Re: [PATCH] batman-adv: fix DAT purge use-after-free on teardown

I was running a modified syzkaller locally and the crash came from
that setup. I've since lost the original log, and looking back, I may
have confused an issue in my tooling with a kernel bug. I should have
verified more carefully before sending this. Sorry for the confusion.

Soowan Park

2026년 5월 26일 (화) 오후 11:18, Sven Eckelmann <[email protected]>님이 작성:
>
> On Tuesday, 26 May 2026 15:56:58 CEST ­박수완 / 학생 / 컴퓨터공학부 wrote:
> > Hi Sven,
> >
> > You're right. I re-examined __cancel_work_sync() and confirmed that it
> > internally disables the work before flushing, so the re-queue race I
> > described does not exist. I'll withdraw this patch.
> >
> > Thanks for the review.
>
> But you said that this was reported by syzkaller. I can't find the report in
> the official list [1]. I am guessing you have a reproducer in a private
> instance and tested with it. And if you tested your patch with it, you have
> found that your patch fixes it, right?
>
> Can you give us more information about this to let us figure out what is
> actually going on?
>
> Regards,
>         Sven
>
> [1] https://syzkaller.appspot.com/upstream/s/batman