syzbot has bisected this issue to: commit 03ef80b469d5d83530ce1ce15be78a40e5300f9b Author: Kent Overstreet <kent.overstreet@xxxxxxxxx> Date: Sat Sep 23 22:41:51 2023 +0000 bcachefs: Ignore unknown mount options bisection log: https://syzkaller.appspot.com/x/bisect.txt?x=15e58a70980000 start commit: 7367539ad4b0 Merge tag 'cxl-fixes-6.9-rc7' of git://git.ke.. git tree: upstream final oops: https://syzkaller.appspot.com/x/report.txt?x=17e58a70980000 console output: https://syzkaller.appspot.com/x/log.txt?x=13e58a70980000 kernel config: https://syzkaller.appspot.com/x/.config?x=d2f00edef461175 dashboard link: https://syzkaller.appspot.com/bug?extid=c48865e11e7e893ec4ab syz repro: https://syzkaller.appspot.com/x/repro.syz?x=1043897f180000 C reproducer: https://syzkaller.appspot.com/x/repro.c?x=145c078b180000 Reported-by: syzbot+c48865e11e7e893ec4ab@xxxxxxxxxxxxxxxxxxxxxxxxx Fixes: 03ef80b469d5 ("bcachefs: Ignore unknown mount options") For information about bisection process see: https://goo.gl/tpsmEJ#bisection