[syzbot] Monthly net report (Nov 2023)

[syzbot] Monthly net report (Nov 2023)

[syzbot]

Hello net maintainers/developers,

This is a 31-day syzbot report for the net subsystem.
All related reports/information can be found at:
https://syzkaller.appspot.com/upstream/s/net

During the period, 5 new issues were detected and 13 were fixed.
In total, 77 issues are still open and 1358 have been fixed so far.

Some of the still happening issues:

Ref  Crashes Repro Title
<1>  3878    Yes   KMSAN: uninit-value in eth_type_trans (2)
                   https://syzkaller.appspot.com/bug?extid=0901d0cc75c3d716a3a3
<2>  892     Yes   possible deadlock in __dev_queue_xmit (3)
                   https://syzkaller.appspot.com/bug?extid=3b165dac15094065651e
<3>  860     Yes   INFO: task hung in switchdev_deferred_process_work (2)
                   https://syzkaller.appspot.com/bug?extid=8ecc009e206a956ab317
<4>  590     Yes   INFO: task hung in rtnetlink_rcv_msg
                   https://syzkaller.appspot.com/bug?extid=8218a8a0ff60c19b8eae
<5>  390     Yes   WARNING in kcm_write_msgs
                   https://syzkaller.appspot.com/bug?extid=52624bdfbf2746d37d70
<6>  373     Yes   INFO: rcu detected stall in corrupted (4)
                   https://syzkaller.appspot.com/bug?extid=aa7d098bd6fa788fae8e
<7>  249     Yes   INFO: rcu detected stall in tc_modify_qdisc
                   https://syzkaller.appspot.com/bug?extid=9f78d5c664a8c33f4cce
<8>  240     Yes   BUG: corrupted list in p9_fd_cancelled (2)
                   https://syzkaller.appspot.com/bug?extid=1d26c4ed77bc6c5ed5e6
<9>  172     No    INFO: task hung in linkwatch_event (3)
                   https://syzkaller.appspot.com/bug?extid=d4b2f8282f84f54e87a1
<10> 154     Yes   WARNING in print_bfs_bug (2)
                   https://syzkaller.appspot.com/bug?extid=630f83b42d801d922b8b

---
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Re: [syzbot] Monthly net report (Nov 2023)

[Jamal Hadi Salim]

On Thu, Nov 23, 2023 at 8:12 AM syzbot
<syzbot+listaba4d9d9775b9482e752@syzkaller.appspotmail.com> wrote:
>
> Hello net maintainers/developers,
>
> This is a 31-day syzbot report for the net subsystem.
> All related reports/information can be found at:
> https://syzkaller.appspot.com/upstream/s/net
>

Hi,
Could you please Cc the stakeholders for each issue (especially when
there is a reproducer)? Not everybody reads every single message that
shows up in the kernel.

cheers,
jamal

> During the period, 5 new issues were detected and 13 were fixed.
> In total, 77 issues are still open and 1358 have been fixed so far.
>
> Some of the still happening issues:
>
> Ref  Crashes Repro Title
> <1>  3878    Yes   KMSAN: uninit-value in eth_type_trans (2)
>                    https://syzkaller.appspot.com/bug?extid=0901d0cc75c3d716a3a3
> <2>  892     Yes   possible deadlock in __dev_queue_xmit (3)
>                    https://syzkaller.appspot.com/bug?extid=3b165dac15094065651e
> <3>  860     Yes   INFO: task hung in switchdev_deferred_process_work (2)
>                    https://syzkaller.appspot.com/bug?extid=8ecc009e206a956ab317
> <4>  590     Yes   INFO: task hung in rtnetlink_rcv_msg
>                    https://syzkaller.appspot.com/bug?extid=8218a8a0ff60c19b8eae
> <5>  390     Yes   WARNING in kcm_write_msgs
>                    https://syzkaller.appspot.com/bug?extid=52624bdfbf2746d37d70
> <6>  373     Yes   INFO: rcu detected stall in corrupted (4)
>                    https://syzkaller.appspot.com/bug?extid=aa7d098bd6fa788fae8e
> <7>  249     Yes   INFO: rcu detected stall in tc_modify_qdisc
>                    https://syzkaller.appspot.com/bug?extid=9f78d5c664a8c33f4cce
> <8>  240     Yes   BUG: corrupted list in p9_fd_cancelled (2)
>                    https://syzkaller.appspot.com/bug?extid=1d26c4ed77bc6c5ed5e6
> <9>  172     No    INFO: task hung in linkwatch_event (3)
>                    https://syzkaller.appspot.com/bug?extid=d4b2f8282f84f54e87a1
> <10> 154     Yes   WARNING in print_bfs_bug (2)
>                    https://syzkaller.appspot.com/bug?extid=630f83b42d801d922b8b
>
> ---
> 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.
>
> To disable reminders for individual bugs, reply with the following command:
> #syz set <Ref> no-reminders
>
> To change bug's subsystems, reply with:
> #syz set <Ref> subsystems: new-subsystem
>
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>

Re: [syzbot] Monthly net report (Nov 2023)

[Aleksandr Nogikh]

Hi Jamal,

This sounds interesting, thanks for the suggestion!

It would be a lot of emails though, so maybe we could randomly pick a
few of them each time.
I've filed https://github.com/google/syzkaller/issues/4369

-- 
Aleksandr

On Thu, Nov 23, 2023 at 3:03 PM Jamal Hadi Salim <jhs@mojatatu.com> wrote:
>
> On Thu, Nov 23, 2023 at 8:12 AM syzbot
> <syzbot+listaba4d9d9775b9482e752@syzkaller.appspotmail.com> wrote:
> >
> > Hello net maintainers/developers,
> >
> > This is a 31-day syzbot report for the net subsystem.
> > All related reports/information can be found at:
> > https://syzkaller.appspot.com/upstream/s/net
> >
>
> Hi,
> Could you please Cc the stakeholders for each issue (especially when
> there is a reproducer)? Not everybody reads every single message that
> shows up in the kernel.
>
> cheers,
> jamal
>
> > During the period, 5 new issues were detected and 13 were fixed.
> > In total, 77 issues are still open and 1358 have been fixed so far.
> >
> > Some of the still happening issues:
> >
> > Ref  Crashes Repro Title
> > <1>  3878    Yes   KMSAN: uninit-value in eth_type_trans (2)
> >                    https://syzkaller.appspot.com/bug?extid=0901d0cc75c3d716a3a3
> > <2>  892     Yes   possible deadlock in __dev_queue_xmit (3)
> >                    https://syzkaller.appspot.com/bug?extid=3b165dac15094065651e
> > <3>  860     Yes   INFO: task hung in switchdev_deferred_process_work (2)
> >                    https://syzkaller.appspot.com/bug?extid=8ecc009e206a956ab317
> > <4>  590     Yes   INFO: task hung in rtnetlink_rcv_msg
> >                    https://syzkaller.appspot.com/bug?extid=8218a8a0ff60c19b8eae
> > <5>  390     Yes   WARNING in kcm_write_msgs
> >                    https://syzkaller.appspot.com/bug?extid=52624bdfbf2746d37d70
> > <6>  373     Yes   INFO: rcu detected stall in corrupted (4)
> >                    https://syzkaller.appspot.com/bug?extid=aa7d098bd6fa788fae8e
> > <7>  249     Yes   INFO: rcu detected stall in tc_modify_qdisc
> >                    https://syzkaller.appspot.com/bug?extid=9f78d5c664a8c33f4cce
> > <8>  240     Yes   BUG: corrupted list in p9_fd_cancelled (2)
> >                    https://syzkaller.appspot.com/bug?extid=1d26c4ed77bc6c5ed5e6
> > <9>  172     No    INFO: task hung in linkwatch_event (3)
> >                    https://syzkaller.appspot.com/bug?extid=d4b2f8282f84f54e87a1
> > <10> 154     Yes   WARNING in print_bfs_bug (2)
> >                    https://syzkaller.appspot.com/bug?extid=630f83b42d801d922b8b
> >
> > ---
> > 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.
> >
> > To disable reminders for individual bugs, reply with the following command:
> > #syz set <Ref> no-reminders
> >
> > To change bug's subsystems, reply with:
> > #syz set <Ref> subsystems: new-subsystem
> >
> > You may send multiple commands in a single email message.
> >
>
> --
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Re: [syzbot] Monthly net report (Nov 2023)

[Jakub Kicinski]

On Thu, 23 Nov 2023 05:12:23 -0800 syzbot wrote:
> <8>  240     Yes   BUG: corrupted list in p9_fd_cancelled (2)
>                    https://syzkaller.appspot.com/bug?extid=1d26c4ed77bc6c5ed5e6

One nit - p9 is not really net.

Thanks again for restarting the reports!

Re: [syzbot] Monthly net report (Nov 2023)

[Aleksandr Nogikh]

On Sat, Nov 25, 2023 at 3:28 AM Jakub Kicinski <kuba@kernel.org> wrote:
>
> On Thu, 23 Nov 2023 05:12:23 -0800 syzbot wrote:
> > <8>  240     Yes   BUG: corrupted list in p9_fd_cancelled (2)
> >                    https://syzkaller.appspot.com/bug?extid=1d26c4ed77bc6c5ed5e6
>
> One nit - p9 is not really net.

At least it's not reflected in MAINTAINERS:

$ ./scripts/get_maintainer.pl --nom --nor ./net/9p/
v9fs@lists.linux.dev (open list:9P FILE SYSTEM)
netdev@vger.kernel.org (open list:NETWORKING [GENERAL])
linux-kernel@vger.kernel.org (open list)

Maybe it could be worth it to add "X: net/9p/" to "NETWORKING [GENERAL]"?
Syzbot would then eventually also pick up the change.

-- 
Aleksandr

>
> Thanks again for restarting the reports!
>

Re: [syzbot] Monthly net report (Nov 2023)

[Jakub Kicinski]

On Tue, 28 Nov 2023 15:54:00 +0100 Aleksandr Nogikh wrote:
> Maybe it could be worth it to add "X: net/9p/" to "NETWORKING [GENERAL]"?
> Syzbot would then eventually also pick up the change.

Good point, sent.