linux-kernel - Re: upstream kernel crashes

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Message-ID: <20220815120007-mutt-send-email-mst@kernel.org>
Date:   Mon, 15 Aug 2022 12:01:56 -0400
From:   "Michael S. Tsirkin" <mst@...hat.com>
To:     Guenter Roeck <linux@...ck-us.net>
Cc:     linux-kernel@...r.kernel.org,
        Linus Torvalds <torvalds@...ux-foundation.org>,
        Greg KH <gregkh@...uxfoundation.org>
Subject: Re: upstream kernel crashes

On Mon, Aug 15, 2022 at 08:49:20AM -0700, Guenter Roeck wrote:
> On Mon, Aug 15, 2022 at 05:43:19AM -0400, Michael S. Tsirkin wrote:
> > On Sun, Aug 14, 2022 at 02:26:10PM -0700, Guenter Roeck wrote:
> > > Hi all,
> > > 
> > > syscaller reports lots of crashes with the mainline kernel. The latest
> > > I have seen, based on the current ToT, is attached. Backtraces are not
> > > always the same, but this one is typical.
> > > 
> > > I have not tried to analyze this further.
> > > 
> > > Guenter
> > 
> > Thanks a lot for the report!
> > 
> > Could you please try the latest vhost tree:
> > https://git.kernel.org/pub/scm/linux/kernel/git/mst/vhost.git linux-next
> > 
> > which has been reported by Andres Freund to fix a similar issue?
> > 
> 
> I have now literally seen dozens of reports with syzcaller crashing
> in various code locations, but we are still trying to actually reproduce
> the problem. We'll respond on the revert patch once we can reproduce the
> issue and thus the fix.
> 
> Thanks,
> Guenter

OK I think I will give it a day in next and then send it to Linus.
Would be nice to know before that - vacation next week so I'd like to be
reasonably sure things are nice and quiet and everyone can proceed with
testing.

-- 
MST