------------[ cut here ]------------ ODEBUG: free active (active state 0) object type: timer_list hint: print_daily_error_info+0x0/0x1f0 fs/ext4/super.c:1334 WARNING: CPU: 0 PID: 16165 at lib/debugobjects.c:505 debug_print_object+0x16e/0x250 lib/debugobjects.c:505 Modules linked in: CPU: 0 PID: 16165 Comm: syz-executor.1 Not tainted 5.12.0-rc1-syzkaller #0 Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.14.0-2 04/01/2014 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 60 56 bf 89 4c 89 ee 48 c7 c7 60 4a bf 89 e8 6e 51 fb 04 <0f> 0b 83 05 e5 4f 00 0a 01 48 83 c4 18 5b 5d 41 5c 41 5d 41 5e c3 RSP: 0018:ffffc9000d70f968 EFLAGS: 00010286 RAX: 0000000000000000 RBX: 0000000000000003 RCX: 0000000000000000 RDX: 0000000000040000 RSI: ffffffff815bb175 RDI: fffff52001ae1f1f RBP: 0000000000000001 R08: 0000000000000000 R09: 0000000000000000 R10: ffffffff815b424e R11: 0000000000000000 R12: ffffffff896d7980 R13: ffffffff89bf50a0 R14: ffffffff81623ec0 R15: dffffc0000000000 FS: 0000000000000000(0000) GS:ffff88802ca00000(0063) knlGS:00000000f558cb40 CS: 0010 DS: 002b ES: 002b CR0: 0000000080050033 CR2: 00000000f556ae78 CR3: 00000000784a4000 CR4: 0000000000150ef0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 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:1554 [inline] slab_free_freelist_hook+0xd6/0x1b0 mm/slub.c:1600 slab_free mm/slub.c:3161 [inline] kfree+0xe5/0x7b0 mm/slub.c:4213 ext4_fill_super+0x84f/0xded0 fs/ext4/super.c:5182 mount_bdev+0x34d/0x410 fs/super.c:1367 legacy_get_tree+0x105/0x220 fs/fs_context.c:592 vfs_get_tree+0x89/0x2f0 fs/super.c:1497 do_new_mount fs/namespace.c:2903 [inline] path_mount+0x132a/0x1f90 fs/namespace.c:3233 do_mount fs/namespace.c:3246 [inline] __do_sys_mount fs/namespace.c:3454 [inline] __se_sys_mount fs/namespace.c:3431 [inline] __ia32_sys_mount+0x27e/0x300 fs/namespace.c:3431 do_syscall_32_irqs_on arch/x86/entry/common.c:77 [inline] __do_fast_syscall_32+0x56/0x80 arch/x86/entry/common.c:139 do_fast_syscall_32+0x2f/0x70 arch/x86/entry/common.c:164 entry_SYSENTER_compat_after_hwframe+0x4d/0x5c RIP: 0023:0xf7f92549 Code: 03 74 c0 01 10 05 03 74 b8 01 10 06 03 74 b4 01 10 07 03 74 b0 01 10 08 03 74 d8 01 00 00 00 00 00 51 52 55 89 e5 0f 34 cd 80 <5d> 5a 59 c3 90 90 90 90 8d b4 26 00 00 00 00 8d b4 26 00 00 00 00 RSP: 002b:00000000f558c440 EFLAGS: 00000296 ORIG_RAX: 0000000000000015 RAX: ffffffffffffffda RBX: 00000000f558c4b0 RCX: 00000000200005c0 RDX: 0000000020000000 RSI: 0000000000000000 RDI: 00000000f558c4f0 RBP: 00000000f558c4f0 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000 R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000