Hello, syzbot found the following issue on: HEAD commit: 62d8779610bb Merge tag 'ext4_for_linus_stable' of git://gi.. git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=141c82cf280000 kernel config: https://syzkaller.appspot.com/x/.config?x=7ff8f87c7ab0e04e dashboard link: https://syzkaller.appspot.com/bug?extid=a2437d95d06a2981a064 compiler: Debian clang version 15.0.7, GNU ld (GNU Binutils for Debian) 2.35.2 Unfortunately, I don't have any reproducer for this issue yet. Downloadable assets: disk image: https://storage.googleapis.com/syzbot-assets/ccba1c442e42/disk-62d87796.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/440c5fc50bd7/vmlinux-62d87796.xz kernel image: https://storage.googleapis.com/syzbot-assets/868795f3b102/bzImage-62d87796.xz IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+a2437d95d06a2981a064@xxxxxxxxxxxxxxxxxxxxxxxxx UDF-fs: INFO Mounting volume 'LinuxUDF', timestamp 2022/11/22 14:59 (1000) ------------[ cut here ]------------ WARNING: CPU: 1 PID: 950 at fs/udf/udfdecl.h:123 udf_add_fid_counter fs/udf/namei.c:350 [inline] WARNING: CPU: 1 PID: 950 at fs/udf/udfdecl.h:123 udf_rmdir+0x7f5/0x8f0 fs/udf/namei.c:529 Modules linked in: CPU: 1 PID: 950 Comm: syz-executor.3 Not tainted 6.4.0-rc6-syzkaller-00049-g62d8779610bb #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/27/2023 RIP: 0010:udf_updated_lvid fs/udf/udfdecl.h:121 [inline] RIP: 0010:udf_add_fid_counter fs/udf/namei.c:350 [inline] RIP: 0010:udf_rmdir+0x7f5/0x8f0 fs/udf/namei.c:529 Code: fe 48 8d 9c 24 70 01 00 00 e9 4c fa ff ff e8 72 66 8b fe 4c 89 ef e8 0a bf 01 00 bb d9 ff ff ff e9 4e ff ff ff e8 5b 66 8b fe <0f> 0b e9 f2 fc ff ff 89 f9 80 e1 07 38 c1 0f 8c 30 f9 ff ff be 06 RSP: 0018:ffffc9000efdfb00 EFLAGS: 00010287 RAX: ffffffff83001945 RBX: 000000000d1c1470 RCX: 0000000000040000 RDX: ffffc90004243000 RSI: 0000000000002abd RDI: 0000000000002abe RBP: ffffc9000efdfd98 R08: ffffffff83001631 R09: fffffbfff1cabb6e R10: 0000000000000000 R11: dffffc0000000001 R12: 1ffff11003f038cf R13: ffff888038af401c R14: ffff88801f81c678 R15: dffffc0000000000 FS: 00007fd39ef2f700(0000) GS:ffff8880b9900000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000020020000 CR3: 0000000033b6f000 CR4: 00000000003506e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: <TASK> vfs_rmdir+0x35f/0x4c0 fs/namei.c:4198 do_rmdir+0x3a7/0x6a0 fs/namei.c:4257 __do_sys_rmdir fs/namei.c:4276 [inline] __se_sys_rmdir fs/namei.c:4274 [inline] __x64_sys_rmdir+0x49/0x50 fs/namei.c:4274 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x41/0xc0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd RIP: 0033:0x7fd39e28c389 Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 f1 19 00 00 90 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 b8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007fd39ef2f168 EFLAGS: 00000246 ORIG_RAX: 0000000000000054 RAX: ffffffffffffffda RBX: 00007fd39e3abf80 RCX: 00007fd39e28c389 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000020000640 RBP: 00007fd39e2d7493 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007ffd527f4b7f R14: 00007fd39ef2f300 R15: 0000000000022000 </TASK> --- This report is generated by a bot. It may contain errors. See https://goo.gl/tpsmEJ for more information about syzbot. syzbot engineers can be reached at syzkaller@xxxxxxxxxxxxxxxx. syzbot will keep track of this issue. See: https://goo.gl/tpsmEJ#status for how to communicate with syzbot. If the bug is already fixed, let syzbot know by replying with: #syz fix: exact-commit-title If you want to change bug's subsystems, reply with: #syz set subsystems: new-subsystem (See the list of subsystem names on the web dashboard) If the bug is a duplicate of another bug, reply with: #syz dup: exact-subject-of-another-report If you want to undo deduplication, reply with: #syz undup
