xen-netback: Fix releasing frag_list skbs in error path
authorZoltan Kiss <zoltan.kiss@citrix.com>
Fri, 18 Jul 2014 18:08:03 +0000 (19:08 +0100)
committerDavid S. Miller <davem@davemloft.net>
Mon, 21 Jul 2014 03:56:06 +0000 (20:56 -0700)
commitb42cc6e421e7bf74e545483aa34b99d2a2ca6d3a
tree960054d039652e384e220ede40ea9931cd9a202e
parent1a998d3e6bc1e44f4c0bc7509bdedef8ed3845ec
xen-netback: Fix releasing frag_list skbs in error path

When the grant operations failed, the skb is freed up eventually, and it tries
to release the frags, if there is any. For the main skb nr_frags is set to 0 to
avoid this, but on the frag_list it iterates through the frags array, and tries
to call put_page on the page pointer which contains garbage at that time.

Signed-off-by: Zoltan Kiss <zoltan.kiss@citrix.com>
Reported-by: Armin Zentai <armin.zentai@ezit.hu>
Cc: netdev@vger.kernel.org
Cc: linux-kernel@vger.kernel.org
Cc: xen-devel@lists.xenproject.org
Signed-off-by: David S. Miller <davem@davemloft.net>
drivers/net/xen-netback/netback.c