ODEBUG: free active (active state 0) object type: timer_list hint: print_daily_error_info+0x0/0x1f0 fs/ext4/super.c:1334 WARNING: CPU: 1 PID: 14902 at lib/debugobjects.c:505 debug_print_object+0x16e/0x250 lib/debugobjects.c:505 Modules linked in: CPU: 1 PID: 14902 Comm: syz-executor520 Not tainted 5.11.0-rc7-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:debug_print_object+0x16e/0x250 lib/debugobjects.c:505 Code: ff df 48 89 fa 48 c1 ea 03 80 3c 02 00 0f 85 af 00 00 00 48 8b 14 dd 40 f0 9e 89 4c 89 ee 48 c7 c7 40 e4 9e 89 e8 dc 8b f6 04 <0f> 0b 83 05 85 82 e0 09 01 48 83 c4 18 5b 5d 41 5c 41 5d 41 5e c3 RSP: 0018:ffffc9000940f9b8 EFLAGS: 00010282 RAX: 0000000000000000 RBX: 0000000000000003 RCX: 0000000000000000 RDX: ffff88801fa21bc0 RSI: ffffffff815b73e5 RDI: fffff52001281f29 RBP: 0000000000000001 R08: 0000000000000000 R09: 0000000000000000 R10: ffffffff815b05be R11: 0000000000000000 R12: ffffffff894d8b20 R13: ffffffff899eea80 R14: ffffffff8161d440 R15: dffffc0000000000 FS: 00000000014bb300(0000) GS:ffff8880b9c00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007ffd89f9db78 CR3: 00000000191c1000 CR4: 0000000000350ef0 Call Trace: __debug_check_no_obj_freed lib/debugobjects.c:987 [inline] debug_check_no_obj_freed+0x301/0x420 lib/debugobjects.c:1018 slab_free_hook mm/slub.c:1539 [inline] slab_free_freelist_hook+0x107/0x150 mm/slub.c:1580 slab_free mm/slub.c:3143 [inline] kfree+0xdb/0x3b0 mm/slub.c:4139 ext4_fill_super+0x84f/0xde80 fs/ext4/super.c:5175 mount_bdev+0x34d/0x410 fs/super.c:1366 legacy_get_tree+0x105/0x220 fs/fs_context.c:592 vfs_get_tree+0x89/0x2f0 fs/super.c:1496 do_new_mount fs/namespace.c:2881 [inline] path_mount+0x13ad/0x20c0 fs/namespace.c:3211 do_mount fs/namespace.c:3224 [inline] __do_sys_mount fs/namespace.c:3432 [inline] __se_sys_mount fs/namespace.c:3409 [inline] __x64_sys_mount+0x27f/0x300 fs/namespace.c:3409 do_syscall_64+0x2d/0x70 arch/x86/entry/common.c:46 entry_SYSCALL_64_after_hwframe+0x44/0xa9 RIP: 0033:0x44642a Code: 48 c7 c2 c0 ff ff ff f7 d8 64 89 02 b8 ff ff ff ff eb d2 e8 a8 00 00 00 0f 1f 84 00 00 00 00 00 49 89 ca b8 a5 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 c0 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007ffd89f9da08 EFLAGS: 00000206 ORIG_RAX: 00000000000000a5 RAX: ffffffffffffffda RBX: 00007ffd89f9da60 RCX: 000000000044642a RDX: 0000000020000000 RSI: 0000000020000100 RDI: 00007ffd89f9da20 RBP: 00007ffd89f9da20 R08: 00007ffd89f9da60 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000206 R12: 0000000020000260 R13: 0000000000000004 R14: 0000000000000005 R15: 0000000000000004 irq event stamp: 4059 hardirqs last enabled at (4069): [] console_unlock+0xafa/0xbb0 kernel/printk/printk.c:2574 hardirqs last disabled at (4080): [] sysvec_apic_timer_interrupt+0xc/0x100 arch/x86/kernel/apic/apic.c:1100 softirqs last enabled at (3870): [] asm_call_irq_on_stack+0xf/0x20 softirqs last disabled at (3861): [] asm_call_irq_on_stack+0xf/0x20 ---[ end trace 50a8b5a2caef60a8 ]---