lkml.org 
[lkml]   [2021]   [Oct]   [18]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
From
SubjectRe: [syzbot] BUG: corrupted list in netif_napi_add
Date
On Mon 18 Oct 2021 at 18:42, Jakub Kicinski <kuba@kernel.org> wrote:
> On Mon, 18 Oct 2021 17:04:19 +0300 Vlad Buslov wrote:
>> We got a use-after-free with very similar trace [0] during nightly
>> regression. The issue happens when ip link up/down state is flipped
>> several times in loop and doesn't reproduce for me manually. The fact
>> that it didn't reproduce for me after running test ten times suggests
>> that it is either very hard to reproduce or that it is a result of some
>> interaction between several tests in our suite.
>>
>> [0]:
>>
>> [ 3187.779569] mlx5_core 0000:08:00.0 enp8s0f0: Link up
>> [ 3187.890694] ==================================================================
>> [ 3187.892518] BUG: KASAN: use-after-free in __list_add_valid+0xc3/0xf0
>> [ 3187.894132] Read of size 8 at addr ffff8881150b3fb8 by task ip/119618
>
> Hm, not sure how similar it is. This one looks like channel was freed
> without deleting NAPI. Do you have list debug enabled?

Yes, CONFIG_DEBUG_LIST is enabled.

\
 
 \ /
  Last update: 2021-10-18 18:14    [W:0.114 / U:0.008 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site