Re: BUG: INFO: trying to register non-static key in call_timer_fn

[Xingyu Li]

Without exact kernel version, config and reproduction
instructions this is not really helpful.

It is on Linux 6.10. Here is the config:
https://gist.github.com/TomAPU/64f5db0fe976a3e94a6dd2b621887cdd
It is compiled by clang version 14.0.0
(https://github.com/llvm/llvm-project.git
329fda39c507e8740978d10458451dcdb21563be).

On Mon, Sep 2, 2024 at 2:26 AM Thomas Gleixner <tglx@xxxxxxxxxxxxx> wrote:
>
> On Wed, Aug 28 2024 at 17:16, Xingyu Li wrote:
> > We found a bug in Linux 6.10 using syzkaller. It is possibly a
> > corrupted list  bug.
> > The reproducer is
> > https://gist.github.com/freexxxyyy/4c465c7d81957779d8bdea44f6cb8977
>
> Again. Without exact kernel version, config and reproduction
> instructions this is not really helpful.
>
> > The bug report is:
> >
> > Syzkaller hit 'INFO: trying to register non-static key in call_timer_fn' bug.
> >
> > INFO: trying to register non-static key.
> > The code is fine but needs lockdep annotation, or maybe
> > you didn't initialize this object before use?
>
> That's simply not possible.
>
> > list_add corruption. prev is NULL.
>
> > Call Trace:
> >  <IRQ>
> >  __list_add_valid include/linux/list.h:88 [inline]
> >  __list_add include/linux/list.h:150 [inline]
> >  list_add_tail include/linux/list.h:183 [inline]
> >  insert_work+0x114/0x320 kernel/workqueue.c:2212
> >  __queue_work+0xb61/0xce0 kernel/workqueue.c:2360
> >  queue_work_on+0x18a/0x2d0 kernel/workqueue.c:2411
>
> So that looks similar to the other unexplainable report
>
>   https://lore.kernel.org/all/CALAgD-7TsMdA7rjxfpheXc=MNqikEXY9TZNxJt4z9vm6Yfs5qQ@xxxxxxxxxxxxxx
>
> and smells like memory corruption of some sort, which then triggers
> non-sensical issues in other code.
>
> Thanks,
>
>         tglx



-- 
Yours sincerely,
Xingyu