* Re: [syzbot] BUG: sleeping function called from invalid context in __vmalloc_node_range
2022-06-20 10:19 ` [syzbot] BUG: sleeping function called from invalid context in __vmalloc_node_range Sebastian Andrzej Siewior
@ 2022-06-20 11:24 ` Aleksandr Nogikh
0 siblings, 0 replies; 2+ messages in thread
From: Aleksandr Nogikh @ 2022-06-20 11:24 UTC (permalink / raw)
To: Sebastian Andrzej Siewior
Cc: syzbot, Andrew Morton, Andrii Nakryiko, Alexei Starovoitov, bpf,
brauner, Daniel Borkmann, david, ebiederm, John Fastabend,
Martin KaFai Lau, KP Singh, LKML, netdev, Song Liu,
'Aleksandr Nogikh' via syzkaller-bugs, tglx,
Yonghong Song, linux-mm, Christoph Hellwig, Dmitry Vyukov
Hi Sebastian,
Syzbot has noted the new fixing commit -- "mm/page_alloc: protect PCP
lists with a spinlock", but it's not really happy with two commands in
one email.
Let's try it one more time in this separate email:
#syz dup: BUG: sleeping function called from invalid context in relay_open_buf
--
Best Regards,
Aleksandr
On Mon, Jun 20, 2022 at 12:19 PM Sebastian Andrzej Siewior
<bigeasy@linutronix.de> wrote:
>
> #syz fix: mm/page_alloc: protect PCP lists with a spinlock
> #syz dup: BUG: sleeping function called from invalid context in relay_open_buf
>
> The version of the patch above in next-20220614 is buggy leading to the
> report below. The version in next-20220620 is fine. Not sure how to tell
> syz bot this…
>
> On 2022-06-18 15:15:20 [-0700], syzbot wrote:
> > Hello,
> >
> > syzbot found the following issue on:
> >
> > HEAD commit: 35d872b9ea5b Add linux-next specific files for 20220614
> > git tree: linux-next
> > console output: https://syzkaller.appspot.com/x/log.txt?x=155b0d10080000
> > kernel config: https://syzkaller.appspot.com/x/.config?x=d7bf2236c6bb2403
> > dashboard link: https://syzkaller.appspot.com/bug?extid=b577bc624afda52c78de
> > compiler: gcc (Debian 10.2.1-6) 10.2.1 20210110, GNU ld (GNU Binutils for Debian) 2.35.2
> >
> > Unfortunately, I don't have any reproducer for this issue yet.
> >
> > IMPORTANT: if you fix the issue, please add the following tag to the commit:
> > Reported-by: syzbot+b577bc624afda52c78de@syzkaller.appspotmail.com
> >
> > BUG: sleeping function called from invalid context at mm/vmalloc.c:2980
> …
> > Preemption disabled at:
> > [<ffffffff81bc76f5>] rmqueue_pcplist mm/page_alloc.c:3813 [inline]
> > [<ffffffff81bc76f5>] rmqueue mm/page_alloc.c:3858 [inline]
> > [<ffffffff81bc76f5>] get_page_from_freelist+0x455/0x3a20 mm/page_alloc.c:4293
>
> Sebastian
>
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