Re: KASAN: stack-out-of-bounds Read in xfrm_state_find (3)

Hi Steffen,

On Fri, Dec 01, 2017 at 08:27:43AM +0100, Steffen Klassert wrote:

On Wed, Nov 22, 2017 at 08:05:00AM -0800, syzbot wrote:

quoted

syzkaller has found reproducer for the following crash on
0c86a6bd85ff0629cd2c5141027fc1c8bb6cde9c
git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next.git/master
compiler: gcc (GCC) 7.1.1 20170620
.config is attached
Raw console output is attached.
C reproducer is attached
syzkaller reproducer is attached. See https://goo.gl/kgGztJ
for information about syzkaller reproducers


BUG: KASAN: stack-out-of-bounds in xfrm_state_find+0x30fc/0x3230
net/xfrm/xfrm_state.c:1051
Read of size 4 at addr ffff8801ccaa7af8 by task syzkaller231684/3045

The patch below should fix this. I plan to apply it to the ipsec tree
after some advanced testing.

Subject: [PATCH RFC] xfrm: Fix stack-out-of-bounds with misconfigured transport
 mode policies.

Are you still planning to apply this?  syzbot is still hitting this bug.

Eric