[OE-core] [warrior][PATCH] qemu: Fix CVE-2019-8934
msft.dantran at gmail.com
msft.dantran at gmail.com
Wed Sep 25 17:05:13 UTC 2019
From: Dan Tran <dantran at microsoft.com>
Signed-off-by: Dan Tran <dantran at microsoft.com>
---
meta/recipes-devtools/qemu/qemu.inc | 3 +-
.../qemu/qemu/CVE-2019-8934.patch | 215 ++++++++++++++++++
2 files changed, 217 insertions(+), 1 deletion(-)
create mode 100644 meta/recipes-devtools/qemu/qemu/CVE-2019-8934.patch
diff --git a/meta/recipes-devtools/qemu/qemu.inc b/meta/recipes-devtools/qemu/qemu.inc
index e503aa866d..1f8c1b3135 100644
--- a/meta/recipes-devtools/qemu/qemu.inc
+++ b/meta/recipes-devtools/qemu/qemu.inc
@@ -30,7 +30,8 @@ SRC_URI = "https://download.qemu.org/${BPN}-${PV}.tar.xz \
file://0018-fix-CVE-2018-20191.patch \
file://0019-fix-CVE-2018-20216.patch \
file://CVE-2019-3812.patch \
- "
+ file://CVE-2019-8934.patch \
+ "
UPSTREAM_CHECK_REGEX = "qemu-(?P<pver>\d+(\.\d+)+)\.tar"
SRC_URI[md5sum] = "fb687ce0b02d3bf4327e36d3b99427a8"
diff --git a/meta/recipes-devtools/qemu/qemu/CVE-2019-8934.patch b/meta/recipes-devtools/qemu/qemu/CVE-2019-8934.patch
new file mode 100644
index 0000000000..d1d7d23968
--- /dev/null
+++ b/meta/recipes-devtools/qemu/qemu/CVE-2019-8934.patch
@@ -0,0 +1,215 @@
+From 8c2e30a92d95d89e2cf45d229bce274881026cf7 Mon Sep 17 00:00:00 2001
+From: Prasad J Pandit <pjp at fedoraproject.org>
+Date: Mon, 18 Feb 2019 23:43:49 +0530
+Subject: [PATCH] ppc: add host-serial and host-model machine attributes
+ (CVE-2019-8934)
+MIME-Version: 1.0
+Content-Type: text/plain; charset=UTF-8
+Content-Transfer-Encoding: 8bit
+
+On ppc hosts, hypervisor shares following system attributes
+
+ - /proc/device-tree/system-id
+ - /proc/device-tree/model
+
+with a guest. This could lead to information leakage and misuse.[*]
+Add machine attributes to control such system information exposure
+to a guest.
+
+[*] https://wiki.openstack.org/wiki/OSSN/OSSN-0028
+
+Reported-by: Daniel P. Berrangé <berrange at redhat.com>
+Fix-suggested-by: Daniel P. Berrangé <berrange at redhat.com>
+Signed-off-by: Prasad J Pandit <pjp at fedoraproject.org>
+Message-Id: <20190218181349.23885-1-ppandit at redhat.com>
+Reviewed-by: Daniel P. Berrangé <berrange at redhat.com>
+Reviewed-by: Greg Kurz <groug at kaod.org>
+Signed-off-by: David Gibson <david at gibson.dropbear.id.au>
+
+CVE: CVE-2019-8934
+Upstream-Status: Backport
+[https://github.com/qemu/qemu/commit/27461d69a0f108dea756419251acc3ea65198f1b]
+
+Signed-off-by: Dan Tran <dantran at microsoft.com>
+---
+ hw/ppc/spapr.c | 128 ++++++++++++++++++++++++++++++++++++++---
+ include/hw/ppc/spapr.h | 2 +
+ 2 files changed, 123 insertions(+), 7 deletions(-)
+
+diff --git a/hw/ppc/spapr.c b/hw/ppc/spapr.c
+index 7afd1a175b..bcee7c162d 100644
+--- a/hw/ppc/spapr.c
++++ b/hw/ppc/spapr.c
+@@ -1244,13 +1244,30 @@ static void *spapr_build_fdt(sPAPRMachineState *spapr,
+ * Add info to guest to indentify which host is it being run on
+ * and what is the uuid of the guest
+ */
+- if (kvmppc_get_host_model(&buf)) {
+- _FDT(fdt_setprop_string(fdt, 0, "host-model", buf));
+- g_free(buf);
++ if (spapr->host_model && !g_str_equal(spapr->host_model, "none")) {
++ if (g_str_equal(spapr->host_model, "passthrough")) {
++ /* -M host-model=passthrough */
++ if (kvmppc_get_host_model(&buf)) {
++ _FDT(fdt_setprop_string(fdt, 0, "host-model", buf));
++ g_free(buf);
++ }
++ } else {
++ /* -M host-model=<user-string> */
++ _FDT(fdt_setprop_string(fdt, 0, "host-model", spapr->host_model));
++ }
+ }
+- if (kvmppc_get_host_serial(&buf)) {
+- _FDT(fdt_setprop_string(fdt, 0, "host-serial", buf));
+- g_free(buf);
++
++ if (spapr->host_serial && !g_str_equal(spapr->host_serial, "none")) {
++ if (g_str_equal(spapr->host_serial, "passthrough")) {
++ /* -M host-serial=passthrough */
++ if (kvmppc_get_host_serial(&buf)) {
++ _FDT(fdt_setprop_string(fdt, 0, "host-serial", buf));
++ g_free(buf);
++ }
++ } else {
++ /* -M host-serial=<user-string> */
++ _FDT(fdt_setprop_string(fdt, 0, "host-serial", spapr->host_serial));
++ }
+ }
+
+ buf = qemu_uuid_unparse_strdup(&qemu_uuid);
+@@ -3031,6 +3048,73 @@ static void spapr_set_vsmt(Object *obj, Visitor *v, const char *name,
+ visit_type_uint32(v, name, (uint32_t *)opaque, errp);
+ }
+
++static char *spapr_get_ic_mode(Object *obj, Error **errp)
++{
++ sPAPRMachineState *spapr = SPAPR_MACHINE(obj);
++
++ if (spapr->irq == &spapr_irq_xics_legacy) {
++ return g_strdup("legacy");
++ } else if (spapr->irq == &spapr_irq_xics) {
++ return g_strdup("xics");
++ } else if (spapr->irq == &spapr_irq_xive) {
++ return g_strdup("xive");
++ } else if (spapr->irq == &spapr_irq_dual) {
++ return g_strdup("dual");
++ }
++ g_assert_not_reached();
++}
++
++static void spapr_set_ic_mode(Object *obj, const char *value, Error **errp)
++{
++ sPAPRMachineState *spapr = SPAPR_MACHINE(obj);
++
++ if (SPAPR_MACHINE_GET_CLASS(spapr)->legacy_irq_allocation) {
++ error_setg(errp, "This machine only uses the legacy XICS backend, don't pass ic-mode");
++ return;
++ }
++
++ /* The legacy IRQ backend can not be set */
++ if (strcmp(value, "xics") == 0) {
++ spapr->irq = &spapr_irq_xics;
++ } else if (strcmp(value, "xive") == 0) {
++ spapr->irq = &spapr_irq_xive;
++ } else if (strcmp(value, "dual") == 0) {
++ spapr->irq = &spapr_irq_dual;
++ } else {
++ error_setg(errp, "Bad value for \"ic-mode\" property");
++ }
++}
++
++static char *spapr_get_host_model(Object *obj, Error **errp)
++{
++ sPAPRMachineState *spapr = SPAPR_MACHINE(obj);
++
++ return g_strdup(spapr->host_model);
++}
++
++static void spapr_set_host_model(Object *obj, const char *value, Error **errp)
++{
++ sPAPRMachineState *spapr = SPAPR_MACHINE(obj);
++
++ g_free(spapr->host_model);
++ spapr->host_model = g_strdup(value);
++}
++
++static char *spapr_get_host_serial(Object *obj, Error **errp)
++{
++ sPAPRMachineState *spapr = SPAPR_MACHINE(obj);
++
++ return g_strdup(spapr->host_serial);
++}
++
++static void spapr_set_host_serial(Object *obj, const char *value, Error **errp)
++{
++ sPAPRMachineState *spapr = SPAPR_MACHINE(obj);
++
++ g_free(spapr->host_serial);
++ spapr->host_serial = g_strdup(value);
++}
++
+ static void spapr_instance_init(Object *obj)
+ {
+ sPAPRMachineState *spapr = SPAPR_MACHINE(obj);
+@@ -3067,6 +3151,25 @@ static void spapr_instance_init(Object *obj)
+ " the host's SMT mode", &error_abort);
+ object_property_add_bool(obj, "vfio-no-msix-emulation",
+ spapr_get_msix_emulation, NULL, NULL);
++
++ /* The machine class defines the default interrupt controller mode */
++ spapr->irq = smc->irq;
++ object_property_add_str(obj, "ic-mode", spapr_get_ic_mode,
++ spapr_set_ic_mode, NULL);
++ object_property_set_description(obj, "ic-mode",
++ "Specifies the interrupt controller mode (xics, xive, dual)",
++ NULL);
++
++ object_property_add_str(obj, "host-model",
++ spapr_get_host_model, spapr_set_host_model,
++ &error_abort);
++ object_property_set_description(obj, "host-model",
++ "Set host's model-id to use - none|passthrough|string", &error_abort);
++ object_property_add_str(obj, "host-serial",
++ spapr_get_host_serial, spapr_set_host_serial,
++ &error_abort);
++ object_property_set_description(obj, "host-serial",
++ "Set host's system-id to use - none|passthrough|string", &error_abort);
+ }
+
+ static void spapr_machine_finalizefn(Object *obj)
+@@ -3965,7 +4068,18 @@ static void spapr_machine_3_1_instance_options(MachineState *machine)
+
+ static void spapr_machine_3_1_class_options(MachineClass *mc)
+ {
+- /* Defaults for the latest behaviour inherited from the base class */
++ sPAPRMachineClass *smc = SPAPR_MACHINE_CLASS(mc);
++ static GlobalProperty compat[] = {
++ { TYPE_SPAPR_MACHINE, "host-model", "passthrough" },
++ { TYPE_SPAPR_MACHINE, "host-serial", "passthrough" },
++ };
++
++ spapr_machine_4_0_class_options(mc);
++ compat_props_add(mc->compat_props, hw_compat_3_1, hw_compat_3_1_len);
++ compat_props_add(mc->compat_props, compat, G_N_ELEMENTS(compat));
++
++ mc->default_cpu_type = POWERPC_CPU_TYPE_NAME("power8_v2.0");
++ smc->update_dt_enabled = false;
+ }
+
+ DEFINE_SPAPR_MACHINE(3_1, "3.1", true);
+diff --git a/include/hw/ppc/spapr.h b/include/hw/ppc/spapr.h
+index 6279711fe8..63692a13bd 100644
+--- a/include/hw/ppc/spapr.h
++++ b/include/hw/ppc/spapr.h
+@@ -171,6 +171,8 @@ struct sPAPRMachineState {
+
+ /*< public >*/
+ char *kvm_type;
++ char *host_model;
++ char *host_serial;
+
+ const char *icp_type;
+ int32_t irq_map_nr;
+--
+2.22.0.vfs.1.1.57.gbaf16c8
+
--
2.17.1
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