syzbot suspects this issue was fixed by commit: commit 6f861765464f43a71462d52026fbddfc858239a5 Author: Jan Kara <jack@xxxxxxx> Date: Wed Nov 1 17:43:10 2023 +0000 fs: Block writes to mounted block devices bisection log: https://syzkaller.appspot.com/x/bisect.txt?x=14cf63d0180000 start commit: b78b18fb8ee1 Merge tag 'erofs-for-6.6-rc5-fixes' of git://.. git tree: upstream kernel config: https://syzkaller.appspot.com/x/.config?x=7a5682d32a74b423 dashboard link: https://syzkaller.appspot.com/bug?extid=cf96fe0f87933d5cd68a syz repro: https://syzkaller.appspot.com/x/repro.syz?x=120a1c45680000 C reproducer: https://syzkaller.appspot.com/x/repro.c?x=1230440e680000 If the result looks correct, please mark the issue as fixed by replying with: #syz fix: fs: Block writes to mounted block devices For information about bisection process see: https://goo.gl/tpsmEJ#bisection