Re: [syzbot] INFO: task hung in add_early_randomness (2)

[Jason Wang]

On Tue, Jun 7, 2022 at 3:30 PM syzbot
<syzbot+5b59d6d459306a556f54@xxxxxxxxxxxxxxxxxxxxxxxxx> wrote:
>
> syzbot has bisected this issue to:
>
> commit 8b4ec69d7e098a7ddf832e1e7840de53ed474c77
> Author: Jason Wang <jasowang@xxxxxxxxxx>
> Date:   Fri May 27 06:01:19 2022 +0000
>
>     virtio: harden vring IRQ
>
> bisection log:  https://syzkaller.appspot.com/x/bisect.txt?x=1175c3c7f00000
> start commit:   f2906aa86338 Linux 5.19-rc1
> git tree:       upstream
> final oops:     https://syzkaller.appspot.com/x/report.txt?x=1375c3c7f00000
> console output: https://syzkaller.appspot.com/x/log.txt?x=1575c3c7f00000
> kernel config:  https://syzkaller.appspot.com/x/.config?x=cbd131cc02ee620e
> dashboard link: https://syzkaller.appspot.com/bug?extid=5b59d6d459306a556f54
> syz repro:      https://syzkaller.appspot.com/x/repro.syz?x=104f4d4ff00000
> C reproducer:   https://syzkaller.appspot.com/x/repro.c?x=14d6782df00000
>
> Reported-by: syzbot+5b59d6d459306a556f54@xxxxxxxxxxxxxxxxxxxxxxxxx
> Fixes: 8b4ec69d7e09 ("virtio: harden vring IRQ")
>
> For information about bisection process see: https://goo.gl/tpsmEJ#bisection
>

I wonder if it's related to shared IRQ.

Want to know if the attached patch works.

Thanks

Attachment: 0001-virtio_ring-use-IRQ_HANDLED.patch
Description: Binary data