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charset="UTF-8" syzbot has bisected this issue to: commit 03ef80b469d5d83530ce1ce15be78a40e5300f9b Author: Kent Overstreet Date: Sat Sep 23 22:41:51 2023 +0000 bcachefs: Ignore unknown mount options bisection log: https://syzkaller.appspot.com/x/bisect.txt?x=17afcbc0980000 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=146fcbc0980000 console output: https://syzkaller.appspot.com/x/log.txt?x=106fcbc0980000 kernel config: https://syzkaller.appspot.com/x/.config?x=d2f00edef461175 dashboard link: https://syzkaller.appspot.com/bug?extid=594427aebfefeebe91c6 syz repro: https://syzkaller.appspot.com/x/repro.syz?x=12d1b2a0980000 C reproducer: https://syzkaller.appspot.com/x/repro.c?x=135c2ca8980000 Reported-by: syzbot+594427aebfefeebe91c6@syzkaller.appspotmail.com Fixes: 03ef80b469d5 ("bcachefs: Ignore unknown mount options") For information about bisection process see: https://goo.gl/tpsmEJ#bisection