File 0092-net-mipsnet-check-packet-length-aga.patch of Package qemu.3274

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File 0092-net-mipsnet-check-packet-length-aga.patch of Package qemu.3274

From 529db6be849fb8f24e381223a2a487c0c827f2e4 Mon Sep 17 00:00:00 2001
From: Prasad J Pandit <pjp@fedoraproject.org>
Date: Thu, 7 Apr 2016 04:27:00 -0600
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>
[BR: BSC#975136 CVE-2016-4002]
Signed-off-by: Bruce Rogers <brogers@suse.com>
---
 hw/net/mipsnet.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/hw/net/mipsnet.c b/hw/net/mipsnet.c
index c813e0c..e0973f2 100644
--- a/hw/net/mipsnet.c
+++ b/hw/net/mipsnet.c
@@ -82,6 +82,9 @@ static ssize_t mipsnet_receive(NetClientState *nc, const uint8_t *buf, size_t si
     if (!mipsnet_can_receive(nc))
         return -1;
 
+    if (size >= sizeof(s->rx_buffer)) {
+        return 0;
+    }
     s->busy = 1;
 
     /* Just accept everything. */

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File 0092-net-mipsnet-check-packet-length-aga.patch of Package qemu.3274

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