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

[Xuan Zhuo]

On Mon, 17 Jun 2024 16:15:54 +0900, Tetsuo Handa <penguin-kernel@xxxxxxxxxxxxxxxxxxx> wrote:
> 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@xxxxxxxxxxxxxxxxxxxxxxxxx
>

Maybe this patch can fix this issue:

	 http://lore.kernel.org/all/20240606111345.93600-1-xuanzhuo@xxxxxxxxxxxxxxxxx

Thanks.