. Check whether this client needs to remain
> - * active and force it to go inactive if not.
> - *
> -- * UDP clients go inactive at this point, but TCP clients
> -- * may remain active if we have fewer active TCP client
> -- * objects than desired due to an earlier quota exhaustion.
> -+ * UDP clients go inactive at this point, but a TCP client
> -+ * will needs to remain active if no other clients are
> -+ * listening for TCP requests on this interface, to
> -+ * prevent this interface from going nonresponsive.
> - */
> - if (client->mortal && TCP_CLIENT(client) && !ns_g_clienttest) {
> - LOCK(&client->interface->lock);
> -- if (client->interface->ntcpcurrent <
> -- client->interface->ntcptarget)
> -+ if (client->interface->ntcpaccepting == 0) {
> - client->mortal = false;
> -+ }
> - UNLOCK(&client->interface->lock);
> - }
> -
> -@@ -472,15 +510,17 @@ exit_check(ns_client_t *client) {
> - * queue for recycling.
> - */
> - if (client->mortal) {
> -- if (client->newstate > NS_CLIENTSTATE_INACTIVE)
> -+ if (client->newstate > NS_CLIENTSTATE_INACTIVE) {
> - client->newstate = NS_CLIENTSTATE_INACTIVE;
> -+ }
> - }
> -
> - if (NS_CLIENTSTATE_READY == client->newstate) {
> - if (TCP_CLIENT(client)) {
> - client_accept(client);
> -- } else
> -+ } else {
> - client_udprecv(client);
> -+ }
> - client->newstate = NS_CLIENTSTATE_MAX;
> - return (true);
> - }
> -@@ -492,41 +532,57 @@ exit_check(ns_client_t *client) {
> - /*
> - * We are trying to enter the inactive state.
> - */
> -- if (client->naccepts > 0)
> -+ if (client->naccepts > 0) {
> - isc_socket_cancel(client->tcplistener, client->task,
> - ISC_SOCKCANCEL_ACCEPT);
> -+ }
> -
> - /* Still waiting for accept cancel completion. */
> -- if (! (client->naccepts == 0))
> -+ if (! (client->naccepts == 0)) {
> - return (true);
> -+ }
> -
> - /* Accept cancel is complete. */
> -- if (client->nrecvs > 0)
> -+ if (client->nrecvs > 0) {
> - isc_socket_cancel(client->udpsocket, client->task,
> - ISC_SOCKCANCEL_RECV);
> -+ }
> -
> - /* Still waiting for recv cancel completion. */
> -- if (! (client->nrecvs == 0))
> -+ if (! (client->nrecvs == 0)) {
> - return (true);
> -+ }
> -
> - /* Still waiting for control event to be delivered */
> -- if (client->nctls > 0)
> -+ if (client->nctls > 0) {
> - return (true);
> --
> -- /* Deactivate the client. */
> -- if (client->interface)
> -- ns_interface_detach(&client->interface);
> -+ }
> -
> - INSIST(client->naccepts == 0);
> - INSIST(client->recursionquota == NULL);
> -- if (client->tcplistener != NULL)
> -+ if (client->tcplistener != NULL) {
> - isc_socket_detach(&client->tcplistener);
> -
> -- if (client->udpsocket != NULL)
> -+ if (client->tcpactive) {
> -+ LOCK(&client->interface->lock);
> -+ INSIST(client->interface->ntcpactive > 0);
> -+ client->interface->ntcpactive--;
> -+ UNLOCK(&client->interface->lock);
> -+ client->tcpactive = false;
> -+ }
> -+ }
> -+ if (client->udpsocket != NULL) {
> - isc_socket_detach(&client->udpsocket);
> -+ }
> -
> -- if (client->dispatch != NULL)
> -+ /* Deactivate the client. */
> -+ if (client->interface != NULL) {
> -+ ns_interface_detach(&client->interface);
> -+ }
> -+
> -+ if (client->dispatch != NULL) {
> - dns_dispatch_detach(&client->dispatch);
> -+ }
> -
> - client->attributes = 0;
> - client->mortal = false;
> -@@ -551,10 +607,13 @@ exit_check(ns_client_t *client) {
> - client->newstate = NS_CLIENTSTATE_MAX;
> - if (!ns_g_clienttest && manager != NULL &&
> - !manager->exiting)
> -+ {
> - ISC_QUEUE_PUSH(manager->inactive, client,
> - ilink);
> -- if (client->needshutdown)
> -+ }
> -+ if (client->needshutdown) {
> - isc_task_shutdown(client->task);
> -+ }
> - return (true);
> - }
> - }
> -@@ -675,7 +734,6 @@ client_start(isc_task_t *task, isc_event_t *event) {
> - }
> - }
> -
> --
> - /*%
> - * The client's task has received a shutdown event.
> - */
> -@@ -2507,17 +2565,12 @@ client_request(isc_task_t *task, isc_event_t *event) {
> - /*
> - * Pipeline TCP query processing.
> - */
> -- if (client->message->opcode != dns_opcode_query)
> -+ if (client->message->opcode != dns_opcode_query) {
> - client->pipelined = false;
> -+ }
> - if (TCP_CLIENT(client) && client->pipelined) {
> -- result = isc_quota_reserve(&ns_g_server->tcpquota);
> -- if (result == ISC_R_SUCCESS)
> -- result = ns_client_replace(client);
> -+ result = ns_client_replace(client);
> - if (result != ISC_R_SUCCESS) {
> -- ns_client_log(client, NS_LOGCATEGORY_CLIENT,
> -- NS_LOGMODULE_CLIENT, ISC_LOG_WARNING,
> -- "no more TCP clients(read): %s",
> -- isc_result_totext(result));
> - client->pipelined = false;
> - }
> - }
> -@@ -3087,6 +3140,7 @@ client_create(ns_clientmgr_t *manager, ns_client_t **clientp) {
> - client->filter_aaaa = dns_aaaa_ok;
> - #endif
> - client->needshutdown = ns_g_clienttest;
> -+ client->tcpactive = false;
> -
> - ISC_EVENT_INIT(&client->ctlevent, sizeof(client->ctlevent), 0, NULL,
> - NS_EVENT_CLIENTCONTROL, client_start, client, client,
> -@@ -3100,6 +3154,7 @@ client_create(ns_clientmgr_t *manager, ns_client_t **clientp) {
> - client->formerrcache.id = 0;
> - ISC_LINK_INIT(client, link);
> - ISC_LINK_INIT(client, rlink);
> -+ ISC_LINK_INIT(client, glink);
> - ISC_QLINK_INIT(client, ilink);
> - client->keytag = NULL;
> - client->keytag_len = 0;
> -@@ -3193,12 +3248,19 @@ client_newconn(isc_task_t *task, isc_event_t *event) {
> -
> - INSIST(client->state == NS_CLIENTSTATE_READY);
> -
> -+ /*
> -+ * The accept() was successful and we're now establishing a new
> -+ * connection. We need to make note of it in the client and
> -+ * interface objects so client objects can do the right thing
> -+ * when going inactive in exit_check() (see comments in
> -+ * client_accept() for details).
> -+ */
> - INSIST(client->naccepts == 1);
> - client->naccepts--;
> -
> - LOCK(&client->interface->lock);
> -- INSIST(client->interface->ntcpcurrent > 0);
> -- client->interface->ntcpcurrent--;
> -+ INSIST(client->interface->ntcpaccepting > 0);
> -+ client->interface->ntcpaccepting--;
> - UNLOCK(&client->interface->lock);
> -
> - /*
> -@@ -3232,6 +3294,9 @@ client_newconn(isc_task_t *task, isc_event_t *event) {
> - NS_LOGMODULE_CLIENT, ISC_LOG_DEBUG(3),
> - "accept failed: %s",
> - isc_result_totext(nevent->result));
> -+ if (client->tcpquota != NULL) {
> -+ isc_quota_detach(&client->tcpquota);
> -+ }
> - }
> -
> - if (exit_check(client))
> -@@ -3270,18 +3335,12 @@ client_newconn(isc_task_t *task, isc_event_t *event) {
> - * deny service to legitimate TCP clients.
> - */
> - client->pipelined = false;
> -- result = isc_quota_attach(&ns_g_server->tcpquota,
> -- &client->tcpquota);
> -- if (result == ISC_R_SUCCESS)
> -- result = ns_client_replace(client);
> -- if (result != ISC_R_SUCCESS) {
> -- ns_client_log(client, NS_LOGCATEGORY_CLIENT,
> -- NS_LOGMODULE_CLIENT, ISC_LOG_WARNING,
> -- "no more TCP clients(accept): %s",
> -- isc_result_totext(result));
> -- } else if (ns_g_server->keepresporder == NULL ||
> -- !allowed(&netaddr, NULL, NULL, 0, NULL,
> -- ns_g_server->keepresporder)) {
> -+ result = ns_client_replace(client);
> -+ if (result == ISC_R_SUCCESS &&
> -+ (client->sctx->keepresporder == NULL ||
> -+ !allowed(&netaddr, NULL, NULL, 0, NULL,
> -+ ns_g_server->keepresporder)))
> -+ {
> - client->pipelined = true;
> - }
> -
> -@@ -3298,12 +3357,80 @@ client_accept(ns_client_t *client) {
> -
> - CTRACE("accept");
> -
> -+ /*
> -+ * The tcpquota object can only be simultaneously referenced a
> -+ * pre-defined number of times; this is configured by 'tcp-clients'
> -+ * in named.conf. If we can't attach to it here, that means the TCP
> -+ * client quota has been exceeded.
> -+ */
> -+ result = isc_quota_attach(&client->sctx->tcpquota,
> -+ &client->tcpquota);
> -+ if (result != ISC_R_SUCCESS) {
> -+ bool exit;
> -+
> -+ ns_client_log(client, NS_LOGCATEGORY_CLIENT,
> -+ NS_LOGMODULE_CLIENT, ISC_LOG_DEBUG(1),
> -+ "no more TCP clients: %s",
> -+ isc_result_totext(result));
> -+
> -+ /*
> -+ * We have exceeded the system-wide TCP client
> -+ * quota. But, we can't just block this accept
> -+ * in all cases, because if we did, a heavy TCP
> -+ * load on other interfaces might cause this
> -+ * interface to be starved, with no clients able
> -+ * to accept new connections.
> -+ *
> -+ * So, we check here to see if any other client
> -+ * is already servicing TCP queries on this
> -+ * interface (whether accepting, reading, or
> -+ * processing).
> -+ *
> -+ * If so, then it's okay *not* to call
> -+ * accept - we can let this client to go inactive
> -+ * and the other one handle the next connection
> -+ * when it's ready.
> -+ *
> -+ * But if not, then we need to be a little bit
> -+ * flexible about the quota. We allow *one* extra
> -+ * TCP client through, to ensure we're listening on
> -+ * every interface.
> -+ *
> -+ * (Note: In practice this means that the *real*
> -+ * TCP client quota is tcp-clients plus the number
> -+ * of interfaces.)
> -+ */
> -+ LOCK(&client->interface->lock);
> -+ exit = (client->interface->ntcpactive > 0);
> -+ UNLOCK(&client->interface->lock);
> -+
> -+ if (exit) {
> -+ client->newstate = NS_CLIENTSTATE_INACTIVE;
> -+ (void)exit_check(client);
> -+ return;
> -+ }
> -+ }
> -+
> -+ /*
> -+ * By incrementing the interface's ntcpactive counter we signal
> -+ * that there is at least one client servicing TCP queries for the
> -+ * interface.
> -+ *
> -+ * We also make note of the fact in the client itself with the
> -+ * tcpactive flag. This ensures proper accounting by preventing
> -+ * us from accidentally incrementing or decrementing ntcpactive
> -+ * more than once per client object.
> -+ */
> -+ if (!client->tcpactive) {
> -+ LOCK(&client->interface->lock);
> -+ client->interface->ntcpactive++;
> -+ UNLOCK(&client->interface->lock);
> -+ client->tcpactive = true;
> -+ }
> -+
> - result = isc_socket_accept(client->tcplistener, client->task,
> - client_newconn, client);
> - if (result != ISC_R_SUCCESS) {
> -- UNEXPECTED_ERROR(__FILE__, __LINE__,
> -- "isc_socket_accept() failed: %s",
> -- isc_result_totext(result));
> - /*
> - * XXXRTH What should we do? We're trying to accept but
> - * it didn't work. If we just give up, then TCP
> -@@ -3311,12 +3438,39 @@ client_accept(ns_client_t *client) {
> - *
> - * For now, we just go idle.
> - */
> -+ UNEXPECTED_ERROR(__FILE__, __LINE__,
> -+ "isc_socket_accept() failed: %s",
> -+ isc_result_totext(result));
> -+ if (client->tcpquota != NULL) {
> -+ isc_quota_detach(&client->tcpquota);
> -+ }
> - return;
> - }
> -+
> -+ /*
> -+ * The client's 'naccepts' counter indicates that this client has
> -+ * called accept() and is waiting for a new connection. It should
> -+ * never exceed 1.
> -+ */
> - INSIST(client->naccepts == 0);
> - client->naccepts++;
> -+
> -+ /*
> -+ * The interface's 'ntcpaccepting' counter is incremented when
> -+ * any client calls accept(), and decremented in client_newconn()
> -+ * once the connection is established.
> -+ *
> -+ * When the client object is shutting down after handling a TCP
> -+ * request (see exit_check()), it looks to see whether this value is
> -+ * non-zero. If so, that means another client has already called
> -+ * accept() and is waiting to establish the next connection, which
> -+ * means the first client is free to go inactive. Otherwise,
> -+ * the first client must come back and call accept() again; this
> -+ * guarantees there will always be at least one client listening
> -+ * for new TCP connections on each interface.
> -+ */
> - LOCK(&client->interface->lock);
> -- client->interface->ntcpcurrent++;
> -+ client->interface->ntcpaccepting++;
> - UNLOCK(&client->interface->lock);
> - }
> -
> -@@ -3390,13 +3544,14 @@ ns_client_replace(ns_client_t *client) {
> - tcp = TCP_CLIENT(client);
> - if (tcp && client->pipelined) {
> - result = get_worker(client->manager, client->interface,
> -- client->tcpsocket);
> -+ client->tcpsocket, client);
> - } else {
> - result = get_client(client->manager, client->interface,
> - client->dispatch, tcp);
> - }
> -- if (result != ISC_R_SUCCESS)
> -+ if (result != ISC_R_SUCCESS) {
> - return (result);
> -+ }
> -
> - /*
> - * The responsibility for listening for new requests is hereby
> -@@ -3585,6 +3740,7 @@ get_client(ns_clientmgr_t *manager, ns_interface_t *ifp,
> - client->attributes |= NS_CLIENTATTR_TCP;
> - isc_socket_attach(ifp->tcpsocket,
> - &client->tcplistener);
> -+
> - } else {
> - isc_socket_t *sock;
> -
> -@@ -3602,7 +3758,8 @@ get_client(ns_clientmgr_t *manager, ns_interface_t *ifp,
> - }
> -
> - static isc_result_t
> --get_worker(ns_clientmgr_t *manager, ns_interface_t *ifp, isc_socket_t *sock)
> -+get_worker(ns_clientmgr_t *manager, ns_interface_t *ifp, isc_socket_t *sock,
> -+ ns_client_t *oldclient)
> - {
> - isc_result_t result = ISC_R_SUCCESS;
> - isc_event_t *ev;
> -@@ -3610,6 +3767,7 @@ get_worker(ns_clientmgr_t *manager, ns_interface_t *ifp, isc_socket_t *sock)
> - MTRACE("get worker");
> -
> - REQUIRE(manager != NULL);
> -+ REQUIRE(oldclient != NULL);
> -
> - if (manager->exiting)
> - return (ISC_R_SHUTTINGDOWN);
> -@@ -3642,7 +3800,28 @@ get_worker(ns_clientmgr_t *manager, ns_interface_t *ifp, isc_socket_t *sock)
> - ns_interface_attach(ifp, &client->interface);
> - client->newstate = client->state = NS_CLIENTSTATE_WORKING;
> - INSIST(client->recursionquota == NULL);
> -- client->tcpquota = &ns_g_server->tcpquota;
> -+
> -+ /*
> -+ * Transfer TCP quota to the new client.
> -+ */
> -+ INSIST(client->tcpquota == NULL);
> -+ INSIST(oldclient->tcpquota != NULL);
> -+ client->tcpquota = oldclient->tcpquota;
> -+ oldclient->tcpquota = NULL;
> -+
> -+ /*
> -+ * Link to a pipeline group, creating it if needed.
> -+ */
> -+ if (!ISC_LINK_LINKED(oldclient, glink)) {
> -+ oldclient->glink.next = NULL;
> -+ oldclient->glink.prev = NULL;
> -+ }
> -+ client->glink.next = oldclient->glink.next;
> -+ client->glink.prev = oldclient;
> -+ if (oldclient->glink.next != NULL) {
> -+ oldclient->glink.next->glink.prev = client;
> -+ }
> -+ oldclient->glink.next = client;
> -
> - client->dscp = ifp->dscp;
> -
> -@@ -3656,6 +3835,12 @@ get_worker(ns_clientmgr_t *manager, ns_interface_t *ifp, isc_socket_t *sock)
> - (void)isc_socket_getpeername(client->tcpsocket, &client->peeraddr);
> - client->peeraddr_valid = true;
> -
> -+ LOCK(&client->interface->lock);
> -+ client->interface->ntcpactive++;
> -+ UNLOCK(&client->interface->lock);
> -+
> -+ client->tcpactive = true;
> -+
> - INSIST(client->tcpmsg_valid == false);
> - dns_tcpmsg_init(client->mctx, client->tcpsocket, &client->tcpmsg);
> - client->tcpmsg_valid = true;
> -diff --git a/bin/named/include/named/client.h b/bin/named/include/named/client.h
> -index b23a7b191d..1f7973f9c5 100644
> ---- a/bin/named/include/named/client.h
> -+++ b/bin/named/include/named/client.h
> -@@ -94,7 +94,8 @@ struct ns_client {
> - int nupdates;
> - int nctls;
> - int references;
> -- bool needshutdown; /*
> -+ bool tcpactive;
> -+ bool needshutdown; /*
> - * Used by clienttest to get
> - * the client to go from
> - * inactive to free state
> -@@ -130,9 +131,9 @@ struct ns_client {
> - isc_stdtime_t now;
> - isc_time_t tnow;
> - dns_name_t signername; /*%< [T]SIG key name */
> -- dns_name_t * signer; /*%< NULL if not valid sig */
> -- bool mortal; /*%< Die after handling request */
> -- bool pipelined; /*%< TCP queries not in sequence */
> -+ dns_name_t *signer; /*%< NULL if not valid sig */
> -+ bool mortal; /*%< Die after handling request */
> -+ bool pipelined; /*%< TCP queries not in sequence */
> - isc_quota_t *tcpquota;
> - isc_quota_t *recursionquota;
> - ns_interface_t *interface;
> -@@ -143,8 +144,8 @@ struct ns_client {
> - isc_sockaddr_t destsockaddr;
> -
> - isc_netaddr_t ecs_addr; /*%< EDNS client subnet */
> -- uint8_t ecs_addrlen;
> -- uint8_t ecs_scope;
> -+ uint8_t ecs_addrlen;
> -+ uint8_t ecs_scope;
> -
> - struct in6_pktinfo pktinfo;
> - isc_dscp_t dscp;
> -@@ -166,6 +167,7 @@ struct ns_client {
> -
> - ISC_LINK(ns_client_t) link;
> - ISC_LINK(ns_client_t) rlink;
> -+ ISC_LINK(ns_client_t) glink;
> - ISC_QLINK(ns_client_t) ilink;
> - unsigned char cookie[8];
> - uint32_t expire;
> -diff --git a/bin/named/include/named/interfacemgr.h b/bin/named/include/named/interfacemgr.h
> -index 7d1883e1e8..61b08826a6 100644
> ---- a/bin/named/include/named/interfacemgr.h
> -+++ b/bin/named/include/named/interfacemgr.h
> -@@ -77,9 +77,14 @@ struct ns_interface {
> - /*%< UDP dispatchers. */
> - isc_socket_t * tcpsocket; /*%< TCP socket. */
> - isc_dscp_t dscp; /*%< "listen-on" DSCP value */
> -- int ntcptarget; /*%< Desired number of concurrent
> -- TCP accepts */
> -- int ntcpcurrent; /*%< Current ditto, locked */
> -+ int ntcpaccepting; /*%< Number of clients
> -+ ready to accept new
> -+ TCP connections on this
> -+ interface */
> -+ int ntcpactive; /*%< Number of clients
> -+ servicing TCP queries
> -+ (whether accepting or
> -+ connected) */
> - int nudpdispatch; /*%< Number of UDP dispatches */
> - ns_clientmgr_t * clientmgr; /*%< Client manager. */
> - ISC_LINK(ns_interface_t) link;
> -diff --git a/bin/named/interfacemgr.c b/bin/named/interfacemgr.c
> -index 419927bf54..955096ef47 100644
> ---- a/bin/named/interfacemgr.c
> -+++ b/bin/named/interfacemgr.c
> -@@ -386,8 +386,8 @@ ns_interface_create(ns_interfacemgr_t *mgr, isc_sockaddr_t *addr,
> - * connections will be handled in parallel even though there is
> - * only one client initially.
> - */
> -- ifp->ntcptarget = 1;
> -- ifp->ntcpcurrent = 0;
> -+ ifp->ntcpaccepting = 0;
> -+ ifp->ntcpactive = 0;
> - ifp->nudpdispatch = 0;
> -
> - ifp->dscp = -1;
> -@@ -522,9 +522,7 @@ ns_interface_accepttcp(ns_interface_t *ifp) {
> - */
> - (void)isc_socket_filter(ifp->tcpsocket, "dataready");
> -
> -- result = ns_clientmgr_createclients(ifp->clientmgr,
> -- ifp->ntcptarget, ifp,
> -- true);
> -+ result = ns_clientmgr_createclients(ifp->clientmgr, 1, ifp, true);
> - if (result != ISC_R_SUCCESS) {
> - UNEXPECTED_ERROR(__FILE__, __LINE__,
> - "TCP ns_clientmgr_createclients(): %s",
> ---
> -2.20.1
> -
> diff --git a/meta/recipes-connectivity/bind/bind/0003-use-reference-counter-for-pipeline-groups-v3.patch b/meta/recipes-connectivity/bind/bind/0003-use-reference-counter-for-pipeline-groups-v3.patch
> deleted file mode 100644
> index 032cfb8c442..00000000000
> --- a/meta/recipes-connectivity/bind/bind/0003-use-reference-counter-for-pipeline-groups-v3.patch
> +++ /dev/null
> @@ -1,278 +0,0 @@
> -Backport patch to fix CVE-2018-5743.
> -
> -Ref:
> -https://security-tracker.debian.org/tracker/CVE-2018-5743
> -
> -CVE: CVE-2018-5743
> -Upstream-Status: Backport [https://gitlab.isc.org/isc-projects/bind9/commit/366b4e1]
> -
> -Signed-off-by: Kai Kang <kai.kang at windriver.com>
> -
> -From 366b4e1ede8aed690e981e07137cb1cb77879c36 Mon Sep 17 00:00:00 2001
> -From: =?UTF-8?q?Micha=C5=82=20K=C4=99pie=C5=84?= <michal at isc.org>
> -Date: Thu, 17 Jan 2019 15:53:38 +0100
> -Subject: [PATCH 3/6] use reference counter for pipeline groups (v3)
> -
> -Track pipeline groups using a shared reference counter
> -instead of a linked list.
> -
> -(cherry picked from commit 513afd33eb17d5dc41a3f0d2d38204ef8c5f6f91)
> -(cherry picked from commit 9446629b730c59c4215f08d37fbaf810282fbccb)
> ----
> - bin/named/client.c | 171 ++++++++++++++++++++-----------
> - bin/named/include/named/client.h | 2 +-
> - 2 files changed, 110 insertions(+), 63 deletions(-)
> -
> -diff --git a/bin/named/client.c b/bin/named/client.c
> -index a7b49a0f71..277656cef0 100644
> ---- a/bin/named/client.c
> -+++ b/bin/named/client.c
> -@@ -299,6 +299,75 @@ ns_client_settimeout(ns_client_t *client, unsigned int seconds) {
> - }
> - }
> -
> -+/*%
> -+ * Allocate a reference counter that will track the number of client structures
> -+ * using the TCP connection that 'client' called accept() for. This counter
> -+ * will be shared between all client structures associated with this TCP
> -+ * connection.
> -+ */
> -+static void
> -+pipeline_init(ns_client_t *client) {
> -+ isc_refcount_t *refs;
> -+
> -+ REQUIRE(client->pipeline_refs == NULL);
> -+
> -+ /*
> -+ * A global memory context is used for the allocation as different
> -+ * client structures may have different memory contexts assigned and a
> -+ * reference counter allocated here might need to be freed by a
> -+ * different client. The performance impact caused by memory context
> -+ * contention here is expected to be negligible, given that this code
> -+ * is only executed for TCP connections.
> -+ */
> -+ refs = isc_mem_allocate(client->sctx->mctx, sizeof(*refs));
> -+ isc_refcount_init(refs, 1);
> -+ client->pipeline_refs = refs;
> -+}
> -+
> -+/*%
> -+ * Increase the count of client structures using the TCP connection that
> -+ * 'source' is associated with and put a pointer to that count in 'target',
> -+ * thus associating it with the same TCP connection.
> -+ */
> -+static void
> -+pipeline_attach(ns_client_t *source, ns_client_t *target) {
> -+ int old_refs;
> -+
> -+ REQUIRE(source->pipeline_refs != NULL);
> -+ REQUIRE(target->pipeline_refs == NULL);
> -+
> -+ old_refs = isc_refcount_increment(source->pipeline_refs);
> -+ INSIST(old_refs > 0);
> -+ target->pipeline_refs = source->pipeline_refs;
> -+}
> -+
> -+/*%
> -+ * Decrease the count of client structures using the TCP connection that
> -+ * 'client' is associated with. If this is the last client using this TCP
> -+ * connection, free the reference counter and return true; otherwise, return
> -+ * false.
> -+ */
> -+static bool
> -+pipeline_detach(ns_client_t *client) {
> -+ isc_refcount_t *refs;
> -+ int old_refs;
> -+
> -+ REQUIRE(client->pipeline_refs != NULL);
> -+
> -+ refs = client->pipeline_refs;
> -+ client->pipeline_refs = NULL;
> -+
> -+ old_refs = isc_refcount_decrement(refs);
> -+ INSIST(old_refs > 0);
> -+
> -+ if (old_refs == 1) {
> -+ isc_mem_free(client->sctx->mctx, refs);
> -+ return (true);
> -+ }
> -+
> -+ return (false);
> -+}
> -+
> - /*%
> - * Check for a deactivation or shutdown request and take appropriate
> - * action. Returns true if either is in progress; in this case
> -@@ -421,6 +490,40 @@ exit_check(ns_client_t *client) {
> - client->tcpmsg_valid = false;
> - }
> -
> -+ if (client->tcpquota != NULL) {
> -+ if (client->pipeline_refs == NULL ||
> -+ pipeline_detach(client))
> -+ {
> -+ /*
> -+ * Only detach from the TCP client quota if
> -+ * there are no more client structures using
> -+ * this TCP connection.
> -+ *
> -+ * Note that we check 'pipeline_refs' and not
> -+ * 'pipelined' because in some cases (e.g.
> -+ * after receiving a request with an opcode
> -+ * different than QUERY) 'pipelined' is set to
> -+ * false after the reference counter gets
> -+ * allocated in pipeline_init() and we must
> -+ * still drop our reference as failing to do so
> -+ * would prevent the reference counter itself
> -+ * from being freed.
> -+ */
> -+ isc_quota_detach(&client->tcpquota);
> -+ } else {
> -+ /*
> -+ * There are other client structures using this
> -+ * TCP connection, so we cannot detach from the
> -+ * TCP client quota to prevent excess TCP
> -+ * connections from being accepted. However,
> -+ * this client structure might later be reused
> -+ * for accepting new connections and thus must
> -+ * have its 'tcpquota' field set to NULL.
> -+ */
> -+ client->tcpquota = NULL;
> -+ }
> -+ }
> -+
> - if (client->tcpsocket != NULL) {
> - CTRACE("closetcp");
> - isc_socket_detach(&client->tcpsocket);
> -@@ -434,44 +537,6 @@ exit_check(ns_client_t *client) {
> - }
> - }
> -
> -- if (client->tcpquota != NULL) {
> -- /*
> -- * If we are not in a pipeline group, or
> -- * we are the last client in the group, detach from
> -- * tcpquota; otherwise, transfer the quota to
> -- * another client in the same group.
> -- */
> -- if (!ISC_LINK_LINKED(client, glink) ||
> -- (client->glink.next == NULL &&
> -- client->glink.prev == NULL))
> -- {
> -- isc_quota_detach(&client->tcpquota);
> -- } else if (client->glink.next != NULL) {
> -- INSIST(client->glink.next->tcpquota == NULL);
> -- client->glink.next->tcpquota = client->tcpquota;
> -- client->tcpquota = NULL;
> -- } else {
> -- INSIST(client->glink.prev->tcpquota == NULL);
> -- client->glink.prev->tcpquota = client->tcpquota;
> -- client->tcpquota = NULL;
> -- }
> -- }
> --
> -- /*
> -- * Unlink from pipeline group.
> -- */
> -- if (ISC_LINK_LINKED(client, glink)) {
> -- if (client->glink.next != NULL) {
> -- client->glink.next->glink.prev =
> -- client->glink.prev;
> -- }
> -- if (client->glink.prev != NULL) {
> -- client->glink.prev->glink.next =
> -- client->glink.next;
> -- }
> -- ISC_LINK_INIT(client, glink);
> -- }
> --
> - if (client->timerset) {
> - (void)isc_timer_reset(client->timer,
> - isc_timertype_inactive,
> -@@ -3130,6 +3195,7 @@ client_create(ns_clientmgr_t *manager, ns_client_t **clientp) {
> - dns_name_init(&client->signername, NULL);
> - client->mortal = false;
> - client->pipelined = false;
> -+ client->pipeline_refs = NULL;
> - client->tcpquota = NULL;
> - client->recursionquota = NULL;
> - client->interface = NULL;
> -@@ -3154,7 +3220,6 @@ client_create(ns_clientmgr_t *manager, ns_client_t **clientp) {
> - client->formerrcache.id = 0;
> - ISC_LINK_INIT(client, link);
> - ISC_LINK_INIT(client, rlink);
> -- ISC_LINK_INIT(client, glink);
> - ISC_QLINK_INIT(client, ilink);
> - client->keytag = NULL;
> - client->keytag_len = 0;
> -@@ -3341,6 +3406,7 @@ client_newconn(isc_task_t *task, isc_event_t *event) {
> - !allowed(&netaddr, NULL, NULL, 0, NULL,
> - ns_g_server->keepresporder)))
> - {
> -+ pipeline_init(client);
> - client->pipelined = true;
> - }
> -
> -@@ -3800,35 +3866,16 @@ get_worker(ns_clientmgr_t *manager, ns_interface_t *ifp, isc_socket_t *sock,
> - ns_interface_attach(ifp, &client->interface);
> - client->newstate = client->state = NS_CLIENTSTATE_WORKING;
> - INSIST(client->recursionquota == NULL);
> --
> -- /*
> -- * Transfer TCP quota to the new client.
> -- */
> -- INSIST(client->tcpquota == NULL);
> -- INSIST(oldclient->tcpquota != NULL);
> -- client->tcpquota = oldclient->tcpquota;
> -- oldclient->tcpquota = NULL;
> --
> -- /*
> -- * Link to a pipeline group, creating it if needed.
> -- */
> -- if (!ISC_LINK_LINKED(oldclient, glink)) {
> -- oldclient->glink.next = NULL;
> -- oldclient->glink.prev = NULL;
> -- }
> -- client->glink.next = oldclient->glink.next;
> -- client->glink.prev = oldclient;
> -- if (oldclient->glink.next != NULL) {
> -- oldclient->glink.next->glink.prev = client;
> -- }
> -- oldclient->glink.next = client;
> -+ client->tcpquota = &client->sctx->tcpquota;
> -
> - client->dscp = ifp->dscp;
> -
> - client->attributes |= NS_CLIENTATTR_TCP;
> -- client->pipelined = true;
> - client->mortal = true;
> -
> -+ pipeline_attach(oldclient, client);
> -+ client->pipelined = true;
> -+
> - isc_socket_attach(ifp->tcpsocket, &client->tcplistener);
> - isc_socket_attach(sock, &client->tcpsocket);
> - isc_socket_setname(client->tcpsocket, "worker-tcp", NULL);
> -diff --git a/bin/named/include/named/client.h b/bin/named/include/named/client.h
> -index 1f7973f9c5..aeed9ccdda 100644
> ---- a/bin/named/include/named/client.h
> -+++ b/bin/named/include/named/client.h
> -@@ -134,6 +134,7 @@ struct ns_client {
> - dns_name_t *signer; /*%< NULL if not valid sig */
> - bool mortal; /*%< Die after handling request */
> - bool pipelined; /*%< TCP queries not in sequence */
> -+ isc_refcount_t *pipeline_refs;
> - isc_quota_t *tcpquota;
> - isc_quota_t *recursionquota;
> - ns_interface_t *interface;
> -@@ -167,7 +168,6 @@ struct ns_client {
> -
> - ISC_LINK(ns_client_t) link;
> - ISC_LINK(ns_client_t) rlink;
> -- ISC_LINK(ns_client_t) glink;
> - ISC_QLINK(ns_client_t) ilink;
> - unsigned char cookie[8];
> - uint32_t expire;
> ---
> -2.20.1
> -
> diff --git a/meta/recipes-connectivity/bind/bind/0004-better-tcpquota-accounting-and-client-mortality-chec.patch b/meta/recipes-connectivity/bind/bind/0004-better-tcpquota-accounting-and-client-mortality-chec.patch
> deleted file mode 100644
> index 034ab13303b..00000000000
> --- a/meta/recipes-connectivity/bind/bind/0004-better-tcpquota-accounting-and-client-mortality-chec.patch
> +++ /dev/null
> @@ -1,512 +0,0 @@
> -Backport patch to fix CVE-2018-5743.
> -
> -Ref:
> -https://security-tracker.debian.org/tracker/CVE-2018-5743
> -
> -CVE: CVE-2018-5743
> -Upstream-Status: Backport [https://gitlab.isc.org/isc-projects/bind9/commit/2ab8a08]
> -
> -Signed-off-by: Kai Kang <kai.kang at windriver.com>
> -
> -From 2ab8a085b3c666f28f1f9229bd6ecb59915b26c3 Mon Sep 17 00:00:00 2001
> -From: Evan Hunt <each at isc.org>
> -Date: Fri, 5 Apr 2019 16:12:18 -0700
> -Subject: [PATCH 4/6] better tcpquota accounting and client mortality checks
> -
> -- ensure that tcpactive is cleaned up correctly when accept() fails.
> -- set 'client->tcpattached' when the client is attached to the tcpquota.
> - carry this value on to new clients sharing the same pipeline group.
> - don't call isc_quota_detach() on the tcpquota unless tcpattached is
> - set. this way clients that were allowed to accept TCP connections
> - despite being over quota (and therefore, were never attached to the
> - quota) will not inadvertently detach from it and mess up the
> - accounting.
> -- simplify the code for tcpquota disconnection by using a new function
> - tcpquota_disconnect().
> -- before deciding whether to reject a new connection due to quota
> - exhaustion, check to see whether there are at least two active
> - clients. previously, this was "at least one", but that could be
> - insufficient if there was one other client in READING state (waiting
> - for messages on an open connection) but none in READY (listening
> - for new connections).
> -- before deciding whether a TCP client object can to go inactive, we
> - must ensure there are enough other clients to maintain service
> - afterward -- both accepting new connections and reading/processing new
> - queries. A TCP client can't shut down unless at least one
> - client is accepting new connections and (in the case of pipelined
> - clients) at least one additional client is waiting to read.
> -
> -(cherry picked from commit c7394738b2445c16f728a88394864dd61baad900)
> -(cherry picked from commit e965d5f11d3d0f6d59704e614fceca2093cb1856)
> -(cherry picked from commit 87d431161450777ea093821212abfb52d51b36e3)
> ----
> - bin/named/client.c | 244 +++++++++++++++++++------------
> - bin/named/include/named/client.h | 3 +-
> - 2 files changed, 152 insertions(+), 95 deletions(-)
> -
> -diff --git a/bin/named/client.c b/bin/named/client.c
> -index 277656cef0..61e96dd28c 100644
> ---- a/bin/named/client.c
> -+++ b/bin/named/client.c
> -@@ -244,13 +244,14 @@ static void client_start(isc_task_t *task, isc_event_t *event);
> - static void client_request(isc_task_t *task, isc_event_t *event);
> - static void ns_client_dumpmessage(ns_client_t *client, const char *reason);
> - static isc_result_t get_client(ns_clientmgr_t *manager, ns_interface_t *ifp,
> -- dns_dispatch_t *disp, bool tcp);
> -+ dns_dispatch_t *disp, ns_client_t *oldclient,
> -+ bool tcp);
> - static isc_result_t get_worker(ns_clientmgr_t *manager, ns_interface_t *ifp,
> - isc_socket_t *sock, ns_client_t *oldclient);
> - static inline bool
> - allowed(isc_netaddr_t *addr, dns_name_t *signer,
> - isc_netaddr_t *ecs_addr, uint8_t ecs_addrlen,
> -- uint8_t *ecs_scope, dns_acl_t *acl)
> -+ uint8_t *ecs_scope, dns_acl_t *acl);
> - static void compute_cookie(ns_client_t *client, uint32_t when,
> - uint32_t nonce, const unsigned char *secret,
> - isc_buffer_t *buf);
> -@@ -319,7 +320,7 @@ pipeline_init(ns_client_t *client) {
> - * contention here is expected to be negligible, given that this code
> - * is only executed for TCP connections.
> - */
> -- refs = isc_mem_allocate(client->sctx->mctx, sizeof(*refs));
> -+ refs = isc_mem_allocate(ns_g_mctx, sizeof(*refs));
> - isc_refcount_init(refs, 1);
> - client->pipeline_refs = refs;
> - }
> -@@ -331,13 +332,13 @@ pipeline_init(ns_client_t *client) {
> - */
> - static void
> - pipeline_attach(ns_client_t *source, ns_client_t *target) {
> -- int old_refs;
> -+ int refs;
> -
> - REQUIRE(source->pipeline_refs != NULL);
> - REQUIRE(target->pipeline_refs == NULL);
> -
> -- old_refs = isc_refcount_increment(source->pipeline_refs);
> -- INSIST(old_refs > 0);
> -+ isc_refcount_increment(source->pipeline_refs, &refs);
> -+ INSIST(refs > 1);
> - target->pipeline_refs = source->pipeline_refs;
> - }
> -
> -@@ -349,25 +350,51 @@ pipeline_attach(ns_client_t *source, ns_client_t *target) {
> - */
> - static bool
> - pipeline_detach(ns_client_t *client) {
> -- isc_refcount_t *refs;
> -- int old_refs;
> -+ isc_refcount_t *refcount;
> -+ int refs;
> -
> - REQUIRE(client->pipeline_refs != NULL);
> -
> -- refs = client->pipeline_refs;
> -+ refcount = client->pipeline_refs;
> - client->pipeline_refs = NULL;
> -
> -- old_refs = isc_refcount_decrement(refs);
> -- INSIST(old_refs > 0);
> -+ isc_refcount_decrement(refcount, refs);
> -
> -- if (old_refs == 1) {
> -- isc_mem_free(client->sctx->mctx, refs);
> -+ if (refs == 0) {
> -+ isc_mem_free(ns_g_mctx, refs);
> - return (true);
> - }
> -
> - return (false);
> - }
> -
> -+/*
> -+ * Detach a client from the TCP client quota if appropriate, and set
> -+ * the quota pointer to NULL.
> -+ *
> -+ * Sometimes when the TCP client quota is exhausted but there are no other
> -+ * clients servicing the interface, a client will be allowed to continue
> -+ * running despite not having been attached to the quota. In this event,
> -+ * the TCP quota was never attached to the client, so when the client (or
> -+ * associated pipeline group) shuts down, the quota must NOT be detached.
> -+ *
> -+ * Otherwise, if the quota pointer is set, it should be detached. If not
> -+ * set at all, we just return without doing anything.
> -+ */
> -+static void
> -+tcpquota_disconnect(ns_client_t *client) {
> -+ if (client->tcpquota == NULL) {
> -+ return;
> -+ }
> -+
> -+ if (client->tcpattached) {
> -+ isc_quota_detach(&client->tcpquota);
> -+ client->tcpattached = false;
> -+ } else {
> -+ client->tcpquota = NULL;
> -+ }
> -+}
> -+
> - /*%
> - * Check for a deactivation or shutdown request and take appropriate
> - * action. Returns true if either is in progress; in this case
> -@@ -490,38 +517,31 @@ exit_check(ns_client_t *client) {
> - client->tcpmsg_valid = false;
> - }
> -
> -- if (client->tcpquota != NULL) {
> -- if (client->pipeline_refs == NULL ||
> -- pipeline_detach(client))
> -- {
> -- /*
> -- * Only detach from the TCP client quota if
> -- * there are no more client structures using
> -- * this TCP connection.
> -- *
> -- * Note that we check 'pipeline_refs' and not
> -- * 'pipelined' because in some cases (e.g.
> -- * after receiving a request with an opcode
> -- * different than QUERY) 'pipelined' is set to
> -- * false after the reference counter gets
> -- * allocated in pipeline_init() and we must
> -- * still drop our reference as failing to do so
> -- * would prevent the reference counter itself
> -- * from being freed.
> -- */
> -- isc_quota_detach(&client->tcpquota);
> -- } else {
> -- /*
> -- * There are other client structures using this
> -- * TCP connection, so we cannot detach from the
> -- * TCP client quota to prevent excess TCP
> -- * connections from being accepted. However,
> -- * this client structure might later be reused
> -- * for accepting new connections and thus must
> -- * have its 'tcpquota' field set to NULL.
> -- */
> -- client->tcpquota = NULL;
> -- }
> -+ /*
> -+ * Detach from pipeline group and from TCP client quota,
> -+ * if appropriate.
> -+ *
> -+ * - If no pipeline group is active, attempt to
> -+ * detach from the TCP client quota.
> -+ *
> -+ * - If a pipeline group is active, detach from it;
> -+ * if the return code indicates that there no more
> -+ * clients left if this pipeline group, we also detach
> -+ * from the TCP client quota.
> -+ *
> -+ * - Otherwise we don't try to detach, we just set the
> -+ * TCP quota pointer to NULL if it wasn't NULL already.
> -+ *
> -+ * tcpquota_disconnect() will set tcpquota to NULL, either
> -+ * by detaching it or by assignment, depending on the
> -+ * needs of the client. See the comments on that function
> -+ * for further information.
> -+ */
> -+ if (client->pipeline_refs == NULL || pipeline_detach(client)) {
> -+ tcpquota_disconnect(client);
> -+ } else {
> -+ client->tcpquota = NULL;
> -+ client->tcpattached = false;
> - }
> -
> - if (client->tcpsocket != NULL) {
> -@@ -544,8 +564,6 @@ exit_check(ns_client_t *client) {
> - client->timerset = false;
> - }
> -
> -- client->pipelined = false;
> --
> - client->peeraddr_valid = false;
> -
> - client->state = NS_CLIENTSTATE_READY;
> -@@ -558,18 +576,27 @@ exit_check(ns_client_t *client) {
> - * active and force it to go inactive if not.
> - *
> - * UDP clients go inactive at this point, but a TCP client
> -- * will needs to remain active if no other clients are
> -- * listening for TCP requests on this interface, to
> -- * prevent this interface from going nonresponsive.
> -+ * may need to remain active and go into ready state if
> -+ * no other clients are available to listen for TCP
> -+ * requests on this interface or (in the case of pipelined
> -+ * clients) to read for additional messages on the current
> -+ * connection.
> - */
> - if (client->mortal && TCP_CLIENT(client) && !ns_g_clienttest) {
> - LOCK(&client->interface->lock);
> -- if (client->interface->ntcpaccepting == 0) {
> -+ if ((client->interface->ntcpaccepting == 0 ||
> -+ (client->pipelined &&
> -+ client->interface->ntcpactive < 2)) &&
> -+ client->newstate != NS_CLIENTSTATE_FREED)
> -+ {
> - client->mortal = false;
> -+ client->newstate = NS_CLIENTSTATE_READY;
> - }
> - UNLOCK(&client->interface->lock);
> - }
> -
> -+ client->pipelined = false;
> -+
> - /*
> - * We don't need the client; send it to the inactive
> - * queue for recycling.
> -@@ -2634,6 +2661,18 @@ client_request(isc_task_t *task, isc_event_t *event) {
> - client->pipelined = false;
> - }
> - if (TCP_CLIENT(client) && client->pipelined) {
> -+ /*
> -+ * We're pipelining. Replace the client; the
> -+ * the replacement can read the TCP socket looking
> -+ * for new messages and this client can process the
> -+ * current message asynchronously.
> -+ *
> -+ * There are now at least three clients using this
> -+ * TCP socket - one accepting new connections,
> -+ * one reading an existing connection to get new
> -+ * messages, and one answering the message already
> -+ * received.
> -+ */
> - result = ns_client_replace(client);
> - if (result != ISC_R_SUCCESS) {
> - client->pipelined = false;
> -@@ -3197,6 +3236,7 @@ client_create(ns_clientmgr_t *manager, ns_client_t **clientp) {
> - client->pipelined = false;
> - client->pipeline_refs = NULL;
> - client->tcpquota = NULL;
> -+ client->tcpattached = false;
> - client->recursionquota = NULL;
> - client->interface = NULL;
> - client->peeraddr_valid = false;
> -@@ -3359,9 +3399,7 @@ client_newconn(isc_task_t *task, isc_event_t *event) {
> - NS_LOGMODULE_CLIENT, ISC_LOG_DEBUG(3),
> - "accept failed: %s",
> - isc_result_totext(nevent->result));
> -- if (client->tcpquota != NULL) {
> -- isc_quota_detach(&client->tcpquota);
> -- }
> -+ tcpquota_disconnect(client);
> - }
> -
> - if (exit_check(client))
> -@@ -3402,7 +3440,7 @@ client_newconn(isc_task_t *task, isc_event_t *event) {
> - client->pipelined = false;
> - result = ns_client_replace(client);
> - if (result == ISC_R_SUCCESS &&
> -- (client->sctx->keepresporder == NULL ||
> -+ (ns_g_server->keepresporder == NULL ||
> - !allowed(&netaddr, NULL, NULL, 0, NULL,
> - ns_g_server->keepresporder)))
> - {
> -@@ -3429,7 +3467,7 @@ client_accept(ns_client_t *client) {
> - * in named.conf. If we can't attach to it here, that means the TCP
> - * client quota has been exceeded.
> - */
> -- result = isc_quota_attach(&client->sctx->tcpquota,
> -+ result = isc_quota_attach(&ns_g_server->tcpquota,
> - &client->tcpquota);
> - if (result != ISC_R_SUCCESS) {
> - bool exit;
> -@@ -3447,27 +3485,27 @@ client_accept(ns_client_t *client) {
> - * interface to be starved, with no clients able
> - * to accept new connections.
> - *
> -- * So, we check here to see if any other client
> -- * is already servicing TCP queries on this
> -+ * So, we check here to see if any other clients
> -+ * are already servicing TCP queries on this
> - * interface (whether accepting, reading, or
> -- * processing).
> -- *
> -- * If so, then it's okay *not* to call
> -- * accept - we can let this client to go inactive
> -- * and the other one handle the next connection
> -- * when it's ready.
> -+ * processing). If there are at least two
> -+ * (one reading and one processing a request)
> -+ * then it's okay *not* to call accept - we
> -+ * can let this client go inactive and another
> -+ * one will resume accepting when it's done.
> - *
> -- * But if not, then we need to be a little bit
> -- * flexible about the quota. We allow *one* extra
> -- * TCP client through, to ensure we're listening on
> -- * every interface.
> -+ * If there aren't enough active clients on the
> -+ * interface, then we can be a little bit
> -+ * flexible about the quota. We'll allow *one*
> -+ * extra client through to ensure we're listening
> -+ * on every interface.
> - *
> -- * (Note: In practice this means that the *real*
> -- * TCP client quota is tcp-clients plus the number
> -- * of interfaces.)
> -+ * (Note: In practice this means that the real
> -+ * TCP client quota is tcp-clients plus the
> -+ * number of listening interfaces plus 2.)
> - */
> - LOCK(&client->interface->lock);
> -- exit = (client->interface->ntcpactive > 0);
> -+ exit = (client->interface->ntcpactive > 1);
> - UNLOCK(&client->interface->lock);
> -
> - if (exit) {
> -@@ -3475,6 +3513,9 @@ client_accept(ns_client_t *client) {
> - (void)exit_check(client);
> - return;
> - }
> -+
> -+ } else {
> -+ client->tcpattached = true;
> - }
> -
> - /*
> -@@ -3507,9 +3548,16 @@ client_accept(ns_client_t *client) {
> - UNEXPECTED_ERROR(__FILE__, __LINE__,
> - "isc_socket_accept() failed: %s",
> - isc_result_totext(result));
> -- if (client->tcpquota != NULL) {
> -- isc_quota_detach(&client->tcpquota);
> -+
> -+ tcpquota_disconnect(client);
> -+
> -+ if (client->tcpactive) {
> -+ LOCK(&client->interface->lock);
> -+ client->interface->ntcpactive--;
> -+ UNLOCK(&client->interface->lock);
> -+ client->tcpactive = false;
> - }
> -+
> - return;
> - }
> -
> -@@ -3527,13 +3575,12 @@ client_accept(ns_client_t *client) {
> - * once the connection is established.
> - *
> - * When the client object is shutting down after handling a TCP
> -- * request (see exit_check()), it looks to see whether this value is
> -- * non-zero. If so, that means another client has already called
> -- * accept() and is waiting to establish the next connection, which
> -- * means the first client is free to go inactive. Otherwise,
> -- * the first client must come back and call accept() again; this
> -- * guarantees there will always be at least one client listening
> -- * for new TCP connections on each interface.
> -+ * request (see exit_check()), if this value is at least one, that
> -+ * means another client has called accept() and is waiting to
> -+ * establish the next connection. That means the client may be
> -+ * be free to become inactive; otherwise it may need to start
> -+ * listening for connections itself to prevent the interface
> -+ * going dead.
> - */
> - LOCK(&client->interface->lock);
> - client->interface->ntcpaccepting++;
> -@@ -3613,19 +3660,19 @@ ns_client_replace(ns_client_t *client) {
> - client->tcpsocket, client);
> - } else {
> - result = get_client(client->manager, client->interface,
> -- client->dispatch, tcp);
> -+ client->dispatch, client, tcp);
> -+
> -+ /*
> -+ * The responsibility for listening for new requests is hereby
> -+ * transferred to the new client. Therefore, the old client
> -+ * should refrain from listening for any more requests.
> -+ */
> -+ client->mortal = true;
> - }
> - if (result != ISC_R_SUCCESS) {
> - return (result);
> - }
> -
> -- /*
> -- * The responsibility for listening for new requests is hereby
> -- * transferred to the new client. Therefore, the old client
> -- * should refrain from listening for any more requests.
> -- */
> -- client->mortal = true;
> --
> - return (ISC_R_SUCCESS);
> - }
> -
> -@@ -3759,7 +3806,7 @@ ns_clientmgr_destroy(ns_clientmgr_t **managerp) {
> -
> - static isc_result_t
> - get_client(ns_clientmgr_t *manager, ns_interface_t *ifp,
> -- dns_dispatch_t *disp, bool tcp)
> -+ dns_dispatch_t *disp, ns_client_t *oldclient, bool tcp)
> - {
> - isc_result_t result = ISC_R_SUCCESS;
> - isc_event_t *ev;
> -@@ -3803,6 +3850,16 @@ get_client(ns_clientmgr_t *manager, ns_interface_t *ifp,
> - client->dscp = ifp->dscp;
> -
> - if (tcp) {
> -+ client->tcpattached = false;
> -+ if (oldclient != NULL) {
> -+ client->tcpattached = oldclient->tcpattached;
> -+ }
> -+
> -+ LOCK(&client->interface->lock);
> -+ client->interface->ntcpactive++;
> -+ UNLOCK(&client->interface->lock);
> -+ client->tcpactive = true;
> -+
> - client->attributes |= NS_CLIENTATTR_TCP;
> - isc_socket_attach(ifp->tcpsocket,
> - &client->tcplistener);
> -@@ -3866,7 +3923,8 @@ get_worker(ns_clientmgr_t *manager, ns_interface_t *ifp, isc_socket_t *sock,
> - ns_interface_attach(ifp, &client->interface);
> - client->newstate = client->state = NS_CLIENTSTATE_WORKING;
> - INSIST(client->recursionquota == NULL);
> -- client->tcpquota = &client->sctx->tcpquota;
> -+ client->tcpquota = &ns_g_server->tcpquota;
> -+ client->tcpattached = oldclient->tcpattached;
> -
> - client->dscp = ifp->dscp;
> -
> -@@ -3885,7 +3943,6 @@ get_worker(ns_clientmgr_t *manager, ns_interface_t *ifp, isc_socket_t *sock,
> - LOCK(&client->interface->lock);
> - client->interface->ntcpactive++;
> - UNLOCK(&client->interface->lock);
> --
> - client->tcpactive = true;
> -
> - INSIST(client->tcpmsg_valid == false);
> -@@ -3913,7 +3970,8 @@ ns_clientmgr_createclients(ns_clientmgr_t *manager, unsigned int n,
> - MTRACE("createclients");
> -
> - for (disp = 0; disp < n; disp++) {
> -- result = get_client(manager, ifp, ifp->udpdispatch[disp], tcp);
> -+ result = get_client(manager, ifp, ifp->udpdispatch[disp],
> -+ NULL, tcp);
> - if (result != ISC_R_SUCCESS)
> - break;
> - }
> -diff --git a/bin/named/include/named/client.h b/bin/named/include/named/client.h
> -index aeed9ccdda..e2c40acd28 100644
> ---- a/bin/named/include/named/client.h
> -+++ b/bin/named/include/named/client.h
> -@@ -9,8 +9,6 @@
> - * information regarding copyright ownership.
> - */
> -
> --/* $Id: client.h,v 1.96 2012/01/31 23:47:31 tbox Exp $ */
> --
> - #ifndef NAMED_CLIENT_H
> - #define NAMED_CLIENT_H 1
> -
> -@@ -136,6 +134,7 @@ struct ns_client {
> - bool pipelined; /*%< TCP queries not in sequence */
> - isc_refcount_t *pipeline_refs;
> - isc_quota_t *tcpquota;
> -+ bool tcpattached;
> - isc_quota_t *recursionquota;
> - ns_interface_t *interface;
> -
> ---
> -2.20.1
> -
> diff --git a/meta/recipes-connectivity/bind/bind/0005-refactor-tcpquota-and-pipeline-refs-allow-special-ca.patch b/meta/recipes-connectivity/bind/bind/0005-refactor-tcpquota-and-pipeline-refs-allow-special-ca.patch
> deleted file mode 100644
> index 987e75bc0ee..00000000000
> --- a/meta/recipes-connectivity/bind/bind/0005-refactor-tcpquota-and-pipeline-refs-allow-special-ca.patch
> +++ /dev/null
> @@ -1,911 +0,0 @@
> -Backport patch to fix CVE-2018-5743.
> -
> -Ref:
> -https://security-tracker.debian.org/tracker/CVE-2018-5743
> -
> -CVE: CVE-2018-5743
> -Upstream-Status: Backport [https://gitlab.isc.org/isc-projects/bind9/commit/c47ccf6]
> -
> -Signed-off-by: Kai Kang <kai.kang at windriver.com>
> -
> -From c47ccf630f147378568b33e8fdb7b754f228c346 Mon Sep 17 00:00:00 2001
> -From: Evan Hunt <each at isc.org>
> -Date: Fri, 5 Apr 2019 16:26:05 -0700
> -Subject: [PATCH 5/6] refactor tcpquota and pipeline refs; allow special-case
> - overrun in isc_quota
> -
> -- if the TCP quota has been exceeded but there are no clients listening
> - for new connections on the interface, we can now force attachment to the
> - quota using isc_quota_force(), instead of carrying on with the quota not
> - attached.
> -- the TCP client quota is now referenced via a reference-counted
> - 'ns_tcpconn' object, one of which is created whenever a client begins
> - listening for new connections, and attached to by members of that
> - client's pipeline group. when the last reference to the tcpconn
> - object is detached, it is freed and the TCP quota slot is released.
> -- reduce code duplication by adding mark_tcp_active() function.
> -- convert counters to atomic.
> -
> -(cherry picked from commit 7e8222378ca24f1302a0c1c638565050ab04681b)
> -(cherry picked from commit 4939451275722bfda490ea86ca13e84f6bc71e46)
> -(cherry picked from commit 13f7c918b8720d890408f678bd73c20e634539d9)
> ----
> - bin/named/client.c | 444 +++++++++++--------------
> - bin/named/include/named/client.h | 12 +-
> - bin/named/include/named/interfacemgr.h | 6 +-
> - bin/named/interfacemgr.c | 1 +
> - lib/isc/include/isc/quota.h | 7 +
> - lib/isc/quota.c | 33 +-
> - lib/isc/win32/libisc.def.in | 1 +
> - 7 files changed, 236 insertions(+), 268 deletions(-)
> -
> -diff --git a/bin/named/client.c b/bin/named/client.c
> -index 61e96dd28c..d826ab32bf 100644
> ---- a/bin/named/client.c
> -+++ b/bin/named/client.c
> -@@ -244,8 +244,7 @@ static void client_start(isc_task_t *task, isc_event_t *event);
> - static void client_request(isc_task_t *task, isc_event_t *event);
> - static void ns_client_dumpmessage(ns_client_t *client, const char *reason);
> - static isc_result_t get_client(ns_clientmgr_t *manager, ns_interface_t *ifp,
> -- dns_dispatch_t *disp, ns_client_t *oldclient,
> -- bool tcp);
> -+ dns_dispatch_t *disp, bool tcp);
> - static isc_result_t get_worker(ns_clientmgr_t *manager, ns_interface_t *ifp,
> - isc_socket_t *sock, ns_client_t *oldclient);
> - static inline bool
> -@@ -301,16 +300,32 @@ ns_client_settimeout(ns_client_t *client, unsigned int seconds) {
> - }
> -
> - /*%
> -- * Allocate a reference counter that will track the number of client structures
> -- * using the TCP connection that 'client' called accept() for. This counter
> -- * will be shared between all client structures associated with this TCP
> -- * connection.
> -+ * Allocate a reference-counted object that will maintain a single pointer to
> -+ * the (also reference-counted) TCP client quota, shared between all the
> -+ * clients processing queries on a single TCP connection, so that all
> -+ * clients sharing the one socket will together consume only one slot in
> -+ * the 'tcp-clients' quota.
> - */
> --static void
> --pipeline_init(ns_client_t *client) {
> -- isc_refcount_t *refs;
> -+static isc_result_t
> -+tcpconn_init(ns_client_t *client, bool force) {
> -+ isc_result_t result;
> -+ isc_quota_t *quota = NULL;
> -+ ns_tcpconn_t *tconn = NULL;
> -
> -- REQUIRE(client->pipeline_refs == NULL);
> -+ REQUIRE(client->tcpconn == NULL);
> -+
> -+ /*
> -+ * Try to attach to the quota first, so we won't pointlessly
> -+ * allocate memory for a tcpconn object if we can't get one.
> -+ */
> -+ if (force) {
> -+ result = isc_quota_force(&ns_g_server->tcpquota, "a);
> -+ } else {
> -+ result = isc_quota_attach(&ns_g_server->tcpquota, "a);
> -+ }
> -+ if (result != ISC_R_SUCCESS) {
> -+ return (result);
> -+ }
> -
> - /*
> - * A global memory context is used for the allocation as different
> -@@ -320,78 +335,80 @@ pipeline_init(ns_client_t *client) {
> - * contention here is expected to be negligible, given that this code
> - * is only executed for TCP connections.
> - */
> -- refs = isc_mem_allocate(ns_g_mctx, sizeof(*refs));
> -- isc_refcount_init(refs, 1);
> -- client->pipeline_refs = refs;
> -+ tconn = isc_mem_allocate(ns_g_mctx, sizeof(*tconn));
> -+
> -+ isc_refcount_init(&tconn->refs, 1);
> -+ tconn->tcpquota = quota;
> -+ quota = NULL;
> -+ tconn->pipelined = false;
> -+
> -+ client->tcpconn = tconn;
> -+
> -+ return (ISC_R_SUCCESS);
> - }
> -
> - /*%
> -- * Increase the count of client structures using the TCP connection that
> -- * 'source' is associated with and put a pointer to that count in 'target',
> -- * thus associating it with the same TCP connection.
> -+ * Increase the count of client structures sharing the TCP connection
> -+ * that 'source' is associated with; add a pointer to the same tcpconn
> -+ * to 'target', thus associating it with the same TCP connection.
> - */
> - static void
> --pipeline_attach(ns_client_t *source, ns_client_t *target) {
> -+tcpconn_attach(ns_client_t *source, ns_client_t *target) {
> - int refs;
> -
> -- REQUIRE(source->pipeline_refs != NULL);
> -- REQUIRE(target->pipeline_refs == NULL);
> -+ REQUIRE(source->tcpconn != NULL);
> -+ REQUIRE(target->tcpconn == NULL);
> -+ REQUIRE(source->tcpconn->pipelined);
> -
> -- isc_refcount_increment(source->pipeline_refs, &refs);
> -+ isc_refcount_increment(&source->tcpconn->refs, &refs);
> - INSIST(refs > 1);
> -- target->pipeline_refs = source->pipeline_refs;
> -+ target->tcpconn = source->tcpconn;
> - }
> -
> - /*%
> -- * Decrease the count of client structures using the TCP connection that
> -+ * Decrease the count of client structures sharing the TCP connection that
> - * 'client' is associated with. If this is the last client using this TCP
> -- * connection, free the reference counter and return true; otherwise, return
> -- * false.
> -+ * connection, we detach from the TCP quota and free the tcpconn
> -+ * object. Either way, client->tcpconn is set to NULL.
> - */
> --static bool
> --pipeline_detach(ns_client_t *client) {
> -- isc_refcount_t *refcount;
> -+static void
> -+tcpconn_detach(ns_client_t *client) {
> -+ ns_tcpconn_t *tconn = NULL;
> - int refs;
> -
> -- REQUIRE(client->pipeline_refs != NULL);
> --
> -- refcount = client->pipeline_refs;
> -- client->pipeline_refs = NULL;
> -+ REQUIRE(client->tcpconn != NULL);
> -
> -- isc_refcount_decrement(refcount, refs);
> -+ tconn = client->tcpconn;
> -+ client->tcpconn = NULL;
> -
> -+ isc_refcount_decrement(&tconn->refs, &refs);
> - if (refs == 0) {
> -- isc_mem_free(ns_g_mctx, refs);
> -- return (true);
> -+ isc_quota_detach(&tconn->tcpquota);
> -+ isc_mem_free(ns_g_mctx, tconn);
> - }
> --
> -- return (false);
> - }
> -
> --/*
> -- * Detach a client from the TCP client quota if appropriate, and set
> -- * the quota pointer to NULL.
> -- *
> -- * Sometimes when the TCP client quota is exhausted but there are no other
> -- * clients servicing the interface, a client will be allowed to continue
> -- * running despite not having been attached to the quota. In this event,
> -- * the TCP quota was never attached to the client, so when the client (or
> -- * associated pipeline group) shuts down, the quota must NOT be detached.
> -+/*%
> -+ * Mark a client as active and increment the interface's 'ntcpactive'
> -+ * counter, as a signal that there is at least one client servicing
> -+ * TCP queries for the interface. If we reach the TCP client quota at
> -+ * some point, this will be used to determine whether a quota overrun
> -+ * should be permitted.
> - *
> -- * Otherwise, if the quota pointer is set, it should be detached. If not
> -- * set at all, we just return without doing anything.
> -+ * Marking the client active with the 'tcpactive' flag ensures proper
> -+ * accounting, by preventing us from incrementing or decrementing
> -+ * 'ntcpactive' more than once per client.
> - */
> - static void
> --tcpquota_disconnect(ns_client_t *client) {
> -- if (client->tcpquota == NULL) {
> -- return;
> -- }
> --
> -- if (client->tcpattached) {
> -- isc_quota_detach(&client->tcpquota);
> -- client->tcpattached = false;
> -- } else {
> -- client->tcpquota = NULL;
> -+mark_tcp_active(ns_client_t *client, bool active) {
> -+ if (active && !client->tcpactive) {
> -+ isc_atomic_xadd(&client->interface->ntcpactive, 1);
> -+ client->tcpactive = active;
> -+ } else if (!active && client->tcpactive) {
> -+ uint32_t old =
> -+ isc_atomic_xadd(&client->interface->ntcpactive, -1);
> -+ INSIST(old > 0);
> -+ client->tcpactive = active;
> - }
> - }
> -
> -@@ -484,7 +501,8 @@ exit_check(ns_client_t *client) {
> - INSIST(client->recursionquota == NULL);
> -
> - if (NS_CLIENTSTATE_READING == client->newstate) {
> -- if (!client->pipelined) {
> -+ INSIST(client->tcpconn != NULL);
> -+ if (!client->tcpconn->pipelined) {
> - client_read(client);
> - client->newstate = NS_CLIENTSTATE_MAX;
> - return (true); /* We're done. */
> -@@ -507,8 +525,8 @@ exit_check(ns_client_t *client) {
> - dns_tcpmsg_cancelread(&client->tcpmsg);
> - }
> -
> -- if (client->nreads != 0) {
> -- /* Still waiting for read cancel completion. */
> -+ /* Still waiting for read cancel completion. */
> -+ if (client->nreads > 0) {
> - return (true);
> - }
> -
> -@@ -518,43 +536,45 @@ exit_check(ns_client_t *client) {
> - }
> -
> - /*
> -- * Detach from pipeline group and from TCP client quota,
> -- * if appropriate.
> -+ * Soon the client will be ready to accept a new TCP
> -+ * connection or UDP request, but we may have enough
> -+ * clients doing that already. Check whether this client
> -+ * needs to remain active and allow it go inactive if
> -+ * not.
> - *
> -- * - If no pipeline group is active, attempt to
> -- * detach from the TCP client quota.
> -+ * UDP clients always go inactive at this point, but a TCP
> -+ * client may need to stay active and return to READY
> -+ * state if no other clients are available to listen
> -+ * for TCP requests on this interface.
> - *
> -- * - If a pipeline group is active, detach from it;
> -- * if the return code indicates that there no more
> -- * clients left if this pipeline group, we also detach
> -- * from the TCP client quota.
> -- *
> -- * - Otherwise we don't try to detach, we just set the
> -- * TCP quota pointer to NULL if it wasn't NULL already.
> -- *
> -- * tcpquota_disconnect() will set tcpquota to NULL, either
> -- * by detaching it or by assignment, depending on the
> -- * needs of the client. See the comments on that function
> -- * for further information.
> -+ * Regardless, if we're going to FREED state, that means
> -+ * the system is shutting down and we don't need to
> -+ * retain clients.
> - */
> -- if (client->pipeline_refs == NULL || pipeline_detach(client)) {
> -- tcpquota_disconnect(client);
> -- } else {
> -- client->tcpquota = NULL;
> -- client->tcpattached = false;
> -+ if (client->mortal && TCP_CLIENT(client) &&
> -+ client->newstate != NS_CLIENTSTATE_FREED &&
> -+ !ns_g_clienttest &&
> -+ isc_atomic_xadd(&client->interface->ntcpaccepting, 0) == 0)
> -+ {
> -+ /* Nobody else is accepting */
> -+ client->mortal = false;
> -+ client->newstate = NS_CLIENTSTATE_READY;
> -+ }
> -+
> -+ /*
> -+ * Detach from TCP connection and TCP client quota,
> -+ * if appropriate. If this is the last reference to
> -+ * the TCP connection in our pipeline group, the
> -+ * TCP quota slot will be released.
> -+ */
> -+ if (client->tcpconn) {
> -+ tcpconn_detach(client);
> - }
> -
> - if (client->tcpsocket != NULL) {
> - CTRACE("closetcp");
> - isc_socket_detach(&client->tcpsocket);
> --
> -- if (client->tcpactive) {
> -- LOCK(&client->interface->lock);
> -- INSIST(client->interface->ntcpactive > 0);
> -- client->interface->ntcpactive--;
> -- UNLOCK(&client->interface->lock);
> -- client->tcpactive = false;
> -- }
> -+ mark_tcp_active(client, false);
> - }
> -
> - if (client->timerset) {
> -@@ -567,35 +587,6 @@ exit_check(ns_client_t *client) {
> - client->peeraddr_valid = false;
> -
> - client->state = NS_CLIENTSTATE_READY;
> -- INSIST(client->recursionquota == NULL);
> --
> -- /*
> -- * Now the client is ready to accept a new TCP connection
> -- * or UDP request, but we may have enough clients doing
> -- * that already. Check whether this client needs to remain
> -- * active and force it to go inactive if not.
> -- *
> -- * UDP clients go inactive at this point, but a TCP client
> -- * may need to remain active and go into ready state if
> -- * no other clients are available to listen for TCP
> -- * requests on this interface or (in the case of pipelined
> -- * clients) to read for additional messages on the current
> -- * connection.
> -- */
> -- if (client->mortal && TCP_CLIENT(client) && !ns_g_clienttest) {
> -- LOCK(&client->interface->lock);
> -- if ((client->interface->ntcpaccepting == 0 ||
> -- (client->pipelined &&
> -- client->interface->ntcpactive < 2)) &&
> -- client->newstate != NS_CLIENTSTATE_FREED)
> -- {
> -- client->mortal = false;
> -- client->newstate = NS_CLIENTSTATE_READY;
> -- }
> -- UNLOCK(&client->interface->lock);
> -- }
> --
> -- client->pipelined = false;
> -
> - /*
> - * We don't need the client; send it to the inactive
> -@@ -630,7 +621,7 @@ exit_check(ns_client_t *client) {
> - }
> -
> - /* Still waiting for accept cancel completion. */
> -- if (! (client->naccepts == 0)) {
> -+ if (client->naccepts > 0) {
> - return (true);
> - }
> -
> -@@ -641,7 +632,7 @@ exit_check(ns_client_t *client) {
> - }
> -
> - /* Still waiting for recv cancel completion. */
> -- if (! (client->nrecvs == 0)) {
> -+ if (client->nrecvs > 0) {
> - return (true);
> - }
> -
> -@@ -654,14 +645,7 @@ exit_check(ns_client_t *client) {
> - INSIST(client->recursionquota == NULL);
> - if (client->tcplistener != NULL) {
> - isc_socket_detach(&client->tcplistener);
> --
> -- if (client->tcpactive) {
> -- LOCK(&client->interface->lock);
> -- INSIST(client->interface->ntcpactive > 0);
> -- client->interface->ntcpactive--;
> -- UNLOCK(&client->interface->lock);
> -- client->tcpactive = false;
> -- }
> -+ mark_tcp_active(client, false);
> - }
> - if (client->udpsocket != NULL) {
> - isc_socket_detach(&client->udpsocket);
> -@@ -816,7 +800,7 @@ client_start(isc_task_t *task, isc_event_t *event) {
> - return;
> -
> - if (TCP_CLIENT(client)) {
> -- if (client->pipelined) {
> -+ if (client->tcpconn != NULL) {
> - client_read(client);
> - } else {
> - client_accept(client);
> -@@ -2470,6 +2454,7 @@ client_request(isc_task_t *task, isc_event_t *event) {
> - client->nrecvs--;
> - } else {
> - INSIST(TCP_CLIENT(client));
> -+ INSIST(client->tcpconn != NULL);
> - REQUIRE(event->ev_type == DNS_EVENT_TCPMSG);
> - REQUIRE(event->ev_sender == &client->tcpmsg);
> - buffer = &client->tcpmsg.buffer;
> -@@ -2657,17 +2642,19 @@ client_request(isc_task_t *task, isc_event_t *event) {
> - /*
> - * Pipeline TCP query processing.
> - */
> -- if (client->message->opcode != dns_opcode_query) {
> -- client->pipelined = false;
> -+ if (TCP_CLIENT(client) &&
> -+ client->message->opcode != dns_opcode_query)
> -+ {
> -+ client->tcpconn->pipelined = false;
> - }
> -- if (TCP_CLIENT(client) && client->pipelined) {
> -+ if (TCP_CLIENT(client) && client->tcpconn->pipelined) {
> - /*
> - * We're pipelining. Replace the client; the
> -- * the replacement can read the TCP socket looking
> -- * for new messages and this client can process the
> -+ * replacement can read the TCP socket looking
> -+ * for new messages and this one can process the
> - * current message asynchronously.
> - *
> -- * There are now at least three clients using this
> -+ * There will now be at least three clients using this
> - * TCP socket - one accepting new connections,
> - * one reading an existing connection to get new
> - * messages, and one answering the message already
> -@@ -2675,7 +2662,7 @@ client_request(isc_task_t *task, isc_event_t *event) {
> - */
> - result = ns_client_replace(client);
> - if (result != ISC_R_SUCCESS) {
> -- client->pipelined = false;
> -+ client->tcpconn->pipelined = false;
> - }
> - }
> -
> -@@ -3233,10 +3220,7 @@ client_create(ns_clientmgr_t *manager, ns_client_t **clientp) {
> - client->signer = NULL;
> - dns_name_init(&client->signername, NULL);
> - client->mortal = false;
> -- client->pipelined = false;
> -- client->pipeline_refs = NULL;
> -- client->tcpquota = NULL;
> -- client->tcpattached = false;
> -+ client->tcpconn = NULL;
> - client->recursionquota = NULL;
> - client->interface = NULL;
> - client->peeraddr_valid = false;
> -@@ -3341,9 +3325,10 @@ client_read(ns_client_t *client) {
> -
> - static void
> - client_newconn(isc_task_t *task, isc_event_t *event) {
> -+ isc_result_t result;
> - ns_client_t *client = event->ev_arg;
> - isc_socket_newconnev_t *nevent = (isc_socket_newconnev_t *)event;
> -- isc_result_t result;
> -+ uint32_t old;
> -
> - REQUIRE(event->ev_type == ISC_SOCKEVENT_NEWCONN);
> - REQUIRE(NS_CLIENT_VALID(client));
> -@@ -3363,10 +3348,8 @@ client_newconn(isc_task_t *task, isc_event_t *event) {
> - INSIST(client->naccepts == 1);
> - client->naccepts--;
> -
> -- LOCK(&client->interface->lock);
> -- INSIST(client->interface->ntcpaccepting > 0);
> -- client->interface->ntcpaccepting--;
> -- UNLOCK(&client->interface->lock);
> -+ old = isc_atomic_xadd(&client->interface->ntcpaccepting, -1);
> -+ INSIST(old > 0);
> -
> - /*
> - * We must take ownership of the new socket before the exit
> -@@ -3399,7 +3382,7 @@ client_newconn(isc_task_t *task, isc_event_t *event) {
> - NS_LOGMODULE_CLIENT, ISC_LOG_DEBUG(3),
> - "accept failed: %s",
> - isc_result_totext(nevent->result));
> -- tcpquota_disconnect(client);
> -+ tcpconn_detach(client);
> - }
> -
> - if (exit_check(client))
> -@@ -3437,15 +3420,13 @@ client_newconn(isc_task_t *task, isc_event_t *event) {
> - * telnetting to port 53 (once per CPU) will
> - * deny service to legitimate TCP clients.
> - */
> -- client->pipelined = false;
> - result = ns_client_replace(client);
> - if (result == ISC_R_SUCCESS &&
> - (ns_g_server->keepresporder == NULL ||
> - !allowed(&netaddr, NULL, NULL, 0, NULL,
> - ns_g_server->keepresporder)))
> - {
> -- pipeline_init(client);
> -- client->pipelined = true;
> -+ client->tcpconn->pipelined = true;
> - }
> -
> - client_read(client);
> -@@ -3462,78 +3443,59 @@ client_accept(ns_client_t *client) {
> - CTRACE("accept");
> -
> - /*
> -- * The tcpquota object can only be simultaneously referenced a
> -- * pre-defined number of times; this is configured by 'tcp-clients'
> -- * in named.conf. If we can't attach to it here, that means the TCP
> -- * client quota has been exceeded.
> -+ * Set up a new TCP connection. This means try to attach to the
> -+ * TCP client quota (tcp-clients), but fail if we're over quota.
> - */
> -- result = isc_quota_attach(&ns_g_server->tcpquota,
> -- &client->tcpquota);
> -+ result = tcpconn_init(client, false);
> - if (result != ISC_R_SUCCESS) {
> -- bool exit;
> -+ bool exit;
> -
> -- ns_client_log(client, NS_LOGCATEGORY_CLIENT,
> -- NS_LOGMODULE_CLIENT, ISC_LOG_DEBUG(1),
> -- "no more TCP clients: %s",
> -- isc_result_totext(result));
> --
> -- /*
> -- * We have exceeded the system-wide TCP client
> -- * quota. But, we can't just block this accept
> -- * in all cases, because if we did, a heavy TCP
> -- * load on other interfaces might cause this
> -- * interface to be starved, with no clients able
> -- * to accept new connections.
> -- *
> -- * So, we check here to see if any other clients
> -- * are already servicing TCP queries on this
> -- * interface (whether accepting, reading, or
> -- * processing). If there are at least two
> -- * (one reading and one processing a request)
> -- * then it's okay *not* to call accept - we
> -- * can let this client go inactive and another
> -- * one will resume accepting when it's done.
> -- *
> -- * If there aren't enough active clients on the
> -- * interface, then we can be a little bit
> -- * flexible about the quota. We'll allow *one*
> -- * extra client through to ensure we're listening
> -- * on every interface.
> -- *
> -- * (Note: In practice this means that the real
> -- * TCP client quota is tcp-clients plus the
> -- * number of listening interfaces plus 2.)
> -- */
> -- LOCK(&client->interface->lock);
> -- exit = (client->interface->ntcpactive > 1);
> -- UNLOCK(&client->interface->lock);
> -+ ns_client_log(client, NS_LOGCATEGORY_CLIENT,
> -+ NS_LOGMODULE_CLIENT, ISC_LOG_WARNING,
> -+ "TCP client quota reached: %s",
> -+ isc_result_totext(result));
> -
> -- if (exit) {
> -- client->newstate = NS_CLIENTSTATE_INACTIVE;
> -- (void)exit_check(client);
> -- return;
> -- }
> -+ /*
> -+ * We have exceeded the system-wide TCP client quota. But,
> -+ * we can't just block this accept in all cases, because if
> -+ * we did, a heavy TCP load on other interfaces might cause
> -+ * this interface to be starved, with no clients able to
> -+ * accept new connections.
> -+ *
> -+ * So, we check here to see if any other clients are
> -+ * already servicing TCP queries on this interface (whether
> -+ * accepting, reading, or processing). If we find at least
> -+ * one, then it's okay *not* to call accept - we can let this
> -+ * client go inactive and another will take over when it's
> -+ * done.
> -+ *
> -+ * If there aren't enough active clients on the interface,
> -+ * then we can be a little bit flexible about the quota.
> -+ * We'll allow *one* extra client through to ensure we're
> -+ * listening on every interface; we do this by setting the
> -+ * 'force' option to tcpconn_init().
> -+ *
> -+ * (Note: In practice this means that the real TCP client
> -+ * quota is tcp-clients plus the number of listening
> -+ * interfaces plus 1.)
> -+ */
> -+ exit = (isc_atomic_xadd(&client->interface->ntcpactive, 0) > 0);
> -+ if (exit) {
> -+ client->newstate = NS_CLIENTSTATE_INACTIVE;
> -+ (void)exit_check(client);
> -+ return;
> -+ }
> -
> -- } else {
> -- client->tcpattached = true;
> -+ result = tcpconn_init(client, true);
> -+ RUNTIME_CHECK(result == ISC_R_SUCCESS);
> - }
> -
> - /*
> -- * By incrementing the interface's ntcpactive counter we signal
> -- * that there is at least one client servicing TCP queries for the
> -- * interface.
> -- *
> -- * We also make note of the fact in the client itself with the
> -- * tcpactive flag. This ensures proper accounting by preventing
> -- * us from accidentally incrementing or decrementing ntcpactive
> -- * more than once per client object.
> -+ * If this client was set up using get_client() or get_worker(),
> -+ * then TCP is already marked active. However, if it was restarted
> -+ * from exit_check(), it might not be, so we take care of it now.
> - */
> -- if (!client->tcpactive) {
> -- LOCK(&client->interface->lock);
> -- client->interface->ntcpactive++;
> -- UNLOCK(&client->interface->lock);
> -- client->tcpactive = true;
> -- }
> -+ mark_tcp_active(client, true);
> -
> - result = isc_socket_accept(client->tcplistener, client->task,
> - client_newconn, client);
> -@@ -3549,15 +3511,8 @@ client_accept(ns_client_t *client) {
> - "isc_socket_accept() failed: %s",
> - isc_result_totext(result));
> -
> -- tcpquota_disconnect(client);
> --
> -- if (client->tcpactive) {
> -- LOCK(&client->interface->lock);
> -- client->interface->ntcpactive--;
> -- UNLOCK(&client->interface->lock);
> -- client->tcpactive = false;
> -- }
> --
> -+ tcpconn_detach(client);
> -+ mark_tcp_active(client, false);
> - return;
> - }
> -
> -@@ -3582,9 +3537,7 @@ client_accept(ns_client_t *client) {
> - * listening for connections itself to prevent the interface
> - * going dead.
> - */
> -- LOCK(&client->interface->lock);
> -- client->interface->ntcpaccepting++;
> -- UNLOCK(&client->interface->lock);
> -+ isc_atomic_xadd(&client->interface->ntcpaccepting, 1);
> - }
> -
> - static void
> -@@ -3655,24 +3608,25 @@ ns_client_replace(ns_client_t *client) {
> - REQUIRE(client->manager != NULL);
> -
> - tcp = TCP_CLIENT(client);
> -- if (tcp && client->pipelined) {
> -+ if (tcp && client->tcpconn != NULL && client->tcpconn->pipelined) {
> - result = get_worker(client->manager, client->interface,
> - client->tcpsocket, client);
> - } else {
> - result = get_client(client->manager, client->interface,
> -- client->dispatch, client, tcp);
> -+ client->dispatch, tcp);
> -
> -- /*
> -- * The responsibility for listening for new requests is hereby
> -- * transferred to the new client. Therefore, the old client
> -- * should refrain from listening for any more requests.
> -- */
> -- client->mortal = true;
> - }
> - if (result != ISC_R_SUCCESS) {
> - return (result);
> - }
> -
> -+ /*
> -+ * The responsibility for listening for new requests is hereby
> -+ * transferred to the new client. Therefore, the old client
> -+ * should refrain from listening for any more requests.
> -+ */
> -+ client->mortal = true;
> -+
> - return (ISC_R_SUCCESS);
> - }
> -
> -@@ -3806,7 +3760,7 @@ ns_clientmgr_destroy(ns_clientmgr_t **managerp) {
> -
> - static isc_result_t
> - get_client(ns_clientmgr_t *manager, ns_interface_t *ifp,
> -- dns_dispatch_t *disp, ns_client_t *oldclient, bool tcp)
> -+ dns_dispatch_t *disp, bool tcp)
> - {
> - isc_result_t result = ISC_R_SUCCESS;
> - isc_event_t *ev;
> -@@ -3850,15 +3804,7 @@ get_client(ns_clientmgr_t *manager, ns_interface_t *ifp,
> - client->dscp = ifp->dscp;
> -
> - if (tcp) {
> -- client->tcpattached = false;
> -- if (oldclient != NULL) {
> -- client->tcpattached = oldclient->tcpattached;
> -- }
> --
> -- LOCK(&client->interface->lock);
> -- client->interface->ntcpactive++;
> -- UNLOCK(&client->interface->lock);
> -- client->tcpactive = true;
> -+ mark_tcp_active(client, true);
> -
> - client->attributes |= NS_CLIENTATTR_TCP;
> - isc_socket_attach(ifp->tcpsocket,
> -@@ -3923,16 +3869,14 @@ get_worker(ns_clientmgr_t *manager, ns_interface_t *ifp, isc_socket_t *sock,
> - ns_interface_attach(ifp, &client->interface);
> - client->newstate = client->state = NS_CLIENTSTATE_WORKING;
> - INSIST(client->recursionquota == NULL);
> -- client->tcpquota = &ns_g_server->tcpquota;
> -- client->tcpattached = oldclient->tcpattached;
> -
> - client->dscp = ifp->dscp;
> -
> - client->attributes |= NS_CLIENTATTR_TCP;
> - client->mortal = true;
> -
> -- pipeline_attach(oldclient, client);
> -- client->pipelined = true;
> -+ tcpconn_attach(oldclient, client);
> -+ mark_tcp_active(client, true);
> -
> - isc_socket_attach(ifp->tcpsocket, &client->tcplistener);
> - isc_socket_attach(sock, &client->tcpsocket);
> -@@ -3940,11 +3884,6 @@ get_worker(ns_clientmgr_t *manager, ns_interface_t *ifp, isc_socket_t *sock,
> - (void)isc_socket_getpeername(client->tcpsocket, &client->peeraddr);
> - client->peeraddr_valid = true;
> -
> -- LOCK(&client->interface->lock);
> -- client->interface->ntcpactive++;
> -- UNLOCK(&client->interface->lock);
> -- client->tcpactive = true;
> --
> - INSIST(client->tcpmsg_valid == false);
> - dns_tcpmsg_init(client->mctx, client->tcpsocket, &client->tcpmsg);
> - client->tcpmsg_valid = true;
> -@@ -3970,8 +3909,7 @@ ns_clientmgr_createclients(ns_clientmgr_t *manager, unsigned int n,
> - MTRACE("createclients");
> -
> - for (disp = 0; disp < n; disp++) {
> -- result = get_client(manager, ifp, ifp->udpdispatch[disp],
> -- NULL, tcp);
> -+ result = get_client(manager, ifp, ifp->udpdispatch[disp], tcp);
> - if (result != ISC_R_SUCCESS)
> - break;
> - }
> -diff --git a/bin/named/include/named/client.h b/bin/named/include/named/client.h
> -index e2c40acd28..969ee4c08f 100644
> ---- a/bin/named/include/named/client.h
> -+++ b/bin/named/include/named/client.h
> -@@ -78,6 +78,13 @@
> - *** Types
> - ***/
> -
> -+/*% reference-counted TCP connection object */
> -+typedef struct ns_tcpconn {
> -+ isc_refcount_t refs;
> -+ isc_quota_t *tcpquota;
> -+ bool pipelined;
> -+} ns_tcpconn_t;
> -+
> - /*% nameserver client structure */
> - struct ns_client {
> - unsigned int magic;
> -@@ -131,10 +138,7 @@ struct ns_client {
> - dns_name_t signername; /*%< [T]SIG key name */
> - dns_name_t *signer; /*%< NULL if not valid sig */
> - bool mortal; /*%< Die after handling request */
> -- bool pipelined; /*%< TCP queries not in sequence */
> -- isc_refcount_t *pipeline_refs;
> -- isc_quota_t *tcpquota;
> -- bool tcpattached;
> -+ ns_tcpconn_t *tcpconn;
> - isc_quota_t *recursionquota;
> - ns_interface_t *interface;
> -
> -diff --git a/bin/named/include/named/interfacemgr.h b/bin/named/include/named/interfacemgr.h
> -index 61b08826a6..3535ef22a8 100644
> ---- a/bin/named/include/named/interfacemgr.h
> -+++ b/bin/named/include/named/interfacemgr.h
> -@@ -9,8 +9,6 @@
> - * information regarding copyright ownership.
> - */
> -
> --/* $Id: interfacemgr.h,v 1.35 2011/07/28 23:47:58 tbox Exp $ */
> --
> - #ifndef NAMED_INTERFACEMGR_H
> - #define NAMED_INTERFACEMGR_H 1
> -
> -@@ -77,11 +75,11 @@ struct ns_interface {
> - /*%< UDP dispatchers. */
> - isc_socket_t * tcpsocket; /*%< TCP socket. */
> - isc_dscp_t dscp; /*%< "listen-on" DSCP value */
> -- int ntcpaccepting; /*%< Number of clients
> -+ int32_t ntcpaccepting; /*%< Number of clients
> - ready to accept new
> - TCP connections on this
> - interface */
> -- int ntcpactive; /*%< Number of clients
> -+ int32_t ntcpactive; /*%< Number of clients
> - servicing TCP queries
> - (whether accepting or
> - connected) */
> -diff --git a/bin/named/interfacemgr.c b/bin/named/interfacemgr.c
> -index 955096ef47..d9f6df5802 100644
> ---- a/bin/named/interfacemgr.c
> -+++ b/bin/named/interfacemgr.c
> -@@ -388,6 +388,7 @@ ns_interface_create(ns_interfacemgr_t *mgr, isc_sockaddr_t *addr,
> - */
> - ifp->ntcpaccepting = 0;
> - ifp->ntcpactive = 0;
> -+
> - ifp->nudpdispatch = 0;
> -
> - ifp->dscp = -1;
> -diff --git a/lib/isc/include/isc/quota.h b/lib/isc/include/isc/quota.h
> -index b9bf59877a..36c5830242 100644
> ---- a/lib/isc/include/isc/quota.h
> -+++ b/lib/isc/include/isc/quota.h
> -@@ -100,6 +100,13 @@ isc_quota_attach(isc_quota_t *quota, isc_quota_t **p);
> - * quota if successful (ISC_R_SUCCESS or ISC_R_SOFTQUOTA).
> - */
> -
> -+isc_result_t
> -+isc_quota_force(isc_quota_t *quota, isc_quota_t **p);
> -+/*%<
> -+ * Like isc_quota_attach, but will attach '*p' to the quota
> -+ * even if the hard quota has been exceeded.
> -+ */
> -+
> - void
> - isc_quota_detach(isc_quota_t **p);
> - /*%<
> -diff --git a/lib/isc/quota.c b/lib/isc/quota.c
> -index 3ddff0d875..556a61f21d 100644
> ---- a/lib/isc/quota.c
> -+++ b/lib/isc/quota.c
> -@@ -74,20 +74,39 @@ isc_quota_release(isc_quota_t *quota) {
> - UNLOCK("a->lock);
> - }
> -
> --isc_result_t
> --isc_quota_attach(isc_quota_t *quota, isc_quota_t **p)
> --{
> -+static isc_result_t
> -+doattach(isc_quota_t *quota, isc_quota_t **p, bool force) {
> - isc_result_t result;
> -- INSIST(p != NULL && *p == NULL);
> -+ REQUIRE(p != NULL && *p == NULL);
> -+
> - result = isc_quota_reserve(quota);
> -- if (result == ISC_R_SUCCESS || result == ISC_R_SOFTQUOTA)
> -+ if (result == ISC_R_SUCCESS || result == ISC_R_SOFTQUOTA) {
> -+ *p = quota;
> -+ } else if (result == ISC_R_QUOTA && force) {
> -+ /* attach anyway */
> -+ LOCK("a->lock);
> -+ quota->used++;
> -+ UNLOCK("a->lock);
> -+
> - *p = quota;
> -+ result = ISC_R_SUCCESS;
> -+ }
> -+
> - return (result);
> - }
> -
> -+isc_result_t
> -+isc_quota_attach(isc_quota_t *quota, isc_quota_t **p) {
> -+ return (doattach(quota, p, false));
> -+}
> -+
> -+isc_result_t
> -+isc_quota_force(isc_quota_t *quota, isc_quota_t **p) {
> -+ return (doattach(quota, p, true));
> -+}
> -+
> - void
> --isc_quota_detach(isc_quota_t **p)
> --{
> -+isc_quota_detach(isc_quota_t **p) {
> - INSIST(p != NULL && *p != NULL);
> - isc_quota_release(*p);
> - *p = NULL;
> -diff --git a/lib/isc/win32/libisc.def.in b/lib/isc/win32/libisc.def.in
> -index a82facec0f..7b9f23d776 100644
> ---- a/lib/isc/win32/libisc.def.in
> -+++ b/lib/isc/win32/libisc.def.in
> -@@ -519,6 +519,7 @@ isc_portset_removerange
> - isc_quota_attach
> - isc_quota_destroy
> - isc_quota_detach
> -+isc_quota_force
> - isc_quota_init
> - isc_quota_max
> - isc_quota_release
> ---
> -2.20.1
> -
> diff --git a/meta/recipes-connectivity/bind/bind/0006-restore-allowance-for-tcp-clients-interfaces.patch b/meta/recipes-connectivity/bind/bind/0006-restore-allowance-for-tcp-clients-interfaces.patch
> deleted file mode 100644
> index 3821d185012..00000000000
> --- a/meta/recipes-connectivity/bind/bind/0006-restore-allowance-for-tcp-clients-interfaces.patch
> +++ /dev/null
> @@ -1,80 +0,0 @@
> -Backport patch to fix CVE-2018-5743.
> -
> -Ref:
> -https://security-tracker.debian.org/tracker/CVE-2018-5743
> -
> -CVE: CVE-2018-5743
> -Upstream-Status: Backport [https://gitlab.isc.org/isc-projects/bind9/commit/59434b9]
> -
> -Signed-off-by: Kai Kang <kai.kang at windriver.com>
> -
> -From 59434b987e8eb436b08c24e559ee094c4e939daa Mon Sep 17 00:00:00 2001
> -From: Evan Hunt <each at isc.org>
> -Date: Fri, 5 Apr 2019 16:26:19 -0700
> -Subject: [PATCH 6/6] restore allowance for tcp-clients < interfaces
> -
> -in the "refactor tcpquota and pipeline refs" commit, the counting
> -of active interfaces was tightened in such a way that named could
> -fail to listen on an interface if there were more interfaces than
> -tcp-clients. when checking the quota to start accepting on an
> -interface, if the number of active clients was above zero, then
> -it was presumed that some other client was able to handle accepting
> -new connections. this, however, ignored the fact that the current client
> -could be included in that count, so if the quota was already exceeded
> -before all the interfaces were listening, some interfaces would never
> -listen.
> -
> -we now check whether the current client has been marked active; if so,
> -then the number of active clients on the interface must be greater
> -than 1, not 0.
> -
> -(cherry picked from commit 0b4e2cd4c3192ba88569dd344f542a8cc43742b5)
> -(cherry picked from commit d01023aaac35543daffbdf48464e320150235d41)
> ----
> - bin/named/client.c | 8 +++++---
> - doc/arm/Bv9ARM-book.xml | 3 ++-
> - 2 files changed, 7 insertions(+), 4 deletions(-)
> -
> -diff --git a/bin/named/client.c b/bin/named/client.c
> -index d826ab32bf..845326abc0 100644
> ---- a/bin/named/client.c
> -+++ b/bin/named/client.c
> -@@ -3464,8 +3464,9 @@ client_accept(ns_client_t *client) {
> - *
> - * So, we check here to see if any other clients are
> - * already servicing TCP queries on this interface (whether
> -- * accepting, reading, or processing). If we find at least
> -- * one, then it's okay *not* to call accept - we can let this
> -+ * accepting, reading, or processing). If we find that at
> -+ * least one client other than this one is active, then
> -+ * it's okay *not* to call accept - we can let this
> - * client go inactive and another will take over when it's
> - * done.
> - *
> -@@ -3479,7 +3480,8 @@ client_accept(ns_client_t *client) {
> - * quota is tcp-clients plus the number of listening
> - * interfaces plus 1.)
> - */
> -- exit = (isc_atomic_xadd(&client->interface->ntcpactive, 0) > 0);
> -+ exit = (isc_atomic_xadd(&client->interface->ntcpactive, 0) >
> -+ (client->tcpactive ? 1 : 0));
> - if (exit) {
> - client->newstate = NS_CLIENTSTATE_INACTIVE;
> - (void)exit_check(client);
> -diff --git a/doc/arm/Bv9ARM-book.xml b/doc/arm/Bv9ARM-book.xml
> -index 381768d540..9c76d3cd6f 100644
> ---- a/doc/arm/Bv9ARM-book.xml
> -+++ b/doc/arm/Bv9ARM-book.xml
> -@@ -8493,7 +8493,8 @@ avoid-v6-udp-ports { 40000; range 50000 60000; };
> - <para>
> - The number of file descriptors reserved for TCP, stdio,
> - etc. This needs to be big enough to cover the number of
> -- interfaces <command>named</command> listens on, <command>tcp-clients</command> as well as
> -+ interfaces <command>named</command> listens on plus
> -+ <command>tcp-clients</command>, as well as
> - to provide room for outgoing TCP queries and incoming zone
> - transfers. The default is <literal>512</literal>.
> - The minimum value is <literal>128</literal> and the
> ---
> -2.20.1
> -
> diff --git a/meta/recipes-connectivity/bind/bind/0007-Replace-atomic-operations-in-bin-named-client.c-with.patch b/meta/recipes-connectivity/bind/bind/0007-Replace-atomic-operations-in-bin-named-client.c-with.patch
> deleted file mode 100644
> index 1a84eca58a7..00000000000
> --- a/meta/recipes-connectivity/bind/bind/0007-Replace-atomic-operations-in-bin-named-client.c-with.patch
> +++ /dev/null
> @@ -1,140 +0,0 @@
> -Backport commit to fix compile error on arm caused by commits which are
> -to fix CVE-2018-5743.
> -
> -CVE: CVE-2018-5743
> -Upstream-Status: Backport [https://gitlab.isc.org/isc-projects/bind9/commit/ef49780]
> -
> -Signed-off-by: Kai Kang <kai.kang at windriver.com>
> -
> -From ef49780d30d3ddc5735cfc32561b678a634fa72f Mon Sep 17 00:00:00 2001
> -From: =?UTF-8?q?Ond=C5=99ej=20Sur=C3=BD?= <ondrej at sury.org>
> -Date: Wed, 17 Apr 2019 15:22:27 +0200
> -Subject: [PATCH] Replace atomic operations in bin/named/client.c with
> - isc_refcount reference counting
> -
> ----
> - bin/named/client.c | 18 +++++++-----------
> - bin/named/include/named/interfacemgr.h | 5 +++--
> - bin/named/interfacemgr.c | 7 +++++--
> - 3 files changed, 15 insertions(+), 15 deletions(-)
> -
> -diff --git a/bin/named/client.c b/bin/named/client.c
> -index 845326abc0..29fecadca8 100644
> ---- a/bin/named/client.c
> -+++ b/bin/named/client.c
> -@@ -402,12 +402,10 @@ tcpconn_detach(ns_client_t *client) {
> - static void
> - mark_tcp_active(ns_client_t *client, bool active) {
> - if (active && !client->tcpactive) {
> -- isc_atomic_xadd(&client->interface->ntcpactive, 1);
> -+ isc_refcount_increment0(&client->interface->ntcpactive, NULL);
> - client->tcpactive = active;
> - } else if (!active && client->tcpactive) {
> -- uint32_t old =
> -- isc_atomic_xadd(&client->interface->ntcpactive, -1);
> -- INSIST(old > 0);
> -+ isc_refcount_decrement(&client->interface->ntcpactive, NULL);
> - client->tcpactive = active;
> - }
> - }
> -@@ -554,7 +552,7 @@ exit_check(ns_client_t *client) {
> - if (client->mortal && TCP_CLIENT(client) &&
> - client->newstate != NS_CLIENTSTATE_FREED &&
> - !ns_g_clienttest &&
> -- isc_atomic_xadd(&client->interface->ntcpaccepting, 0) == 0)
> -+ isc_refcount_current(&client->interface->ntcpaccepting) == 0)
> - {
> - /* Nobody else is accepting */
> - client->mortal = false;
> -@@ -3328,7 +3326,6 @@ client_newconn(isc_task_t *task, isc_event_t *event) {
> - isc_result_t result;
> - ns_client_t *client = event->ev_arg;
> - isc_socket_newconnev_t *nevent = (isc_socket_newconnev_t *)event;
> -- uint32_t old;
> -
> - REQUIRE(event->ev_type == ISC_SOCKEVENT_NEWCONN);
> - REQUIRE(NS_CLIENT_VALID(client));
> -@@ -3348,8 +3345,7 @@ client_newconn(isc_task_t *task, isc_event_t *event) {
> - INSIST(client->naccepts == 1);
> - client->naccepts--;
> -
> -- old = isc_atomic_xadd(&client->interface->ntcpaccepting, -1);
> -- INSIST(old > 0);
> -+ isc_refcount_decrement(&client->interface->ntcpaccepting, NULL);
> -
> - /*
> - * We must take ownership of the new socket before the exit
> -@@ -3480,8 +3476,8 @@ client_accept(ns_client_t *client) {
> - * quota is tcp-clients plus the number of listening
> - * interfaces plus 1.)
> - */
> -- exit = (isc_atomic_xadd(&client->interface->ntcpactive, 0) >
> -- (client->tcpactive ? 1 : 0));
> -+ exit = (isc_refcount_current(&client->interface->ntcpactive) >
> -+ (client->tcpactive ? 1U : 0U));
> - if (exit) {
> - client->newstate = NS_CLIENTSTATE_INACTIVE;
> - (void)exit_check(client);
> -@@ -3539,7 +3535,7 @@ client_accept(ns_client_t *client) {
> - * listening for connections itself to prevent the interface
> - * going dead.
> - */
> -- isc_atomic_xadd(&client->interface->ntcpaccepting, 1);
> -+ isc_refcount_increment0(&client->interface->ntcpaccepting, NULL);
> - }
> -
> - static void
> -diff --git a/bin/named/include/named/interfacemgr.h b/bin/named/include/named/interfacemgr.h
> -index 3535ef22a8..6e10f210fd 100644
> ---- a/bin/named/include/named/interfacemgr.h
> -+++ b/bin/named/include/named/interfacemgr.h
> -@@ -45,6 +45,7 @@
> - #include <isc/magic.h>
> - #include <isc/mem.h>
> - #include <isc/socket.h>
> -+#include <isc/refcount.h>
> -
> - #include <dns/result.h>
> -
> -@@ -75,11 +76,11 @@ struct ns_interface {
> - /*%< UDP dispatchers. */
> - isc_socket_t * tcpsocket; /*%< TCP socket. */
> - isc_dscp_t dscp; /*%< "listen-on" DSCP value */
> -- int32_t ntcpaccepting; /*%< Number of clients
> -+ isc_refcount_t ntcpaccepting; /*%< Number of clients
> - ready to accept new
> - TCP connections on this
> - interface */
> -- int32_t ntcpactive; /*%< Number of clients
> -+ isc_refcount_t ntcpactive; /*%< Number of clients
> - servicing TCP queries
> - (whether accepting or
> - connected) */
> -diff --git a/bin/named/interfacemgr.c b/bin/named/interfacemgr.c
> -index d9f6df5802..135533be6b 100644
> ---- a/bin/named/interfacemgr.c
> -+++ b/bin/named/interfacemgr.c
> -@@ -386,8 +386,8 @@ ns_interface_create(ns_interfacemgr_t *mgr, isc_sockaddr_t *addr,
> - * connections will be handled in parallel even though there is
> - * only one client initially.
> - */
> -- ifp->ntcpaccepting = 0;
> -- ifp->ntcpactive = 0;
> -+ isc_refcount_init(&ifp->ntcpaccepting, 0);
> -+ isc_refcount_init(&ifp->ntcpactive, 0);
> -
> - ifp->nudpdispatch = 0;
> -
> -@@ -618,6 +618,9 @@ ns_interface_destroy(ns_interface_t *ifp) {
> -
> - ns_interfacemgr_detach(&ifp->mgr);
> -
> -+ isc_refcount_destroy(&ifp->ntcpactive);
> -+ isc_refcount_destroy(&ifp->ntcpaccepting);
> -+
> - ifp->magic = 0;
> - isc_mem_put(mctx, ifp, sizeof(*ifp));
> - }
> ---
> -2.20.1
> -
> diff --git a/meta/recipes-connectivity/bind/bind/bind-ensure-searching-for-json-headers-searches-sysr.patch b/meta/recipes-connectivity/bind/bind/bind-ensure-searching-for-json-headers-searches-sysr.patch
> index 37e210e6da9..84559e5f378 100644
> --- a/meta/recipes-connectivity/bind/bind/bind-ensure-searching-for-json-headers-searches-sysr.patch
> +++ b/meta/recipes-connectivity/bind/bind/bind-ensure-searching-for-json-headers-searches-sysr.patch
> @@ -1,4 +1,4 @@
> -From 9473d29843579802e96b0293a3e953fed93de82c Mon Sep 17 00:00:00 2001
> +From edda20fb5a6e88548f85e39d34d6c074306e15bc Mon Sep 17 00:00:00 2001
> From: Paul Gortmaker <paul.gortmaker at windriver.com>
> Date: Tue, 9 Jun 2015 11:22:00 -0400
> Subject: [PATCH] bind: ensure searching for json headers searches sysroot
> @@ -27,15 +27,16 @@ to make use of the combination some day.
>
> Upstream-Status: Inappropriate [OE Specific]
> Signed-off-by: Paul Gortmaker <paul.gortmaker at windriver.com>
> +
> ---
> - configure.in | 2 +-
> + configure.ac | 2 +-
> 1 file changed, 1 insertion(+), 1 deletion(-)
>
> -Index: bind-9.11.3/configure.in
> -===================================================================
> ---- bind-9.11.3.orig/configure.in
> -+++ bind-9.11.3/configure.in
> -@@ -2574,7 +2574,7 @@ case "$use_libjson" in
> +diff --git a/configure.ac b/configure.ac
> +index 17392fd..e85a5c6 100644
> +--- a/configure.ac
> ++++ b/configure.ac
> +@@ -2449,7 +2449,7 @@ case "$use_libjson" in
> libjson_libs=""
> ;;
> auto|yes)
> diff --git a/meta/recipes-connectivity/bind/bind_9.11.5-P4.bb b/meta/recipes-connectivity/bind/bind_9.11.13.bb
> similarity index 86%
> rename from meta/recipes-connectivity/bind/bind_9.11.5-P4.bb
> rename to meta/recipes-connectivity/bind/bind_9.11.13.bb
> index 0897706346b..338d6c717a6 100644
> --- a/meta/recipes-connectivity/bind/bind_9.11.5-P4.bb
> +++ b/meta/recipes-connectivity/bind/bind_9.11.13.bb
> @@ -15,23 +15,13 @@ SRC_URI = "https://ftp.isc.org/isc/bind9/${PV}/${BPN}-${PV}.tar.gz \
> file://make-etc-initd-bind-stop-work.patch \
> file://init.d-add-support-for-read-only-rootfs.patch \
> file://bind-ensure-searching-for-json-headers-searches-sysr.patch \
> - file://0001-gen.c-extend-DIRNAMESIZE-from-256-to-512.patch \
> - file://0001-lib-dns-gen.c-fix-too-long-error.patch \
> file://0001-configure.in-remove-useless-L-use_openssl-lib.patch \
> file://0001-named-lwresd-V-and-start-log-hide-build-options.patch \
> file://0001-avoid-start-failure-with-bind-user.patch \
> - file://0001-bind-fix-CVE-2019-6471.patch \
> - file://0001-fix-enforcement-of-tcp-clients-v1.patch \
> - file://0002-tcp-clients-could-still-be-exceeded-v2.patch \
> - file://0003-use-reference-counter-for-pipeline-groups-v3.patch \
> - file://0004-better-tcpquota-accounting-and-client-mortality-chec.patch \
> - file://0005-refactor-tcpquota-and-pipeline-refs-allow-special-ca.patch \
> - file://0006-restore-allowance-for-tcp-clients-interfaces.patch \
> - file://0007-Replace-atomic-operations-in-bin-named-client.c-with.patch \
> -"
> -
> -SRC_URI[md5sum] = "8ddab4b61fa4516fe404679c74e37960"
> -SRC_URI[sha256sum] = "7e8c08192bcbaeb6e9f2391a70e67583b027b90e8c4bc1605da6eb126edde434"
> + "
> +
> +SRC_URI[md5sum] = "17de0d024ab1eac377f1c2854dc25057"
> +SRC_URI[sha256sum] = "fd3f3cc9fcfcdaa752db35eb24598afa1fdcc2509d3227fc90a8631b7b400f7d"
>
> UPSTREAM_CHECK_URI = "https://ftp.isc.org/isc/bind9/"
> # stay at 9.11 until 9.16, from 9.16 follow the ESV versions divisible by 4
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