File 0088-net-ignore-packet-size-greater-than.patch of Package qemu.10251
From 707b1fbf7efc84c1b7bbdbeac269b6ebabddaa7c Mon Sep 17 00:00:00 2001
From: Jason Wang <jasowang@redhat.com>
Date: Wed, 30 May 2018 13:16:36 +0800
Subject: [PATCH] net: ignore packet size greater than INT_MAX
There should not be a reason for passing a packet size greater than
INT_MAX. It's usually a hint of bug somewhere, so ignore packet size
greater than INT_MAX in qemu_deliver_packet_iov()
CC: qemu-stable@nongnu.org
Reported-by: Daniel Shapira <daniel@twistlock.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Jason Wang <jasowang@redhat.com>
(cherry picked from commit 1592a9947036d60dde5404204a5d45975133caf5)
[LD: BSC#1111006 CVE-2018-17963]
Signed-off-by: Larry Dewey <ldewey@suse.com>
---
net/net.c | 7 ++++++-
1 file changed, 6 insertions(+), 1 deletion(-)
diff --git a/net/net.c b/net/net.c
index 0719358d03..14cbb9e1ed 100644
--- a/net/net.c
+++ b/net/net.c
@@ -729,10 +729,15 @@ ssize_t qemu_deliver_packet_iov(NetClientState *sender,
void *opaque)
{
NetClientState *nc = opaque;
+ size_t size = iov_size(iov, iovcnt);
int ret;
+ if (size > INT_MAX) {
+ return size;
+ }
+
if (nc->link_down) {
- return iov_size(iov, iovcnt);
+ return size;
}
if (nc->receive_disabled) {