linux-kernel - Re: [syzbot] KMSAN: uninit-value in ax88772a_hw

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Message-ID: <45e8c415-8aa1-7a2a-c435-3e014f3856eb@gmail.com>
Date:   Sat, 25 Dec 2021 14:15:57 +0300
From:   Pavel Skripkin <paskripkin@...il.com>
To:     syzbot <syzbot+8d179821571093c5f928@...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 ax88772a_hw_reset

On 11/22/21 18:12, syzbot wrote:
> Hello,
> 
> syzbot found the following issue on:
> 
> HEAD commit:    412af9cd936d ioremap.c: move an #include around
> git tree:       https://github.com/google/kmsan.git master
> console output: https://syzkaller.appspot.com/x/log.txt?x=136fb126b00000
> kernel config:  https://syzkaller.appspot.com/x/.config?x=2d142cdf4204061
> dashboard link: https://syzkaller.appspot.com/bug?extid=8d179821571093c5f928
> compiler:       clang version 14.0.0 (git@...hub.com:llvm/llvm-project.git 0996585c8e3b3d409494eb5f1cad714b9e1f7fb5), GNU ld (GNU Binutils for Debian) 2.35.2
> 
> Unfortunately, I don't have any reproducer for this issue yet.
> 
> IMPORTANT: if you fix the issue, please add the following tag to the commit:
> Reported-by: syzbot+8d179821571093c5f928@...kaller.appspotmail.com
> 
> asix 4-1:0.0 (unnamed net_device) (uninitialized): Failed to enable software MII access
> asix 4-1:0.0 (unnamed net_device) (uninitialized): Failed to read reg index 0x0000: -71
> asix 4-1:0.0 (unnamed net_device) (uninitialized): Failed to read reg index 0x0016: -71
> asix 4-1:0.0 (unnamed net_device) (uninitialized): Failed to write reg index 0x0000: -71
> asix 4-1:0.0 (unnamed net_device) (uninitialized): Failed to enable hardware MII access


#syz fix: asix: fix uninit-value in asix_mdio_read()


With regards,
Pavel Skripkin