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

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Date:   Tue, 22 Feb 2022 17:04:51 +0530
From:   Anirudh Rayabharam <mail@...rudhrb.com>
To:     Dan Carpenter <dan.carpenter@...cle.com>
Cc:     Stefano Garzarella <sgarzare@...hat.com>,
        syzbot <syzbot+0abd373e2e50d704db87@...kaller.appspotmail.com>,
        Jason Wang <jasowang@...hat.com>, kvm <kvm@...r.kernel.org>,
        kernel list <linux-kernel@...r.kernel.org>,
        Michael Tsirkin <mst@...hat.com>,
        netdev <netdev@...r.kernel.org>, syzkaller-bugs@...glegroups.com,
        Linux Virtualization <virtualization@...ts.linux-foundation.org>
Subject: Re: [syzbot] INFO: task hung in vhost_work_dev_flush

On Tue, Feb 22, 2022 at 01:05:56PM +0300, Dan Carpenter wrote:
> On Mon, Feb 21, 2022 at 09:23:04PM +0530, Anirudh Rayabharam wrote:
> > On Mon, Feb 21, 2022 at 03:12:33PM +0100, Stefano Garzarella wrote:
> > > #syz test: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/
> > > f71077a4d84b
> > > 
> > > Patch sent upstream:
> > > https://lore.kernel.org/virtualization/20220221114916.107045-1-sgarzare@redhat.com/T/#u
> > 
> > I don't see how your patch fixes this issue. It looks unrelated. It is
> > surprising that syzbot is happy with it.
> > 
> > I have sent a patch for this issue here:
> > https://lore.kernel.org/lkml/20220221072852.31820-1-mail@anirudhrb.com/
> 
> I wasted so much time trying to figure out what this patch fixes.  :P

Sorry! The new patch is here:
https://lore.kernel.org/lkml/20220221195303.13560-1-mail@anirudhrb.com/T/#u

Thanks!

	- Anirudh.

> 
> (It doesn't fix anything).
> 
> regards,
> dan carpenter
>