syzbot has bisected this issue to: commit 16d0556568148bdcaa45d077cac9f8f7077cf70a Author: Jan Kara <jack@xxxxxxx> Date: Wed Dec 7 17:17:34 2022 +0000 udf: Discard preallocation before extending file with a hole bisection log: https://syzkaller.appspot.com/x/bisect.txt?x=17327857280000 start commit: 99ec1ed7c2ed Merge tag '6.4-rc6-smb3-server-fixes' of git:.. git tree: upstream final oops: https://syzkaller.appspot.com/x/report.txt?x=14b27857280000 console output: https://syzkaller.appspot.com/x/log.txt?x=10b27857280000 kernel config: https://syzkaller.appspot.com/x/.config?x=e74b395fe4978721 dashboard link: https://syzkaller.appspot.com/bug?extid=db6df8c0f578bc11e50e syz repro: https://syzkaller.appspot.com/x/repro.syz?x=1662e03f280000 C reproducer: https://syzkaller.appspot.com/x/repro.c?x=141c5260a80000 Reported-by: syzbot+db6df8c0f578bc11e50e@xxxxxxxxxxxxxxxxxxxxxxxxx Fixes: 16d055656814 ("udf: Discard preallocation before extending file with a hole") For information about bisection process see: https://goo.gl/tpsmEJ#bisection