Re: [syzbot] [nvme?] WARNING in nvme_loop_reset_ctrl_work

[Maurizio Lombardi]

On Sun Sep 13, 2026 at 5:34 PM CEST, syzbot wrote:
> syzbot has found a reproducer for the following issue on:
>
> HEAD commit:    2f0c1cf72f46 Merge tag 's390-7.3-3' of git://git.kernel.or..
> git tree:       git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
> console output: https://syzkaller.appspot.com/x/log.txt?x=159b19f9580000
> kernel config:  https://syzkaller.appspot.com/x/.config?x=8c5c3949d762a91f
> dashboard link: https://syzkaller.appspot.com/bug?extid=4a1d521d19d6321f5aad
> compiler:       gcc (Debian 14.2.0-19) 14.2.0, GNU ld (GNU Binutils for Debian) 2.44
> C reproducer:   https://syzkaller.appspot.com/x/repro.c?x=1074f615580000


It seems that a reset operation is enqueued before the controller
initialization is completed.

when the nvme_loop_reset_ctrl_work() finally runs, it will find the
controller in LIVE state, thus hitting the WARN_ON().

Maurizio