linux-kernel - Re: KMSAN: uninit-value in af_alg_free_areq

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Date:   Fri, 06 Jul 2018 18:27:07 +0200
From:   Stephan Mueller <smueller@...onox.de>
To:     Dmitry Vyukov <dvyukov@...gle.com>
Cc:     syzbot <syzbot+9c251bdd09f83b92ba95@...kaller.appspotmail.com>,
        David Miller <davem@...emloft.net>,
        Herbert Xu <herbert@...dor.apana.org.au>,
        "open list:HARDWARE RANDOM NUMBER GENERATOR CORE" 
        <linux-crypto@...r.kernel.org>,
        LKML <linux-kernel@...r.kernel.org>,
        syzkaller-bugs <syzkaller-bugs@...glegroups.com>
Subject: Re: KMSAN: uninit-value in af_alg_free_areq_sgls

Am Freitag, 6. Juli 2018, 10:19:07 CEST schrieb Dmitry Vyukov:

Hi Dmitry,

> On Fri, Jul 6, 2018 at 10:09 AM, syzbot
> 
> <syzbot+9c251bdd09f83b92ba95@...kaller.appspotmail.com> wrote:
> > Hello,
> > 
> > syzbot tried to test the proposed patch but build/boot failed:
> > 
> > lost connection to test machine
> 
> Looking into this.

syzkaller reported the following which implies that the patch seems to fix the 
issue.


syzbot has tested the proposed patch and the reproducer did not trigger  
crash:

Reported-and-tested-by:  
syzbot+9c251bdd09f83b92ba95@...kaller.appspotmail.com

Tested on:

commit:         a00de5aa4da3 kmsan: delete some dead code
git tree:       https://github.com/google/kmsan.git/master
kernel config:  https://syzkaller.appspot.com/x/.config?x=b11f4cfb262ee607
compiler:       clang version 7.0.0 (trunk 334104)
patch:          https://syzkaller.appspot.com/x/patch.diff?x=13194968400000

Note: testing is done by a robot and is best-effort only.


Ciao
Stephan