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From: Takashi Iwai <tiwai@suse.de>
To: Alexander Potapenko <glider@google.com>
Cc: syzbot+1cb36954e127c98dd037@syzkaller.appspotmail.com,
	alsa-devel@alsa-project.org, syzkaller-bugs@googlegroups.com,
	perex@perex.cz, LKML <linux-kernel@vger.kernel.org>
Subject: Re: KMSAN: uninit-value in linear_transfer (2)
Date: Fri, 09 Nov 2018 14:00:48 +0100	[thread overview]
Message-ID: <s5hwopmz9q7.wl-tiwai@suse.de> (raw)
In-Reply-To: <CAG_fn=U8joA4f1e0+qjxJ7HhGf9z2ugdw_SmwL2ay-MCiT7EEA@mail.gmail.com>

On Fri, 09 Nov 2018 13:17:25 +0100,
Alexander Potapenko wrote:
> 
> > It's still strange that the conversion function gets called for the
> > uninitialized source.  But we should clear the vmalloc page in anyway
> > for avoiding such a problem.  And even better would be to use
> > kvzalloc() for a better performance.
> >
> > Could you check whether the patch works?
> The patch works and fixes the problem for me.

OK, I'm going to queue it, then.

> > I forgot the way to trigger the test for kmsan stuff.  IIRC, just
> > pushing to my tree and triggering syz test won't work for KMSAN,
> > right?
> Right, you need to test against KMSAN tree, see
> https://github.com/google/syzkaller/blob/master/docs/syzbot.md#kmsan-bugs

Thanks, that's the note I forgot :)


Takashi

      reply	other threads:[~2018-11-09 13:00 UTC|newest]

Thread overview: 5+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2018-11-08 20:38 syzbot
2018-11-09  9:31 ` Alexander Potapenko
2018-11-09 11:18   ` Takashi Iwai
2018-11-09 12:17     ` Alexander Potapenko
2018-11-09 13:00       ` Takashi Iwai [this message]

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