syzbot

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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:4771
WARNING: CPU: 0 PID: 15837 at lib/debugobjects.c:518 debug_print_object lib/debugobjects.c:515 [inline]
WARNING: CPU: 0 PID: 15837 at lib/debugobjects.c:518 __debug_check_no_obj_freed lib/debugobjects.c:979 [inline]
WARNING: CPU: 0 PID: 15837 at lib/debugobjects.c:518 debug_check_no_obj_freed+0x43c/0x530 lib/debugobjects.c:1009
Modules linked in:
CPU: 0 PID: 15837 Comm: syz-executor Not tainted 6.1.140-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025
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+0x43c/0x530 lib/debugobjects.c:1009
Code: ef e8 d8 26 c6 fd 4c 8b 45 00 48 c7 c7 c0 1b bf 8a 48 c7 c6 80 18 bf 8a 48 c7 c2 20 1d bf 8a 8b 0c 24 4d 89 e9 e8 74 c1 40 fd <0f> 0b 4c 8b 6c 24 18 48 b9 00 00 00 00 00 fc ff df ff 05 95 8e f2
RSP: 0018:ffffc90003307a88 EFLAGS: 00010246
RAX: 596ba0d8c3403b00 RBX: ffffffff96be0b68 RCX: ffff88807b6a8000
RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000002
RBP: ffffffff8a6ddd20 R08: dffffc0000000000 R09: fffff52000660ee1
R10: fffff52000660ee1 R11: 1ffff92000660ee0 R12: ffff888027f13000
R13: ffffffff82331be0 R14: ffff888027f12000 R15: ffff888027f12698
FS:  0000000000000000(0000) GS:ffff8880b8e00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fc694001000 CR3: 0000000065a50000 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+0xd2/0x1a0 mm/slub.c:1750
 slab_free mm/slub.c:3661 [inline]
 __kmem_cache_free+0xb6/0x1f0 mm/slub.c:3674
 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+0x463/0x4f0 fs/namespace.c:1186
 task_work_run+0x1ca/0x250 kernel/task_work.c:203
 exit_task_work include/linux/task_work.h:39 [inline]
 do_exit+0x936/0x2400 kernel/exit.c:871
 do_group_exit+0x217/0x2d0 kernel/exit.c:1021
 __do_sys_exit_group kernel/exit.c:1032 [inline]
 __se_sys_exit_group kernel/exit.c:1030 [inline]
 __x64_sys_exit_group+0x3b/0x40 kernel/exit.c:1030
 do_syscall_x64 arch/x86/entry/common.c:51 [inline]
 do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:81
 entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7fa22838e969
Code: Unable to access opcode bytes at 0x7fa22838e93f.
RSP: 002b:00007ffeab9e61d8 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7
RAX: ffffffffffffffda RBX: 00007fa228410921 RCX: 00007fa22838e969
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000001
RBP: 0000000000000027 R08: 00007ffeab9e3f76 R09: 00007ffeab9e7490
R10: 0000000000000000 R11: 0000000000000246 R12: 00007ffeab9e7490
R13: 00007fa22841089d R14: 000055556cb8a4a8 R15: 00007ffeab9e9650
 </TASK>