linux-kernel - Re: [syzbot] INFO: task hung in add_early

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Message-ID: <CACGkMEvCmtmfBSDeq1psgW4+MTymfs_T-EFQx=2UdXfy1vWDiw@mail.gmail.com>
Date:   Tue, 7 Jun 2022 17:05:41 +0800
From:   Jason Wang <jasowang@...hat.com>
To:     syzbot <syzbot+5b59d6d459306a556f54@...kaller.appspotmail.com>
Cc:     Herbert Xu <herbert@...dor.apana.org.au>,
        linux-crypto@...r.kernel.org,
        linux-kernel <linux-kernel@...r.kernel.org>,
        linux@...inikbrodowski.net, mpm@...enic.com, mst <mst@...hat.com>,
        syzkaller-bugs@...glegroups.com,
        Xuan Zhuo <xuanzhuo@...ux.alibaba.com>, yuehaibing@...wei.com
Subject: Re: [syzbot] INFO: task hung in add_early_randomness (2)

On Tue, Jun 7, 2022 at 3:30 PM syzbot
<syzbot+5b59d6d459306a556f54@...kaller.appspotmail.com> wrote:
>
> syzbot has bisected this issue to:
>
> commit 8b4ec69d7e098a7ddf832e1e7840de53ed474c77
> Author: Jason Wang <jasowang@...hat.com>
> 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@...kaller.appspotmail.com
> 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

Download attachment "0001-virtio_ring-use-IRQ_HANDLED.patch" of type "application/octet-stream" (863 bytes)