Re: [syzbot] [block?] possible deadlock in blk_mq_freeze_queue_nomemsave

Ming Lei
2025-04-04T13:51:00Z

On Thu, Apr 03, 2025 at 01:34:24AM -0700, syzbot wrote:
> syzbot has found a reproducer for the following issue on:
>
> HEAD commit: a1b5bd45d4ee Merge tag 'usb-6.15-rc1' of git://git.kernel...
> git tree: upstream
> console output: https://syzkaller.appspot.com/x/log.txt?x=1711cfb0580000
> kernel config: https://syzkaller.appspot.com/x/.config?x=adffebefc9feb9d6
> dashboard link: https://syzkaller.appspot.com/bug?extid=9dd7dbb1a4b915dee638
> compiler: gcc (Debian 12.2.0-14) 12.2.0, GNU ld (GNU Binutils for Debian) 2.40
> syz repro: https://syzkaller.appspot.com/x/repro.syz?x=12ee494c580000
> C reproducer: https://syzkaller.appspot.com/x/repro.c?x=13df5998580000
>
> Downloadable assets:
> disk image (non-bootable): https://storage.googleapis.com/syzbot-assets/7feb34a89c2a/non_bootable_disk-a1b5bd45.raw.xz
> vmlinux: https://storage.googleapis.com/syzbot-assets/588b4d489b63/vmlinux-a1b5bd45.xz
> kernel image: https://storage.googleapis.com/syzbot-assets/51ead797f7ae/bzImage-a1b5bd45.xz
>
> IMPORTANT: if you fix the issue, please add the following tag to the commit:
> Reported-by: syzbot+9dd7dbb1a4b915dee638@syzkaller.appspotmail.com

...

> If you want syzbot to run the reproducer, reply with:
> #syz test: git://repo/address.git branch-or-commit-hash
> If you attach or paste a git patch, syzbot will apply it before testing.

#syz test: https://github.com/ming1/linux.git syzbot-test

Thanks,
Ming