qemu: Security fix for CVE-2016-4002

affects qemu < 2.6.0

(From OE-Core rev: 6d7c10eae8b23a71eee6d59baab42d98d8fb7ff8)

Signed-off-by: Armin Kuster <akuster@mvista.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

1 files changed, 39 insertions, 0 deletions

diff --git a/meta/recipes-devtools/qemu/qemu/CVE-2016-4002.patch b/meta/recipes-devtools/qemu/qemu/CVE-2016-4002.patch
new file mode 100644
index 0000000000..69c11e27d9
--- /dev/null
+++ b/meta/recipes-devtools/qemu/qemu/CVE-2016-4002.patch
@@ -0,0 +1,39 @@
+From 7a2c32ec06533c54ddaf70136bfbd89eeaf6db16 Mon Sep 17 00:00:00 2001
+From: Prasad J Pandit <pjp@fedoraproject.org>
+Date: Thu, 7 Apr 2016 15:56:02 +0530
+Subject: [PATCH] net: mipsnet: check packet length against buffer
+
+When receiving packets over MIPSnet network device, it uses
+receive buffer of size 1514 bytes. In case the controller
+accepts large(MTU) packets, it could lead to memory corruption.
+Add check to avoid it.
+
+Reported by: Oleksandr Bazhaniuk <oleksandr.bazhaniuk@intel.com>
+Signed-off-by: Prasad J Pandit <pjp@fedoraproject.org>
+Signed-off-by: Jason Wang <jasowang@redhat.com>
+
+(cherry picked from commit 3af9187fc6caaf415ab9c0c6d92c9678f65cb17f)
+Signed-off-by: Michael Roth <mdroth@linux.vnet.ibm.com>
+
+Upstream-Status: Backport
+CVE: CVE-2016-4002
+Signed-off-by: Armin Kuster <akuster@mvista.com>
+
+---
+ hw/net/mipsnet.c | 3 +++
+ 1 file changed, 3 insertions(+)
+
+Index: qemu-2.4.0/hw/net/mipsnet.c
+===================================================================
+--- qemu-2.4.0.orig/hw/net/mipsnet.c
++++ qemu-2.4.0/hw/net/mipsnet.c
+@@ -82,6 +82,9 @@ static ssize_t mipsnet_receive(NetClient
+     if (!mipsnet_can_receive(nc))
+         return 0;
+ 
++    if (size >= sizeof(s->rx_buffer)) {
++        return 0;
++    }
+     s->busy = 1;
+ 
+     /* Just accept everything. */