qemu: net: CVE-2015-5278

Avoid infinite loop when receiving packets.

Reference:
https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2015-5278

Reference to upstream patch:
http://git.qemu.org/?p=qemu.git;a=commit;h=5a1ccdfe44946e726b4c6fda8a4493b3931a68c1

Signed-off-by: Sona Sarmadi <sona.sarmadi@enea.com>
Signed-off-by: Tudor Florea <tudor.florea@enea.com>

1 files changed, 40 insertions, 0 deletions

diff --git a/meta/recipes-devtools/qemu/qemu/net-CVE-2015-5278.patch b/meta/recipes-devtools/qemu/qemu/net-CVE-2015-5278.patch
new file mode 100644
index 0000000000..5b22a23c18
--- /dev/null
+++ b/meta/recipes-devtools/qemu/qemu/net-CVE-2015-5278.patch
@@ -0,0 +1,40 @@
+From 5a1ccdfe44946e726b4c6fda8a4493b3931a68c1 Mon Sep 17 00:00:00 2001
+From: P J P <pjp@fedoraproject.org>
+Date: Tue, 15 Sep 2015 16:46:59 +0530
+Subject: net: avoid infinite loop when receiving packets(CVE-2015-5278)
+
+Ne2000 NIC uses ring buffer of NE2000_MEM_SIZE(49152)
+bytes to process network packets. While receiving packets
+via ne2000_receive() routine, a local 'index' variable
+could exceed the ring buffer size, leading to an infinite
+loop situation.
+
+CVE: CVE-2015-5278
+Upstream-Status: Backport
+
+Reported-by: Qinghao Tang <luodalongde@gmail.com>
+Signed-off-by: P J P <pjp@fedoraproject.org>
+Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
+(cherry picked from commit 737d2b3c41d59eb8f94ab7eb419b957938f24943)
+Signed-off-by: Michael Roth <mdroth@linux.vnet.ibm.com>
+Signed-off-by: Sona Sarmadi <sona.sarmadi@enea.com>
+---
+ hw/net/ne2000.c | 2 +-
+ 1 file changed, 1 insertion(+), 1 deletion(-)
+
+diff --git a/hw/net/ne2000.c b/hw/net/ne2000.c
+index 9278571..2bdb4c9 100644
+--- a/hw/net/ne2000.c
++++ b/hw/net/ne2000.c
+@@ -256,7 +256,7 @@ ssize_t ne2000_receive(NetClientState *nc, const uint8_t *buf, size_t size_)
+         if (index <= s->stop)
+             avail = s->stop - index;
+         else
+-            avail = 0;
++            break;
+         len = size;
+         if (len > avail)
+             len = avail;
+-- 
+1.9.1
+