[syzbot] [erofs?] WARNING in erofs_kill_sb

[Gao Xiang]

On 2023/8/29 12:14, syzbot wrote:
> Hello,
> 
> syzbot has tested the proposed patch and the reproducer did not trigger any issue:
> 
> Reported-and-tested-by: syzbot+69c477e882e44ce41ad9 at syzkaller.appspotmail.com
> 
> Tested on:
> 
> commit:         1c59d383 Merge tag 'linux-kselftest-nolibc-6.6-rc1' of..
> git tree:       https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
> console output: https://syzkaller.appspot.com/x/log.txt?x=14f819dfa80000
> kernel config:  https://syzkaller.appspot.com/x/.config?x=9678e210dd5e4a5f
> dashboard link: https://syzkaller.appspot.com/bug?extid=69c477e882e44ce41ad9
> compiler:       gcc (Debian 12.2.0-14) 12.2.0, GNU ld (GNU Binutils for Debian) 2.40
> 
> Note: no patches were applied.
> Note: testing is done by a robot and is best-effort only.

#syz invalid

since commit 4da3c7183e18 ("erofs: drop unnecessary WARN_ON() in
erofs_kill_sb()") merged ahead of

fs: open block device after superblock creation

so this issue only existed in some previous -next versions.
This report doesn't impact anything upstream.

Thanks,
Gao Xiang