[syzbot] [erofs?] [fat?] WARNING in erofs_kill_sb

[Christoph Hellwig]

On Mon, Jul 31, 2023 at 12:57:58AM -0700, syzbot wrote:
> Hello,
> 
> syzbot found the following issue on:
> 
> HEAD commit:    d7b3af5a77e8 Add linux-next specific files for 20230728

Hmm, the current linux-next tree does not seem to have that commit ID
any more, and the line numbers don't match up.  I think it is the
WARN_ON for the magic, which could probably be just removed.  I'll
try the reproducers when I find a bit more time.