syzbot

ODEBUG: free active (active state 0) object type: timer_list hint: descriptor_loc fs/ext4/super.c:-1 [inline]
ODEBUG: free active (active state 0) object type: timer_list hint: print_daily_error_info+0x0/0x480 fs/ext4/super.c:4776
WARNING: CPU: 0 PID: 10216 at lib/debugobjects.c:518 debug_print_object lib/debugobjects.c:515 [inline]
WARNING: CPU: 0 PID: 10216 at lib/debugobjects.c:518 __debug_check_no_obj_freed lib/debugobjects.c:979 [inline]
WARNING: CPU: 0 PID: 10216 at lib/debugobjects.c:518 debug_check_no_obj_freed+0x43c/0x530 lib/debugobjects.c:1009
Modules linked in:
CPU: 0 PID: 10216 Comm: syz-executor Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/18/2026
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+0x43c/0x530 lib/debugobjects.c:1009
Code: ef e8 88 b6 bd fd 4c 8b 45 00 48 c7 c7 80 16 df 8a 48 c7 c6 40 13 df 8a 48 c7 c2 e0 17 df 8a 8b 0c 24 4d 89 e9 e8 e4 1b 38 fd <0f> 0b 4c 8b 6c 24 18 48 b9 00 00 00 00 00 fc ff df ff 05 65 4a 0a
RSP: 0000:ffffc9000596fa68 EFLAGS: 00010246
RAX: 7cb3ba66bf210900 RBX: ffffffff96f17738 RCX: ffff88802c715940
RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000002
RBP: ffffffff8a8dedc0 R08: ffffc9000596f6e7 R09: 1ffff92000b2dedc
R10: dffffc0000000000 R11: fffff52000b2dedd R12: ffff888064285000
R13: ffffffff82358620 R14: ffff888064284000 R15: ffff888064284698
FS:  0000000000000000(0000) GS:ffff8880b8e00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fcb57969000 CR3: 0000000073b03000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 slab_free_hook mm/slub.c:1704 [inline]
 slab_free_freelist_hook+0xd2/0x1a0 mm/slub.c:1755
 slab_free mm/slub.c:3687 [inline]
 __kmem_cache_free+0xb6/0x1f0 mm/slub.c:3700
 generic_shutdown_super+0x130/0x340 fs/super.c:501
 kill_block_super+0x7c/0xe0 fs/super.c:1470
 deactivate_locked_super+0x93/0xf0 fs/super.c:332
 cleanup_mnt+0x42c/0x4b0 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+0x982/0x2480 kernel/exit.c:880
 do_group_exit+0x217/0x2d0 kernel/exit.c:1022
 __do_sys_exit_group kernel/exit.c:1033 [inline]
 __se_sys_exit_group kernel/exit.c:1031 [inline]
 __x64_sys_exit_group+0x3b/0x40 kernel/exit.c:1031
 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: 0033:0x7f472899c819
Code: Unable to access opcode bytes at 0x7f472899c7ef.
RSP: 002b:00007ffc56f11a68 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7
RAX: ffffffffffffffda RBX: 00007f4728a3206d RCX: 00007f472899c819
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000001
RBP: 0000000000000002 R08: 0000000000000000 R09: 00007f4728a32048
R10: 0000000000000000 R11: 0000000000000246 R12: 00007ffc56f12d20
R13: 00007f4728a32048 R14: 00000000000a257d R15: 00007ffc56f13df0
 </TASK>