lkml.org 
[lkml]   [2022]   [May]   [12]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
From
SubjectRe: [syzbot] UBSAN: shift-out-of-bounds in tcf_pedit_init
On Thu, 12 May 2022 14:19:51 -0700 Eric Dumazet wrote:
> On Thu, May 12, 2022 at 2:18 PM syzbot
> > This report is generated by a bot. It may contain errors.
> > See https://goo.gl/tpsmEJ for more information about syzbot.
> > syzbot engineers can be reached at syzkaller@googlegroups.com.
> >
> > syzbot will keep track of this issue. See:
> > https://goo.gl/tpsmEJ#status for how to communicate with syzbot.
> > syzbot can test patches for this issue, for details see:
> > https://goo.gl/tpsmEJ#testing-patches
>
> As mentioned earlier, this came with
>
> commit 8b796475fd7882663a870456466a4fb315cc1bd6
> Author: Paolo Abeni <pabeni@redhat.com>
> Date: Tue May 10 16:57:34 2022 +0200
>
> net/sched: act_pedit: really ensure the skb is writable

Came in as in new stack trace for an old/existing bug, right?
Nothing checks the shift so it'd have already tripped UBSAN
later on in tcf_pedit_act(), anyway.

\
 
 \ /
  Last update: 2022-05-13 00:52    [W:0.065 / U:0.576 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site