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SubjectRe: WARNING in alloc_page_buffers
On Sat, Mar 21, 2020 at 9:07 PM Andrew Morton <akpm@linux-foundation.org> wrote:
>
> On Sat, 21 Mar 2020 13:00:18 -0700 syzbot <syzbot+0985c7ea18137bf0c4ca@syzkaller.appspotmail.com> wrote:
>
> > syzbot found the following crash on:
> >
> > HEAD commit: 770fbb32 Add linux-next specific files for 20200228
>
> That's nearly four weeks ago?

Yes, syzbot did not get any kernel build that boots on linux-next for
the past 3 weeks at least, it either does not build or does not boot:
https://syzkaller.appspot.com/bug?id=0b5a478272f2f91e39199ea606c13f2bc945ac1e
https://syzkaller.appspot.com/bug?id=738c77b954cc37a5b9749c248b33e5d383a1c949
https://syzkaller.appspot.com/bug?id=d085d2f9d904d7e8f4f6f4ec2762d817f58f448d
https://syzkaller.appspot.com/bug?id=ba5d229611dfff6ce6f7470d7548cd0487292104
https://syzkaller.appspot.com/bug?id=f13120b0dfe367862cd8de7bcca9d43a566e5543
The current breakage was reported more than a week ago. Maybe there
are more breakages piled up before behind that one now...
It tries on every commit now.




> > git tree: linux-next
> > console output: https://syzkaller.appspot.com/x/log.txt?x=13507489e00000
> > kernel config: https://syzkaller.appspot.com/x/.config?x=576314276bce4ad5
> > dashboard link: https://syzkaller.appspot.com/bug?extid=0985c7ea18137bf0c4ca
> > compiler: gcc (GCC) 9.0.0 20181231 (experimental)
> > syz repro: https://syzkaller.appspot.com/x/repro.syz?x=15b970e5e00000
> > C reproducer: https://syzkaller.appspot.com/x/repro.c?x=178e99f9e00000
> >
> > The bug was bisected to:
> >
> > commit c9e1feb96bd90a4b51d440a015ba2f1c0562de59
> > Author: Dan Schatzberg <schatzberg.dan@gmail.com>
> > Date: Tue Feb 25 04:14:08 2020 +0000
> >
> > loop: charge i/o to mem and blk cg
>
> That commit was dropped on March 3.
>
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