WARNING: ODEBUG bug in generic_shutdown_super (2)

Status: upstream: reported on 2024/05/06 02:03
Reported-by: syzbot+9f4e5c6733670beb6dbb@syzkaller.appspotmail.com
First crash: 899d, last: 5d04h
▶ ▼ Similar bugs (3)
Kernel Title Rank 🛈 Repro Cause bisect Fix bisect Count Last Reported Patched Status
upstream WARNING: ODEBUG bug in generic_shutdown_super (2) prio:high fs -1 5 17d 33d 0/29 moderation: reported on 2026/09/18 13:29
upstream WARNING: ODEBUG bug in generic_shutdown_super prio:high fs -1 2 225d 225d 0/29 auto-obsoleted due to no activity on 2026/06/08 12:11
linux-6.1 WARNING: ODEBUG bug in generic_shutdown_super -1 2 1030d 1108d 0/3 auto-obsoleted due to no activity on 2024/04/05 01:21

Sample crash report:
------------[ cut here ]------------
ODEBUG: free active (active state 0) object type: timer_list hint: print_daily_error_info+0x0/0x480
WARNING: CPU: 0 PID: 8996 at lib/debugobjects.c:518 debug_print_object lib/debugobjects.c:515 [inline]
WARNING: CPU: 0 PID: 8996 at lib/debugobjects.c:518 __debug_check_no_obj_freed lib/debugobjects.c:1045 [inline]
WARNING: CPU: 0 PID: 8996 at lib/debugobjects.c:518 debug_check_no_obj_freed+0x395/0x520 lib/debugobjects.c:1075
Modules linked in:
CPU: 0 PID: 8996 Comm: syz-executor Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/07/2026
RIP: 0010:debug_print_object lib/debugobjects.c:515 [inline]
RIP: 0010:__debug_check_no_obj_freed lib/debugobjects.c:1045 [inline]
RIP: 0010:debug_check_no_obj_freed+0x395/0x520 lib/debugobjects.c:1075
Code: e8 f0 60 b8 fd 4c 8b 45 00 48 c7 c7 20 7b df 8a 48 c7 c6 80 77 df 8a 48 c7 c2 80 7c df 8a 8b 4c 24 1c 4d 89 e9 e8 1b 78 32 fd <0f> 0b 4c 8b 6c 24 10 48 b9 00 00 00 00 00 fc ff df ff 05 4c c5 e5
RSP: 0018:ffffc90003447a80 EFLAGS: 00010246
RAX: a20888e1a2630f00 RBX: ffffffff97d07c48 RCX: ffff88802dfb9e00
RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000002
RBP: ffffffff8a8df780 R08: ffffc90003447707 R09: 1ffff92000688ee0
R10: dffffc0000000000 R11: fffff52000688ee1 R12: 0000000000000001
R13: ffffffff82359fb0 R14: ffff88807d73c000 R15: ffff88807d73c728
FS:  0000000000000000(0000) GS:ffff8880b8c00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f354c412a80 CR3: 000000007f8d4000 CR4: 00000000003506f0
DR0: ffffffffffffffca DR1: 0000000400006892 DR2: 0000000000000010
DR3: 0100000000000401 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 slab_free_hook mm/slub.c:1704 [inline]
 slab_free_freelist_hook+0xd2/0x1b0 mm/slub.c:1755
 slab_free mm/slub.c:3687 [inline]
 __kmem_cache_free+0xb6/0x200 mm/slub.c:3700
 generic_shutdown_super+0x130/0x340 fs/super.c:501
 kill_block_super+0x7c/0xe0 fs/super.c:1481
 deactivate_locked_super+0x93/0xf0 fs/super.c:332
 cleanup_mnt+0x471/0x4f0 fs/namespace.c:1191
 task_work_run+0x1d0/0x260 kernel/task_work.c:203
 exit_task_work include/linux/task_work.h:39 [inline]
 do_exit+0x9d5/0x2570 kernel/exit.c:887
 do_group_exit+0x229/0x2e0 kernel/exit.c:1030
 __do_sys_exit_group kernel/exit.c:1041 [inline]
 __se_sys_exit_group kernel/exit.c:1039 [inline]
 __x64_sys_exit_group+0x3b/0x40 kernel/exit.c:1039
 do_syscall_x64 arch/x86/entry/common.c:46 [inline]
 do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:76
 entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7f2feed9e559
Code: Unable to access opcode bytes at 0x7f2feed9e52f.
RSP: 002b:00007ffc291e8648 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7
RAX: ffffffffffffffda RBX: 00007f2feee34f20 RCX: 00007f2feed9e559
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000001
RBP: 0000000000000002 R08: 0000000000000000 R09: 00007f2feee34efb
R10: 0000000000000000 R11: 0000000000000246 R12: 00007ffc291e9900
R13: 00007f2feee34efb R14: 0000000000078ecd R15: 00007ffc291ea9d0
 </TASK>

Crashes (98):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2026/10/17 03:22 linux-6.1.y 79807e970724 432c0077 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING: ODEBUG bug in generic_shutdown_super
2026/10/01 04:26 linux-6.1.y 1a8763b93150 38f7f0d1 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING: ODEBUG bug in generic_shutdown_super
2026/09/17 15:13 linux-6.1.y 1a8763b93150 95928915 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING: ODEBUG bug in generic_shutdown_super
2026/09/15 21:25 linux-6.1.y 1a8763b93150 2daa4bb5 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING: ODEBUG bug in generic_shutdown_super
2026/09/14 08:34 linux-6.1.y cf82dcca9634 70a60e12 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING: ODEBUG bug in generic_shutdown_super
2026/09/09 01:41 linux-6.1.y cf82dcca9634 243b72f1 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING: ODEBUG bug in generic_shutdown_super
2026/08/11 03:03 linux-6.1.y e4f7d8be268e 508909ea .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING: ODEBUG bug in generic_shutdown_super
2026/07/28 13:07 linux-6.1.y dc5c83b7f5f8 45ae1df4 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING: ODEBUG bug in generic_shutdown_super
2026/06/12 20:09 linux-6.1.y 228da13e907e 1d2f3589 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING: ODEBUG bug in generic_shutdown_super
2026/06/07 08:01 linux-6.1.y 228da13e907e cc095639 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING: ODEBUG bug in generic_shutdown_super
2026/06/06 10:56 linux-6.1.y 228da13e907e cc095639 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING: ODEBUG bug in generic_shutdown_super
2026/06/01 14:01 linux-6.1.y dcbcab9d7079 8d8eeb3a .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING: ODEBUG bug in generic_shutdown_super
2026/05/19 13:04 linux-6.1.y c27210688955 223544dc .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING: ODEBUG bug in generic_shutdown_super
2026/05/19 05:14 linux-6.1.y c27210688955 9f74d399 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING: ODEBUG bug in generic_shutdown_super
2026/05/14 13:18 linux-6.1.y ad16b162f21d 6ccb967e .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING: ODEBUG bug in generic_shutdown_super
2026/05/06 05:38 linux-6.1.y 4931e0e1673d 26da2c66 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING: ODEBUG bug in generic_shutdown_super
2026/05/05 16:13 linux-6.1.y 4931e0e1673d 06e69a27 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING: ODEBUG bug in generic_shutdown_super
2026/04/06 23:09 linux-6.1.y 1989cd3d56e2 4440e7c2 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING: ODEBUG bug in generic_shutdown_super
2026/03/03 21:36 linux-6.1.y 779f9571ac3e 4180d919 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING: ODEBUG bug in generic_shutdown_super
2026/03/01 10:27 linux-6.1.y 779f9571ac3e 43249bac .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING: ODEBUG bug in generic_shutdown_super
2026/02/24 20:44 linux-6.1.y 779f9571ac3e 96b1aa46 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING: ODEBUG bug in generic_shutdown_super
2026/02/24 08:45 linux-6.1.y 779f9571ac3e 41d2fa6a .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING: ODEBUG bug in generic_shutdown_super
2026/02/23 14:07 linux-6.1.y 779f9571ac3e 6beca497 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING: ODEBUG bug in generic_shutdown_super
2026/02/20 14:25 linux-6.1.y 779f9571ac3e 17d780d6 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING: ODEBUG bug in generic_shutdown_super
2026/01/05 20:49 linux-6.1.y 50cbba13faa2 d6526ea3 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING: ODEBUG bug in generic_shutdown_super
2025/12/15 12:29 linux-6.1.y 50cbba13faa2 d6526ea3 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING: ODEBUG bug in generic_shutdown_super
2025/12/14 11:42 linux-6.1.y 50cbba13faa2 d6526ea3 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING: ODEBUG bug in generic_shutdown_super
2025/09/22 15:42 linux-6.1.y 363a599da6d9 0ac7291c .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING: ODEBUG bug in generic_shutdown_super
2025/09/21 10:09 linux-6.1.y 363a599da6d9 67c37560 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING: ODEBUG bug in generic_shutdown_super
2025/09/17 01:03 linux-6.1.y 3db754f56897 e2beed91 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING: ODEBUG bug in generic_shutdown_super
2025/09/15 00:39 linux-6.1.y 3db754f56897 e2beed91 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING: ODEBUG bug in generic_shutdown_super
2025/09/14 23:05 linux-6.1.y 3db754f56897 e2beed91 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING: ODEBUG bug in generic_shutdown_super
2025/09/14 04:49 linux-6.1.y 3db754f56897 e2beed91 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING: ODEBUG bug in generic_shutdown_super
2025/09/08 01:57 linux-6.1.y 28c695c365e1 d291dd2d .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING: ODEBUG bug in generic_shutdown_super
2025/08/23 18:12 linux-6.1.y 0bc96de781b4 bf27483f .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING: ODEBUG bug in generic_shutdown_super
2025/08/13 05:18 linux-6.1.y 3594f306da12 22ec1469 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING: ODEBUG bug in generic_shutdown_super
2025/08/10 08:27 linux-6.1.y 3594f306da12 32a0e5ed .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING: ODEBUG bug in generic_shutdown_super
2025/08/07 08:21 linux-6.1.y 3594f306da12 9a42d6b1 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING: ODEBUG bug in generic_shutdown_super
2025/08/07 01:29 linux-6.1.y 3594f306da12 9a42d6b1 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING: ODEBUG bug in generic_shutdown_super
2025/08/06 04:31 linux-6.1.y 3594f306da12 ffe1dd46 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING: ODEBUG bug in generic_shutdown_super
2025/08/03 16:10 linux-6.1.y 3594f306da12 7368264b .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING: ODEBUG bug in generic_shutdown_super
2025/07/21 14:51 linux-6.1.y 3369c6df2fae 56d87229 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING: ODEBUG bug in generic_shutdown_super
2025/07/07 07:53 linux-6.1.y 04d1ccaa9c28 4f67c4ae .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING: ODEBUG bug in generic_shutdown_super
2025/06/29 13:31 linux-6.1.y 7e69c33e4858 fc9d8ee5 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING: ODEBUG bug in generic_shutdown_super
2025/05/23 11:14 linux-6.1.y da3c5173c55f fa44301a .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING: ODEBUG bug in generic_shutdown_super
2025/05/03 01:29 linux-6.1.y b6736e03756f b0714e37 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING: ODEBUG bug in generic_shutdown_super
2025/04/29 05:14 linux-6.1.y 535ec20c5027 aeb6ec69 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING: ODEBUG bug in generic_shutdown_super
2025/04/14 03:59 linux-6.1.y 420102835862 0bd6db41 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING: ODEBUG bug in generic_shutdown_super
2025/04/04 08:41 linux-6.1.y 8e60a714ba3b d7ae3a11 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING: ODEBUG bug in generic_shutdown_super
2024/08/06 15:06 linux-6.1.y 48d525b0e463 1ef9fe42 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING: ODEBUG bug in generic_shutdown_super
2024/06/14 10:20 linux-6.1.y ae9f2a70d69e 8d849073 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING: ODEBUG bug in generic_shutdown_super
2024/06/05 23:48 linux-6.1.y 88690811da69 5aa1a7c9 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING: ODEBUG bug in generic_shutdown_super
2024/05/08 19:11 linux-6.1.y 909ba1f1b414 20bf80e1 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING: ODEBUG bug in generic_shutdown_super
2024/05/06 03:13 linux-6.1.y 909ba1f1b414 610f2a54 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING: ODEBUG bug in generic_shutdown_super
2024/05/06 02:03 linux-6.1.y 909ba1f1b414 610f2a54 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING: ODEBUG bug in generic_shutdown_super
* Struck through repros no longer work on HEAD.