On Mon, 17 Jun 2024 16:15:54 +0900, Tetsuo Handa [off-list ref] wrote:

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

On 2024/05/26 1:12, syzbot wrote:

quoted

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@syzkaller.appspotmail.com

Maybe this patch can fix this issue:

	 http://lore.kernel.org/all/20240606111345.93600-1-xuanzhuo@linux.alibaba.com (local)

Thanks.