syzbot

ODEBUG: free active (active state 0) object type: timer_list hint: print_daily_error_info+0x0/0x490
WARNING: CPU: 1 PID: 7456 at lib/debugobjects.c:518 debug_print_object lib/debugobjects.c:515 [inline]
WARNING: CPU: 1 PID: 7456 at lib/debugobjects.c:518 __debug_check_no_obj_freed lib/debugobjects.c:979 [inline]
WARNING: CPU: 1 PID: 7456 at lib/debugobjects.c:518 debug_check_no_obj_freed+0x38e/0x4e0 lib/debugobjects.c:1009
Modules linked in:
CPU: 1 PID: 7456 Comm: syz.0.638 Not tainted 6.1.132-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025
RIP: 0010:debug_print_object lib/debugobjects.c:515 [inline]
RIP: 0010:__debug_check_no_obj_freed lib/debugobjects.c:979 [inline]
RIP: 0010:debug_check_no_obj_freed+0x38e/0x4e0 lib/debugobjects.c:1009
Code: ef e8 96 3c 99 fd 4c 8b 45 00 48 c7 c7 40 7a 5f 8b 48 c7 c6 00 77 5f 8b 48 c7 c2 a0 7b 5f 8b 8b 0c 24 49 89 d9 e8 c2 f0 09 fd <0f> 0b ff 05 f2 1b 58 0a 48 83 c5 30 48 89 e8 48 c1 e8 03 48 b9 00
RSP: 0018:ffffc90004ec76a0 EFLAGS: 00010246
RAX: 33e9009a5e83b900 RBX: ffffffff824aaad0 RCX: ffff88802dc09dc0
RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000000
RBP: ffffffff8b0dfaa0 R08: ffffffff8152c26e R09: fffffbfff2257660
R10: 0000000000000000 R11: dffffc0000000001 R12: ffff88807b606698
R13: ffffffff97606650 R14: ffff88807b607000 R15: ffff8880581632f8
FS:  0000000000000000(0000) GS:ffff8880b8f00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fb80d7a7bac CR3: 000000007a6ed000 CR4: 00000000003506e0
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:1470
 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:203
 exit_task_work include/linux/task_work.h:39 [inline]
 do_exit+0xa6e/0x26a0 kernel/exit.c:871
 do_group_exit+0x202/0x2b0 kernel/exit.c:1021
 get_signal+0x16cb/0x17a0 kernel/signal.c:2871
 arch_do_signal_or_restart+0xb0/0x1a10 arch/x86/kernel/signal.c:871
 exit_to_user_mode_loop+0x6a/0x100 kernel/entry/common.c:174
 exit_to_user_mode_prepare+0xb1/0x140 kernel/entry/common.c:210
 __syscall_exit_to_user_mode_work kernel/entry/common.c:292 [inline]
 syscall_exit_to_user_mode+0x60/0x270 kernel/entry/common.c:303
 do_syscall_64+0x47/0xb0 arch/x86/entry/common.c:87
 entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7efd181bfa25
Code: Unable to access opcode bytes at 0x7efd181bf9fb.
RSP: 002b:00007efd18f5bf80 EFLAGS: 00000293 ORIG_RAX: 00000000000000e6
RAX: fffffffffffffdfc RBX: 00007efd183a5fa0 RCX: 00007efd181bfa25
RDX: 00007efd18f5bfc0 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 00007efd1820e2a0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000293 R12: 0000000000000000
R13: 0000000000000001 R14: 00007efd183a5fa0 R15: 00007fffe266da78
 </TASK>