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authorSona Sarmadi <sona.sarmadi@enea.com>2015-08-18 10:45:56 +0200
committerRichard Purdie <richard.purdie@linuxfoundation.org>2015-09-01 21:28:00 +0100
commit0bd4b0c7ede8a52559e4bf05085a3f0d46a0a280 (patch)
treef2b3a345b77256295292d97c48f816e958f98a09
parent18a01db3f2430095a4e6966aed5afd738dbc112e (diff)
downloadopenembedded-core-0bd4b0c7ede8a52559e4bf05085a3f0d46a0a280.zip
openembedded-core-0bd4b0c7ede8a52559e4bf05085a3f0d46a0a280.tar.gz
openembedded-core-0bd4b0c7ede8a52559e4bf05085a3f0d46a0a280.tar.bz2
qemu: CVE-2014-7840
Fixes insufficient parameter validation during ram load Reference http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2014-7840 Upstream commit: http://git.qemu.org/?p=qemu.git;a=commit; h=0be839a2701369f669532ea5884c15bead1c6e08 Signed-off-by: Sona Sarmadi <sona.sarmadi@enea.com> Signed-off-by: Armin Kuster <akuster808@gmail.com>
-rw-r--r--meta/recipes-devtools/qemu/qemu/CVE-2014-7840.patch57
-rw-r--r--meta/recipes-devtools/qemu/qemu_2.1.0.bb1
2 files changed, 58 insertions, 0 deletions
diff --git a/meta/recipes-devtools/qemu/qemu/CVE-2014-7840.patch b/meta/recipes-devtools/qemu/qemu/CVE-2014-7840.patch
new file mode 100644
index 0000000..4f992ba
--- /dev/null
+++ b/meta/recipes-devtools/qemu/qemu/CVE-2014-7840.patch
@@ -0,0 +1,57 @@
+From 0be839a2701369f669532ea5884c15bead1c6e08 Mon Sep 17 00:00:00 2001
+From: "Michael S. Tsirkin" <mst@redhat.com>
+Date: Wed, 12 Nov 2014 11:44:39 +0200
+Subject: [PATCH] migration: fix parameter validation on ram load
+
+During migration, the values read from migration stream during ram load
+are not validated. Especially offset in host_from_stream_offset() and
+also the length of the writes in the callers of said function.
+
+To fix this, we need to make sure that the [offset, offset + length]
+range fits into one of the allocated memory regions.
+
+Validating addr < len should be sufficient since data seems to always be
+managed in TARGET_PAGE_SIZE chunks.
+
+Fixes: CVE-2014-7840
+
+Upstream-Status: Backport
+
+Note: follow-up patches add extra checks on each block->host access.
+
+Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
+Reviewed-by: Paolo Bonzini <pbonzini@redhat.com>
+Reviewed-by: Dr. David Alan Gilbert <dgilbert@redhat.com>
+Signed-off-by: Amit Shah <amit.shah@redhat.com>
+Signed-off-by: Sona Sarmadi <sona.sarmadi@enea.com>
+---
+ arch_init.c | 5 +++--
+ 1 file changed, 3 insertions(+), 2 deletions(-)
+
+diff --git a/arch_init.c b/arch_init.c
+index 88a5ba0..593a990 100644
+--- a/arch_init.c
++++ b/arch_init.c
+@@ -1006,7 +1006,7 @@ static inline void *host_from_stream_offset(QEMUFile *f,
+ uint8_t len;
+
+ if (flags & RAM_SAVE_FLAG_CONTINUE) {
+- if (!block) {
++ if (!block || block->length <= offset) {
+ error_report("Ack, bad migration stream!");
+ return NULL;
+ }
+@@ -1019,8 +1019,9 @@ static inline void *host_from_stream_offset(QEMUFile *f,
+ id[len] = 0;
+
+ QTAILQ_FOREACH(block, &ram_list.blocks, next) {
+- if (!strncmp(id, block->idstr, sizeof(id)))
++ if (!strncmp(id, block->idstr, sizeof(id)) && block->length > offset) {
+ return memory_region_get_ram_ptr(block->mr) + offset;
++ }
+ }
+
+ error_report("Can't find block %s!", id);
+--
+1.9.1
+
diff --git a/meta/recipes-devtools/qemu/qemu_2.1.0.bb b/meta/recipes-devtools/qemu/qemu_2.1.0.bb
index d0ce744..5e5ecf0 100644
--- a/meta/recipes-devtools/qemu/qemu_2.1.0.bb
+++ b/meta/recipes-devtools/qemu/qemu_2.1.0.bb
@@ -8,6 +8,7 @@ SRC_URI += "file://configure-fix-Darwin-target-detection.patch \
file://Qemu-Arm-versatilepb-Add-memory-size-checking.patch \
file://0001-Back-porting-security-fix-CVE-2014-5388.patch \
file://qemu-CVE-2015-3456.patch \
+ file://CVE-2014-7840.patch \
"
SRC_URI_prepend = "http://wiki.qemu-project.org/download/${BP}.tar.bz2"
SRC_URI[md5sum] = "6726977292b448cbc7f89998fac6983b"