syzbot


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: 40d, last: 1d08h
Similar bugs (1)
Kernel Title Repro Cause bisect Fix bisect Count Last Reported Patched Status
linux-6.1 WARNING: ODEBUG bug in generic_shutdown_super 2 171d 249d 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+0x0/0x490
WARNING: CPU: 0 PID: 7734 at lib/debugobjects.c:517 debug_print_object lib/debugobjects.c:514 [inline]
WARNING: CPU: 0 PID: 7734 at lib/debugobjects.c:517 __debug_check_no_obj_freed lib/debugobjects.c:978 [inline]
WARNING: CPU: 0 PID: 7734 at lib/debugobjects.c:517 debug_check_no_obj_freed+0x38e/0x4e0 lib/debugobjects.c:1008
Modules linked in:
CPU: 0 PID: 7734 Comm: syz-executor.0 Not tainted 6.1.93-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/07/2024
RIP: 0010:debug_print_object lib/debugobjects.c:514 [inline]
RIP: 0010:__debug_check_no_obj_freed lib/debugobjects.c:978 [inline]
RIP: 0010:debug_check_no_obj_freed+0x38e/0x4e0 lib/debugobjects.c:1008
Code: ef e8 06 de a4 fd 4c 8b 45 00 48 c7 c7 80 4e 3d 8b 48 c7 c6 40 4b 3d 8b 48 c7 c2 e0 4f 3d 8b 8b 0c 24 49 89 d9 e8 52 5b 15 fd <0f> 0b ff 05 02 92 36 0a 48 83 c5 30 48 89 e8 48 c1 e8 03 48 b9 00
RSP: 0018:ffffc9000f787a80 EFLAGS: 00010246
RAX: 3dc3c07807152b00 RBX: ffffffff824a9df0 RCX: ffff888021555940
RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000000
RBP: ffffffff8aedd980 R08: ffffffff815292de R09: fffffbfff2093a58
R10: 0000000000000000 R11: dffffc0000000001 R12: ffff8880775fa698
R13: ffffffff91f2d700 R14: ffff8880775fb000 R15: ffff88807ee6f6e8
FS:  0000000000000000(0000) GS:ffff8880b9800000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f9f96ce56c6 CR3: 00000000220bb000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 slab_free_hook mm/slub.c:1699 [inline]
 slab_free_freelist_hook mm/slub.c:1750 [inline]
 slab_free mm/slub.c:3661 [inline]
 __kmem_cache_free+0x205/0x3c0 mm/slub.c:3674
 generic_shutdown_super+0x130/0x340 fs/super.c:501
 kill_block_super+0x7a/0xe0 fs/super.c:1459
 deactivate_locked_super+0xa0/0x110 fs/super.c:332
 cleanup_mnt+0x490/0x520 fs/namespace.c:1186
 task_work_run+0x246/0x300 kernel/task_work.c:179
 exit_task_work include/linux/task_work.h:38 [inline]
 do_exit+0xa73/0x26a0 kernel/exit.c:869
 do_group_exit+0x202/0x2b0 kernel/exit.c:1019
 __do_sys_exit_group kernel/exit.c:1030 [inline]
 __se_sys_exit_group kernel/exit.c:1028 [inline]
 __x64_sys_exit_group+0x3b/0x40 kernel/exit.c:1028
 do_syscall_x64 arch/x86/entry/common.c:51 [inline]
 do_syscall_64+0x3b/0xb0 arch/x86/entry/common.c:81
 entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7f696467cea9
Code: Unable to access opcode bytes at 0x7f696467ce7f.
RSP: 002b:00007ffc303dd508 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7
RAX: ffffffffffffffda RBX: 00007f69646d96a8 RCX: 00007f696467cea9
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000001
RBP: 0000000000000010 R08: 00007ffc303db2a6 R09: 00007ffc303de7c0
R10: 0000000000000000 R11: 0000000000000246 R12: 00007ffc303de7c0
R13: 00007f69646d9636 R14: 0000555556b6d430 R15: 0000000000000008
 </TASK>

Crashes (5):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
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.