netdev - Re: [syzbot] [net?] [virt?] upstream test error: KMSAN: uninit-value in receive

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Message-ID: <4ffb1d55-acfd-4647-a4d7-f227a6ad21ea@I-love.SAKURA.ne.jp>
Date: Mon, 17 Jun 2024 16:15:54 +0900
From: Tetsuo Handa <penguin-kernel@...ove.SAKURA.ne.jp>
To: Xuan Zhuo <xuanzhuo@...ux.alibaba.com>, Jason Wang <jasowang@...hat.com>,
        Jakub Kicinski <kuba@...nel.org>
Cc: syzbot <syzbot+799fbb6d9e02a7a1d62b@...kaller.appspotmail.com>,
        davem@...emloft.net, edumazet@...gle.com, eperezma@...hat.com,
        linux-kernel@...r.kernel.org, mst@...hat.com, netdev@...r.kernel.org,
        pabeni@...hat.com, syzkaller-bugs@...glegroups.com,
        virtualization@...ts.linux.dev
Subject: Re: [syzbot] [net?] [virt?] upstream test error: KMSAN: uninit-value
 in receive_buf

Bisection reached commit f9dac92ba908 ("virtio_ring: enable premapped mode
whatever use_dma_api").

On 2024/05/26 1:12, syzbot wrote:
> Hello,
> 
> syzbot found the following issue on:
> 
> HEAD commit:    56fb6f92854f Merge tag 'drm-next-2024-05-25' of https://gi..
> git tree:       upstream
> console output: https://syzkaller.appspot.com/x/log.txt?x=157a5462980000
> kernel config:  https://syzkaller.appspot.com/x/.config?x=1b6c22bca89a3565
> dashboard link: https://syzkaller.appspot.com/bug?extid=799fbb6d9e02a7a1d62b
> compiler:       Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40
> 
> Downloadable assets:
> disk image: https://storage.googleapis.com/syzbot-assets/39a256e13faa/disk-56fb6f92.raw.xz
> vmlinux: https://storage.googleapis.com/syzbot-assets/d4ecc47a8198/vmlinux-56fb6f92.xz
> kernel image: https://storage.googleapis.com/syzbot-assets/0d37bfdfb0ca/bzImage-56fb6f92.xz
> 
> IMPORTANT: if you fix the issue, please add the following tag to the commit:
> Reported-by: syzbot+799fbb6d9e02a7a1d62b@...kaller.appspotmail.com