linux-kernel - Re: [syzbot] KMSAN: uninit-value in asix_mdio

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Message-ID: <06e26e67-8ba0-8de7-df66-67c0b57a7dbc@gmail.com>
Date:   Sun, 13 Mar 2022 20:42:37 +0300
From:   Pavel Skripkin <paskripkin@...il.com>
To:     syzbot <syzbot+9ed16c369e0f40e366b2@...kaller.appspotmail.com>,
        andrew@...n.ch, davem@...emloft.net, glider@...gle.com,
        kuba@...nel.org, linux-kernel@...r.kernel.org,
        linux-usb@...r.kernel.org, linux@...pel-privat.de,
        netdev@...r.kernel.org, syzkaller-bugs@...glegroups.com
Subject: Re: [syzbot] KMSAN: uninit-value in asix_mdio_read (3)

On 3/13/22 10:35, syzbot wrote:
> Hello,
> 
> syzbot found the following issue on:
> 
> HEAD commit:    724946410067 x86: kmsan: enable KMSAN builds for x86
> git tree:       https://github.com/google/kmsan.git master
> console output: https://syzkaller.appspot.com/x/log.txt?x=158dd1f6700000
> kernel config:  https://syzkaller.appspot.com/x/.config?x=28718f555f258365
> dashboard link: https://syzkaller.appspot.com/bug?extid=9ed16c369e0f40e366b2
> compiler:       clang version 14.0.0 (/usr/local/google/src/llvm-git-monorepo 2b554920f11c8b763cd9ed9003f4e19b919b8e1f), GNU ld (GNU Binutils for Debian) 2.35.2
> syz repro:      https://syzkaller.appspot.com/x/repro.syz?x=11b31281700000
> C reproducer:   https://syzkaller.appspot.com/x/repro.c?x=15e8c4ee700000
> 

Hm, we have closed the same bug with my patch from -next tree. Let's 
check if it really fixes the problem...

#syz test: https://github.com/google/kmsan.git master




With regards,
Pavel Skripkin
View attachment "0001-net-asix-add-proper-error-handling-of-usb-read-error.patch" of type "text/x-patch" (5107 bytes)