linux-kernel.vger.kernel.org archive mirror
 help / color / mirror / Atom feed
* WARNING: CPU: 1
@ 2020-09-27  8:38 syzbot
  2020-09-27  8:47 ` Dmitry Vyukov
  0 siblings, 1 reply; 6+ messages in thread
From: syzbot @ 2020-09-27  8:38 UTC (permalink / raw)
  To: linux-kernel, netdev, syzkaller-bugs

Hello,

syzbot found the following issue on:

HEAD commit:    748d1c8a Merge branch 'devlink-Use-nla_policy-to-validate-..
git tree:       net-next
console output: https://syzkaller.appspot.com/x/log.txt?x=13ac3ec3900000
kernel config:  https://syzkaller.appspot.com/x/.config?x=51fb40e67d1e3dec
dashboard link: https://syzkaller.appspot.com/bug?extid=3640e696903873858f7e
compiler:       gcc (GCC) 10.1.0-syz 20200507
syz repro:      https://syzkaller.appspot.com/x/repro.syz?x=1599be03900000
C reproducer:   https://syzkaller.appspot.com/x/repro.c?x=149fd44b900000

Bisection is inconclusive: the issue happens on the oldest tested release.

bisection log:  https://syzkaller.appspot.com/x/bisect.txt?x=1474aaad900000
final oops:     https://syzkaller.appspot.com/x/report.txt?x=1674aaad900000
console output: https://syzkaller.appspot.com/x/log.txt?x=1274aaad900000

IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+3640e696903873858f7e@syzkaller.appspotmail.com

------------[ cut here ]------------
WARNING: CPU: 1 


---
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.
For information about bisection process see: https://goo.gl/tpsmEJ#bisection
syzbot can test patches for this issue, for details see:
https://goo.gl/tpsmEJ#testing-patches

^ permalink raw reply	[flat|nested] 6+ messages in thread

* Re: WARNING: CPU: 1
  2020-09-27  8:38 WARNING: CPU: 1 syzbot
@ 2020-09-27  8:47 ` Dmitry Vyukov
  2020-09-28  9:30   ` Arend Van Spriel
  0 siblings, 1 reply; 6+ messages in thread
From: Dmitry Vyukov @ 2020-09-27  8:47 UTC (permalink / raw)
  To: syzbot; +Cc: LKML, netdev, syzkaller-bugs, Johannes Berg, linux-wireless

On Sun, Sep 27, 2020 at 10:38 AM syzbot
<syzbot+3640e696903873858f7e@syzkaller.appspotmail.com> wrote:
>
> Hello,
>
> syzbot found the following issue on:
>
> HEAD commit:    748d1c8a Merge branch 'devlink-Use-nla_policy-to-validate-..
> git tree:       net-next
> console output: https://syzkaller.appspot.com/x/log.txt?x=13ac3ec3900000
> kernel config:  https://syzkaller.appspot.com/x/.config?x=51fb40e67d1e3dec
> dashboard link: https://syzkaller.appspot.com/bug?extid=3640e696903873858f7e
> compiler:       gcc (GCC) 10.1.0-syz 20200507
> syz repro:      https://syzkaller.appspot.com/x/repro.syz?x=1599be03900000
> C reproducer:   https://syzkaller.appspot.com/x/repro.c?x=149fd44b900000

Based on the reproducer, this looks like some wireless bug.
+net/wireless maintainers.

> Bisection is inconclusive: the issue happens on the oldest tested release.
>
> bisection log:  https://syzkaller.appspot.com/x/bisect.txt?x=1474aaad900000
> final oops:     https://syzkaller.appspot.com/x/report.txt?x=1674aaad900000
> console output: https://syzkaller.appspot.com/x/log.txt?x=1274aaad900000
>
> IMPORTANT: if you fix the issue, please add the following tag to the commit:
> Reported-by: syzbot+3640e696903873858f7e@syzkaller.appspotmail.com
>
> ------------[ cut here ]------------
> WARNING: CPU: 1
>
>
> ---
> 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.
> For information about bisection process see: https://goo.gl/tpsmEJ#bisection
> syzbot can test patches for this issue, for details see:
> https://goo.gl/tpsmEJ#testing-patches
>
> --
> You received this message because you are subscribed to the Google Groups "syzkaller-bugs" group.
> To unsubscribe from this group and stop receiving emails from it, send an email to syzkaller-bugs+unsubscribe@googlegroups.com.
> To view this discussion on the web visit https://groups.google.com/d/msgid/syzkaller-bugs/000000000000bbdb3b05b0477890%40google.com.

^ permalink raw reply	[flat|nested] 6+ messages in thread

* Re: WARNING: CPU: 1
  2020-09-27  8:47 ` Dmitry Vyukov
@ 2020-09-28  9:30   ` Arend Van Spriel
  2020-09-28 10:04     ` Dmitry Vyukov
  0 siblings, 1 reply; 6+ messages in thread
From: Arend Van Spriel @ 2020-09-28  9:30 UTC (permalink / raw)
  To: Dmitry Vyukov, syzbot
  Cc: LKML, netdev, syzkaller-bugs, Johannes Berg, linux-wireless

[-- Attachment #1: Type: text/plain, Size: 1192 bytes --]

On 9/27/2020 10:47 AM, Dmitry Vyukov wrote:
> On Sun, Sep 27, 2020 at 10:38 AM syzbot
> <syzbot+3640e696903873858f7e@syzkaller.appspotmail.com> wrote:
>>
>> Hello,
>>
>> syzbot found the following issue on:
>>
>> HEAD commit:    748d1c8a Merge branch 'devlink-Use-nla_policy-to-validate-..
>> git tree:       net-next
>> console output: https://syzkaller.appspot.com/x/log.txt?x=13ac3ec3900000
>> kernel config:  https://syzkaller.appspot.com/x/.config?x=51fb40e67d1e3dec
>> dashboard link: https://syzkaller.appspot.com/bug?extid=3640e696903873858f7e
>> compiler:       gcc (GCC) 10.1.0-syz 20200507
>> syz repro:      https://syzkaller.appspot.com/x/repro.syz?x=1599be03900000
>> C reproducer:   https://syzkaller.appspot.com/x/repro.c?x=149fd44b900000
> 
> Based on the reproducer, this looks like some wireless bug.
> +net/wireless maintainers.

I don't think so looking at this part of the stacktrace:

[   51.814941]  [<ffffffff8465cc95>] macvlan_common_newlink+0xa15/0x1720
[   51.833542]  [<ffffffff84662548>] macvtap_newlink+0x128/0x230
[   51.858008]  [<ffffffff85b68bfe>] rtnl_newlink+0xe5e/0x1780
[   51.925885]  [<ffffffff85b5d32b>] rtnetlink_rcv_msg+0x22b/0xc20

Regards,
Arend

[-- Attachment #2: S/MIME Cryptographic Signature --]
[-- Type: application/pkcs7-signature, Size: 4176 bytes --]

^ permalink raw reply	[flat|nested] 6+ messages in thread

* Re: WARNING: CPU: 1
  2020-09-28  9:30   ` Arend Van Spriel
@ 2020-09-28 10:04     ` Dmitry Vyukov
  2020-09-28 10:46       ` Arend Van Spriel
  2021-01-05 10:18       ` Dmitry Vyukov
  0 siblings, 2 replies; 6+ messages in thread
From: Dmitry Vyukov @ 2020-09-28 10:04 UTC (permalink / raw)
  To: Arend Van Spriel
  Cc: syzbot, LKML, netdev, syzkaller-bugs, Johannes Berg, linux-wireless

On Mon, Sep 28, 2020 at 11:31 AM Arend Van Spriel
<arend.vanspriel@broadcom.com> wrote:
>
> On 9/27/2020 10:47 AM, Dmitry Vyukov wrote:
> > On Sun, Sep 27, 2020 at 10:38 AM syzbot
> > <syzbot+3640e696903873858f7e@syzkaller.appspotmail.com> wrote:
> >>
> >> Hello,
> >>
> >> syzbot found the following issue on:
> >>
> >> HEAD commit:    748d1c8a Merge branch 'devlink-Use-nla_policy-to-validate-..
> >> git tree:       net-next
> >> console output: https://syzkaller.appspot.com/x/log.txt?x=13ac3ec3900000
> >> kernel config:  https://syzkaller.appspot.com/x/.config?x=51fb40e67d1e3dec
> >> dashboard link: https://syzkaller.appspot.com/bug?extid=3640e696903873858f7e
> >> compiler:       gcc (GCC) 10.1.0-syz 20200507
> >> syz repro:      https://syzkaller.appspot.com/x/repro.syz?x=1599be03900000
> >> C reproducer:   https://syzkaller.appspot.com/x/repro.c?x=149fd44b900000
> >
> > Based on the reproducer, this looks like some wireless bug.
> > +net/wireless maintainers.
>
> I don't think so looking at this part of the stacktrace:
>
> [   51.814941]  [<ffffffff8465cc95>] macvlan_common_newlink+0xa15/0x1720
> [   51.833542]  [<ffffffff84662548>] macvtap_newlink+0x128/0x230
> [   51.858008]  [<ffffffff85b68bfe>] rtnl_newlink+0xe5e/0x1780
> [   51.925885]  [<ffffffff85b5d32b>] rtnetlink_rcv_msg+0x22b/0xc20
>
> Regards,
> Arend

That's the trace on the oldest release and the bisection was diverged
somewhere midway.
You may see this in the bisection log:
https://syzkaller.appspot.com/text?tag=Log&x=1474aaad900000

Initially it crashed with this warning:
all runs: crashed: WARNING in sta_info_insert_rcu

This function is in net/mac80211/sta_info.c.

^ permalink raw reply	[flat|nested] 6+ messages in thread

* Re: WARNING: CPU: 1
  2020-09-28 10:04     ` Dmitry Vyukov
@ 2020-09-28 10:46       ` Arend Van Spriel
  2021-01-05 10:18       ` Dmitry Vyukov
  1 sibling, 0 replies; 6+ messages in thread
From: Arend Van Spriel @ 2020-09-28 10:46 UTC (permalink / raw)
  To: Dmitry Vyukov
  Cc: syzbot, LKML, netdev, syzkaller-bugs, Johannes Berg, linux-wireless

[-- Attachment #1: Type: text/plain, Size: 1852 bytes --]

On 9/28/2020 12:04 PM, Dmitry Vyukov wrote:
> On Mon, Sep 28, 2020 at 11:31 AM Arend Van Spriel
> <arend.vanspriel@broadcom.com> wrote:
>>
>> On 9/27/2020 10:47 AM, Dmitry Vyukov wrote:
>>> On Sun, Sep 27, 2020 at 10:38 AM syzbot
>>> <syzbot+3640e696903873858f7e@syzkaller.appspotmail.com> wrote:
>>>>
>>>> Hello,
>>>>
>>>> syzbot found the following issue on:
>>>>
>>>> HEAD commit:    748d1c8a Merge branch 'devlink-Use-nla_policy-to-validate-..
>>>> git tree:       net-next
>>>> console output: https://syzkaller.appspot.com/x/log.txt?x=13ac3ec3900000
>>>> kernel config:  https://syzkaller.appspot.com/x/.config?x=51fb40e67d1e3dec
>>>> dashboard link: https://syzkaller.appspot.com/bug?extid=3640e696903873858f7e
>>>> compiler:       gcc (GCC) 10.1.0-syz 20200507
>>>> syz repro:      https://syzkaller.appspot.com/x/repro.syz?x=1599be03900000
>>>> C reproducer:   https://syzkaller.appspot.com/x/repro.c?x=149fd44b900000
>>>
>>> Based on the reproducer, this looks like some wireless bug.
>>> +net/wireless maintainers.
>>
>> I don't think so looking at this part of the stacktrace:
>>
>> [   51.814941]  [<ffffffff8465cc95>] macvlan_common_newlink+0xa15/0x1720
>> [   51.833542]  [<ffffffff84662548>] macvtap_newlink+0x128/0x230
>> [   51.858008]  [<ffffffff85b68bfe>] rtnl_newlink+0xe5e/0x1780
>> [   51.925885]  [<ffffffff85b5d32b>] rtnetlink_rcv_msg+0x22b/0xc20
>>
>> Regards,
>> Arend
> 
> That's the trace on the oldest release and the bisection was diverged
> somewhere midway.
> You may see this in the bisection log:
> https://syzkaller.appspot.com/text?tag=Log&x=1474aaad900000
> 
> Initially it crashed with this warning:
> all runs: crashed: WARNING in sta_info_insert_rcu
> 
> This function is in net/mac80211/sta_info.c.

I see. Thanks for the clarification. It was not really obvious where to 
dig for information.

Regards,
Arend

[-- Attachment #2: S/MIME Cryptographic Signature --]
[-- Type: application/pkcs7-signature, Size: 4176 bytes --]

^ permalink raw reply	[flat|nested] 6+ messages in thread

* Re: WARNING: CPU: 1
  2020-09-28 10:04     ` Dmitry Vyukov
  2020-09-28 10:46       ` Arend Van Spriel
@ 2021-01-05 10:18       ` Dmitry Vyukov
  1 sibling, 0 replies; 6+ messages in thread
From: Dmitry Vyukov @ 2021-01-05 10:18 UTC (permalink / raw)
  To: Arend Van Spriel
  Cc: syzbot, LKML, netdev, syzkaller-bugs, Johannes Berg, linux-wireless

On Mon, Sep 28, 2020 at 12:04 PM Dmitry Vyukov <dvyukov@google.com> wrote:
>
> On Mon, Sep 28, 2020 at 11:31 AM Arend Van Spriel
> <arend.vanspriel@broadcom.com> wrote:
> >
> > On 9/27/2020 10:47 AM, Dmitry Vyukov wrote:
> > > On Sun, Sep 27, 2020 at 10:38 AM syzbot
> > > <syzbot+3640e696903873858f7e@syzkaller.appspotmail.com> wrote:
> > >>
> > >> Hello,
> > >>
> > >> syzbot found the following issue on:
> > >>
> > >> HEAD commit:    748d1c8a Merge branch 'devlink-Use-nla_policy-to-validate-..
> > >> git tree:       net-next
> > >> console output: https://syzkaller.appspot.com/x/log.txt?x=13ac3ec3900000
> > >> kernel config:  https://syzkaller.appspot.com/x/.config?x=51fb40e67d1e3dec
> > >> dashboard link: https://syzkaller.appspot.com/bug?extid=3640e696903873858f7e
> > >> compiler:       gcc (GCC) 10.1.0-syz 20200507
> > >> syz repro:      https://syzkaller.appspot.com/x/repro.syz?x=1599be03900000
> > >> C reproducer:   https://syzkaller.appspot.com/x/repro.c?x=149fd44b900000
> > >
> > > Based on the reproducer, this looks like some wireless bug.
> > > +net/wireless maintainers.
> >
> > I don't think so looking at this part of the stacktrace:
> >
> > [   51.814941]  [<ffffffff8465cc95>] macvlan_common_newlink+0xa15/0x1720
> > [   51.833542]  [<ffffffff84662548>] macvtap_newlink+0x128/0x230
> > [   51.858008]  [<ffffffff85b68bfe>] rtnl_newlink+0xe5e/0x1780
> > [   51.925885]  [<ffffffff85b5d32b>] rtnetlink_rcv_msg+0x22b/0xc20
> >
> > Regards,
> > Arend
>
> That's the trace on the oldest release and the bisection was diverged
> somewhere midway.
> You may see this in the bisection log:
> https://syzkaller.appspot.com/text?tag=Log&x=1474aaad900000
>
> Initially it crashed with this warning:
> all runs: crashed: WARNING in sta_info_insert_rcu
>
> This function is in net/mac80211/sta_info.c.

#syz dup: WARNING in sta_info_insert_rcu

^ permalink raw reply	[flat|nested] 6+ messages in thread

end of thread, other threads:[~2021-01-05 10:19 UTC | newest]

Thread overview: 6+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2020-09-27  8:38 WARNING: CPU: 1 syzbot
2020-09-27  8:47 ` Dmitry Vyukov
2020-09-28  9:30   ` Arend Van Spriel
2020-09-28 10:04     ` Dmitry Vyukov
2020-09-28 10:46       ` Arend Van Spriel
2021-01-05 10:18       ` Dmitry Vyukov

This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).