syzbot


WARNING: locking bug in ext4_ioctl

Status: fixed on 2025/01/23 17:20
Reported-by: syzbot+78e78ea5632a74486fbb@syzkaller.appspotmail.com
Fix commit: 48c335245371 locking/lockdep: Avoid creating new name string literals in lockdep_set_subclass()
First crash: 725d, last: 172d
Fix bisection: fixed by (bisect log) :
commit 48c3352453718ed3ad671b0fdcc7e0bb5f8dad44
Author: Ahmed Ehab <bottaawesome633@gmail.com>
Date: Sat Aug 24 22:10:30 2024 +0000

  locking/lockdep: Avoid creating new name string literals in lockdep_set_subclass()

  
Bug presence (1)
Date Name Commit Repro Result
2024/12/25 upstream (ToT) 9b2ffa6148b1 C Didn't crash
Similar bugs (2)
Kernel Title Repro Cause bisect Fix bisect Count Last Reported Patched Status
upstream WARNING: locking bug in ext4_ioctl ext4 C done done 923 179d 730d 0/28 upstream: reported C repro on 2023/06/05 05:19
linux-6.1 WARNING: locking bug in ext4_ioctl origin:lts-only C inconclusive 242 174d 721d 0/3 upstream: reported C repro on 2023/06/13 21:15

Sample crash report:
EXT4-fs error (device loop5): ext4_orphan_get:1427: comm syz.5.184: bad orphan inode 8192
EXT4-fs (loop5): mounted filesystem without journal. Opts: ,errors=continue. Quota mode: none.
------------[ cut here ]------------
WARNING: CPU: 1 PID: 5210 at kernel/locking/lockdep.c:896 look_up_lock_class+0xa0/0x120 kernel/locking/lockdep.c:895
Modules linked in:
CPU: 1 PID: 5210 Comm: syz.5.184 Not tainted 5.15.173-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024
RIP: 0010:look_up_lock_class+0xa0/0x120 kernel/locking/lockdep.c:895
Code: 00 48 85 db 74 4c 4c 39 7b 40 74 05 48 8b 1b eb eb 48 8b 83 b0 00 00 00 49 3b 46 18 74 36 48 c7 c0 c0 7f 4f 90 49 39 06 74 2a <0f> 0b eb 26 e8 57 c2 d1 f9 48 c7 c7 80 4b ab 8a 89 de e8 69 cf fe
RSP: 0018:ffffc900030b76b0 EFLAGS: 00010006
RAX: ffffffff904f7fc0 RBX: ffffffff9039bf40 RCX: ffff88802c8cbb80
RDX: dffffc0000000000 RSI: 0000000000000001 RDI: ffff88807416aa58
RBP: ffffc900030b77b0 R08: 0000000000000001 R09: 0000000000000000
R10: 0000000000000000 R11: dffffc0000000001 R12: 0000000000000001
R13: 1ffff92000616ee4 R14: ffff88807416aa58 R15: ffffffff96bb6c81
FS:  00007ff0bb78b6c0(0000) GS:ffff8880b8f00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000020008000 CR3: 000000005b3f0000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 register_lock_class+0x100/0x9a0 kernel/locking/lockdep.c:1245
 __lock_acquire+0xd7/0x1ff0 kernel/locking/lockdep.c:4891
 lock_acquire+0x1db/0x4f0 kernel/locking/lockdep.c:5623
 down_write_nested+0x3b/0x60 kernel/locking/rwsem.c:1667
 swap_inode_boot_loader fs/ext4/ioctl.c:176 [inline]
 __ext4_ioctl fs/ext4/ioctl.c:1056 [inline]
 ext4_ioctl+0x3dec/0x5b80 fs/ext4/ioctl.c:1276
 vfs_ioctl fs/ioctl.c:51 [inline]
 __do_sys_ioctl fs/ioctl.c:874 [inline]
 __se_sys_ioctl+0xf1/0x160 fs/ioctl.c:860
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x3b/0xb0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x66/0xd0
RIP: 0033:0x7ff0bd91ad19
Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 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 a8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007ff0bb78b038 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007ff0bdb0afa0 RCX: 00007ff0bd91ad19
RDX: 0000000000000000 RSI: 0000000000006611 RDI: 0000000000000005
RBP: 00007ff0bd996a20 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007ff0bdb0afa0 R15: 00007ffcb9fc4348
 </TASK>

Crashes (251):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2024/12/12 04:40 linux-5.15.y 0a51d2d4527b 6f1b0fa8 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING: locking bug in ext4_ioctl
2024/12/11 19:19 linux-5.15.y 0a51d2d4527b ff949d25 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING: locking bug in ext4_ioctl
2024/12/11 01:41 linux-5.15.y 0a51d2d4527b cfc402b4 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING: locking bug in ext4_ioctl
2024/11/27 09:01 linux-5.15.y 0a51d2d4527b 52b38cc1 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING: locking bug in ext4_ioctl
2024/11/10 11:30 linux-5.15.y 3c17fc483905 6b856513 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING: locking bug in ext4_ioctl
2024/11/09 04:08 linux-5.15.y 3c17fc483905 6b856513 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING: locking bug in ext4_ioctl
2024/11/04 05:51 linux-5.15.y 72244eab0dad f00eed24 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING: locking bug in ext4_ioctl
2024/11/01 05:37 linux-5.15.y 72244eab0dad 96eb609f .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING: locking bug in ext4_ioctl
2024/10/31 12:25 linux-5.15.y 74cdd62cb470 96eb609f .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING: locking bug in ext4_ioctl
2024/10/27 14:04 linux-5.15.y 74cdd62cb470 65e8686b .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING: locking bug in ext4_ioctl
2024/10/25 00:03 linux-5.15.y 74cdd62cb470 c79b8ca5 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING: locking bug in ext4_ioctl
2024/10/22 21:53 linux-5.15.y 74cdd62cb470 a93682b3 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING: locking bug in ext4_ioctl
2024/10/22 14:48 linux-5.15.y 74cdd62cb470 a93682b3 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING: locking bug in ext4_ioctl
2024/10/21 14:32 linux-5.15.y 584a40a22cb9 f1e4447c .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING: locking bug in ext4_ioctl
2024/10/15 07:10 linux-5.15.y 3a5928702e71 b01b6661 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING: locking bug in ext4_ioctl
2024/10/10 17:25 linux-5.15.y 3a5928702e71 8fbfc0c8 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING: locking bug in ext4_ioctl
2024/10/10 01:07 linux-5.15.y 3a5928702e71 56fb2cb7 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING: locking bug in ext4_ioctl
2024/10/09 22:33 linux-5.15.y 3a5928702e71 56fb2cb7 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING: locking bug in ext4_ioctl
2024/10/03 13:26 linux-5.15.y 3a5928702e71 a4c7fd36 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING: locking bug in ext4_ioctl
2024/09/30 18:09 linux-5.15.y 3a5928702e71 bbd4e0a4 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING: locking bug in ext4_ioctl
2024/09/28 10:32 linux-5.15.y 3a5928702e71 ba29ff75 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING: locking bug in ext4_ioctl
2024/09/25 21:49 linux-5.15.y 3a5928702e71 0d19f247 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING: locking bug in ext4_ioctl
2024/09/23 19:08 linux-5.15.y 3a5928702e71 89298aad .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING: locking bug in ext4_ioctl
2024/09/20 08:46 linux-5.15.y 3a5928702e71 6f888b75 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING: locking bug in ext4_ioctl
2024/09/15 06:19 linux-5.15.y 3a5928702e71 08d8a733 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING: locking bug in ext4_ioctl
2024/09/11 18:14 linux-5.15.y 14e468424d3e 8ab55d0e .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING: locking bug in ext4_ioctl
2023/07/28 20:40 linux-5.15.y 09996673e313 92476829 .config console log report syz C [disk image] [vmlinux] [kernel image] [mounted in repro] ci2-linux-5-15-kasan WARNING: locking bug in ext4_ioctl
2023/06/25 19:46 linux-5.15.y f67653019430 79782afc .config console log report syz C [disk image] [vmlinux] [kernel image] [mounted in repro] ci2-linux-5-15-kasan WARNING: locking bug in ext4_ioctl
2024/12/13 22:10 linux-5.15.y 0a51d2d4527b 7cbfbb3a .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-arm64 WARNING: locking bug in ext4_ioctl
2024/12/08 18:07 linux-5.15.y 0a51d2d4527b 9ac0fdc6 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-arm64 WARNING: locking bug in ext4_ioctl
2024/11/26 18:28 linux-5.15.y 0a51d2d4527b e9a9a9f2 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-arm64 WARNING: locking bug in ext4_ioctl
2024/11/12 22:08 linux-5.15.y 3c17fc483905 62026c85 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-arm64 WARNING: locking bug in ext4_ioctl
2024/11/08 14:28 linux-5.15.y 72244eab0dad 179b040e .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-arm64 WARNING: locking bug in ext4_ioctl
2024/10/29 02:29 linux-5.15.y 74cdd62cb470 9efb3cc7 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-arm64 WARNING: locking bug in ext4_ioctl
2024/10/25 07:40 linux-5.15.y 74cdd62cb470 c79b8ca5 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-arm64 WARNING: locking bug in ext4_ioctl
2024/10/22 05:28 linux-5.15.y 584a40a22cb9 a93682b3 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-arm64 WARNING: locking bug in ext4_ioctl
2024/10/15 22:32 linux-5.15.y 3a5928702e71 bde2d81c .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-arm64 WARNING: locking bug in ext4_ioctl
2024/10/15 10:13 linux-5.15.y 3a5928702e71 7eb57b4a .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-arm64 WARNING: locking bug in ext4_ioctl
2024/10/10 18:29 linux-5.15.y 3a5928702e71 8fbfc0c8 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-arm64 WARNING: locking bug in ext4_ioctl
2024/10/06 02:12 linux-5.15.y 3a5928702e71 d7906eff .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-arm64 WARNING: locking bug in ext4_ioctl
2024/10/04 11:45 linux-5.15.y 3a5928702e71 d7906eff .config console log report syz / log C [disk image] [vmlinux] [kernel image] [mounted in repro] ci2-linux-5-15-kasan-arm64 WARNING: locking bug in ext4_ioctl
2024/09/30 09:16 linux-5.15.y 3a5928702e71 ba29ff75 .config console log report syz / log C [disk image] [vmlinux] [kernel image] [mounted in repro] ci2-linux-5-15-kasan-arm64 WARNING: locking bug in ext4_ioctl
2024/09/26 19:02 linux-5.15.y 3a5928702e71 9314348a .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-arm64 WARNING: locking bug in ext4_ioctl
2024/09/19 12:39 linux-5.15.y 3a5928702e71 c673ca06 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-arm64 WARNING: locking bug in ext4_ioctl
2024/09/12 18:58 linux-5.15.y 3a5928702e71 60e1a995 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-arm64 WARNING: locking bug in ext4_ioctl
2024/09/12 03:20 linux-5.15.y 14e468424d3e d94c83d8 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-arm64 WARNING: locking bug in ext4_ioctl
2024/09/11 12:23 linux-5.15.y 14e468424d3e 8ab55d0e .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-arm64 WARNING: locking bug in ext4_ioctl
2024/07/22 08:53 linux-5.15.y 7c6d66f0266f b88348e9 .config console log report syz / log C [disk image] [vmlinux] [kernel image] [mounted in repro] ci2-linux-5-15-kasan-arm64 WARNING: locking bug in ext4_ioctl
2024/06/30 04:18 linux-5.15.y 4878aadf2d15 757f06b1 .config console log report syz / log C [disk image] [vmlinux] [kernel image] [mounted in repro] ci2-linux-5-15-kasan-arm64 WARNING: locking bug in ext4_ioctl
2024/04/24 00:20 linux-5.15.y c52b9710c83d 21339d7b .config console log report syz C [disk image] [vmlinux] [kernel image] [mounted in repro] ci2-linux-5-15-kasan-arm64 WARNING: locking bug in ext4_ioctl
2024/04/15 09:00 linux-5.15.y fa3df276cd36 c8349e48 .config console log report syz C [disk image] [vmlinux] [kernel image] [mounted in repro] ci2-linux-5-15-kasan-arm64 WARNING: locking bug in ext4_ioctl
2024/04/05 00:10 linux-5.15.y 9465fef4ae35 0ee3535e .config console log report syz C [disk image] [vmlinux] [kernel image] [mounted in repro] ci2-linux-5-15-kasan-arm64 WARNING: locking bug in ext4_ioctl
2024/04/03 23:41 linux-5.15.y 9465fef4ae35 51c4dcff .config console log report syz C [mounted in repro] ci2-linux-5-15-kasan-arm64 WARNING: locking bug in ext4_ioctl
2024/01/01 10:05 linux-5.15.y d93fa2c78854 fb427a07 .config console log report syz C [disk image] [vmlinux] [kernel image] [mounted in repro] ci2-linux-5-15-kasan-arm64 WARNING: locking bug in ext4_ioctl
2023/12/19 21:52 linux-5.15.y d0fc081c6241 3ad490ea .config console log report syz C [disk image] [vmlinux] [kernel image] [mounted in repro] ci2-linux-5-15-kasan-arm64 WARNING: locking bug in ext4_ioctl
2023/06/17 16:51 linux-5.15.y 471e639e59d1 f3921d4d .config console log report syz C [disk image] [vmlinux] [kernel image] [mounted in repro] ci2-linux-5-15-kasan-arm64 WARNING: locking bug in ext4_ioctl
2023/06/09 23:48 linux-5.15.y 7349e40704a0 9018a337 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING: locking bug in ext4_ioctl
* Struck through repros no longer work on HEAD.