File 0041-net-mipsnet-check-packet-length-aga.patch of Package qemu

Overview Repositories Revisions Requests Users Attributes Meta

File 0041-net-mipsnet-check-packet-length-aga.patch of Package qemu (Revision c2f1cab5bbf6ea2176a55fc85e33f80f)

Currently displaying revision c2f1cab5bbf6ea2176a55fc85e33f80f , Show latest

From a4cae4158cc271ed4d55bc2e237030022f8edc16 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 740cd98..cf8b823 100644
--- a/hw/net/mipsnet.c
+++ b/hw/net/mipsnet.c
@@ -83,6 +83,9 @@ static ssize_t mipsnet_receive(NetClientState *nc, const uint8_t *buf, size_t si
     if (!mipsnet_can_receive(nc))
         return 0;
 
+    if (size >= sizeof(s->rx_buffer)) {
+        return 0;
+    }
     s->busy = 1;
 
     /* Just accept everything. */

Places

File 0041-net-mipsnet-check-packet-length-aga.patch of Package qemu (Revision c2f1cab5bbf6ea2176a55fc85e33f80f)

Places