[OE-core] [PATCH v2] libarchive: Set xattrs after setting times
Dmitry Rozhkov
dmitry.rozhkov at linux.intel.com
Mon Feb 29 15:48:33 UTC 2016
With Integrity Measurement Architecture (IMA) enabled in Linux
kernel the security.ima extended attribute gets overwritten
when setting times on a file with a futimens() call. So it's safer
to set xattrs after times.
Upstream-Status: Submitted [https://github.com/libarchive/libarchive/pull/664]
Signed-off-by: Dmitry Rozhkov <dmitry.rozhkov at linux.intel.com>
---
.../0001-Set-xattrs-after-setting-times.patch | 54 ++++++++++++++++++++++
.../libarchive/libarchive_3.1.2.bb | 1 +
2 files changed, 55 insertions(+)
create mode 100644 meta/recipes-extended/libarchive/libarchive/0001-Set-xattrs-after-setting-times.patch
diff --git a/meta/recipes-extended/libarchive/libarchive/0001-Set-xattrs-after-setting-times.patch b/meta/recipes-extended/libarchive/libarchive/0001-Set-xattrs-after-setting-times.patch
new file mode 100644
index 0000000..beded5c
--- /dev/null
+++ b/meta/recipes-extended/libarchive/libarchive/0001-Set-xattrs-after-setting-times.patch
@@ -0,0 +1,54 @@
+From 545ded56095c570426fe102ff2192889681ea75c Mon Sep 17 00:00:00 2001
+From: Dmitry Rozhkov <dmitry.rozhkov at linux.intel.com>
+Date: Mon, 29 Feb 2016 14:38:25 +0200
+Subject: [PATCH] Set xattrs after setting times
+
+With Integrity Measurement Architecture (IMA) enabled Linux
+kernel the security.ima extended attribute gets overwritten
+when setting times on a file with a futimens() call. So it's safer
+to set xattrs after times.
+---
+ libarchive/archive_write_disk_posix.c | 21 +++++++++++----------
+ 1 file changed, 11 insertions(+), 10 deletions(-)
+
+diff --git a/libarchive/archive_write_disk_posix.c b/libarchive/archive_write_disk_posix.c
+index 0fc6193..27c9c1e 100644
+--- a/libarchive/archive_write_disk_posix.c
++++ b/libarchive/archive_write_disk_posix.c
+@@ -1620,16 +1620,6 @@ _archive_write_disk_finish_entry(struct archive *_a)
+ }
+
+ /*
+- * Security-related extended attributes (such as
+- * security.capability on Linux) have to be restored last,
+- * since they're implicitly removed by other file changes.
+- */
+- if (a->todo & TODO_XATTR) {
+- int r2 = set_xattrs(a);
+- if (r2 < ret) ret = r2;
+- }
+-
+- /*
+ * Some flags prevent file modification; they must be restored after
+ * file contents are written.
+ */
+@@ -1648,6 +1638,17 @@ _archive_write_disk_finish_entry(struct archive *_a)
+ }
+
+ /*
++ * Security-related extended attributes (such as
++ * security.capability or security.ima on Linux) have to be restored last,
++ * since they're implicitly removed by other file changes like setting
++ * times.
++ */
++ if (a->todo & TODO_XATTR) {
++ int r2 = set_xattrs(a);
++ if (r2 < ret) ret = r2;
++ }
++
++ /*
+ * Mac extended metadata includes ACLs.
+ */
+ if (a->todo & TODO_MAC_METADATA) {
+--
+2.5.0
diff --git a/meta/recipes-extended/libarchive/libarchive_3.1.2.bb b/meta/recipes-extended/libarchive/libarchive_3.1.2.bb
index 89c8faf..ed677ac 100644
--- a/meta/recipes-extended/libarchive/libarchive_3.1.2.bb
+++ b/meta/recipes-extended/libarchive/libarchive_3.1.2.bb
@@ -35,6 +35,7 @@ SRC_URI = "http://libarchive.org/downloads/libarchive-${PV}.tar.gz \
file://pkgconfig.patch \
file://libarchive-CVE-2015-2304.patch \
file://mkdir.patch \
+ file://0001-Set-xattrs-after-setting-times.patch \
"
SRC_URI[md5sum] = "efad5a503f66329bb9d2f4308b5de98a"
--
2.5.0
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