------------[ cut here ]------------
ODEBUG: free active (active state 0) object type: timer_list hint: print_daily_error_info+0x0/0x4b0 fs/ext4/ext4.h:2034
WARNING: CPU: 1 PID: 20379 at lib/debugobjects.c:508 debug_print_object lib/debugobjects.c:505 [inline]
WARNING: CPU: 1 PID: 20379 at lib/debugobjects.c:508 __debug_check_no_obj_freed lib/debugobjects.c:987 [inline]
WARNING: CPU: 1 PID: 20379 at lib/debugobjects.c:508 debug_check_no_obj_freed+0x44b/0x650 lib/debugobjects.c:1018
Modules linked in:
CPU: 1 PID: 20379 Comm: syz-executor.3 Not tainted 5.12.0-rc2-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:debug_print_object lib/debugobjects.c:505 [inline]
RIP: 0010:__debug_check_no_obj_freed lib/debugobjects.c:987 [inline]
RIP: 0010:debug_check_no_obj_freed+0x44b/0x650 lib/debugobjects.c:1018
Code: 4c 89 ef e8 37 ca eb fd 4d 8b 45 00 48 c7 c7 60 57 0e 8a 48 c7 c6 80 53 0e 8a 48 89 da 44 89 f1 4d 89 f9 31 c0 e8 05 a8 76 fd <0f> 0b 48 ba 00 00 00 00 00 fc ff df ff 05 2f 06 e4 09 48 8b 5c 24
RSP: 0018:ffffc900199afa58 EFLAGS: 00010246
RAX: 2f49a6a1ecaf5000 RBX: ffffffff8a0e5920 RCX: 0000000000040000
RDX: ffffc9000f4d7000 RSI: 0000000000010fe2 RDI: 0000000000010fe3
RBP: ffff88802879aec0 R08: ffffffff81605e52 R09: ffffed10173a5fe8
R10: ffffed10173a5fe8 R11: 0000000000000000 R12: ffff88802879aebc
R13: ffffffff89b0a7a0 R14: 0000000000000000 R15: ffffffff821e0760
FS:  00007fc714e12700(0000) GS:ffff8880b9d00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000055c9b3550888 CR3: 0000000029e64000 CR4: 00000000001506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 slab_free_hook mm/slub.c:1554 [inline]
 slab_free_freelist_hook+0x161/0x270 mm/slub.c:1600
 slab_free mm/slub.c:3161 [inline]
 kfree+0xcf/0x2d0 mm/slub.c:4213
 ext4_fill_super+0x2200/0xfc30 fs/ext4/super.c:5182
 mount_bdev+0x26c/0x3a0 fs/super.c:1367
 legacy_get_tree+0xea/0x180 fs/fs_context.c:592
 vfs_get_tree+0x86/0x270 fs/super.c:1497
 do_new_mount fs/namespace.c:2903 [inline]
 path_mount+0x188a/0x29a0 fs/namespace.c:3233
 do_mount fs/namespace.c:3246 [inline]
 __do_sys_mount fs/namespace.c:3454 [inline]
 __se_sys_mount+0x28c/0x320 fs/namespace.c:3431
 do_syscall_64+0x2d/0x70 arch/x86/entry/common.c:46
 entry_SYSCALL_64_after_hwframe+0x44/0xae
RIP: 0033:0x46748a
Code: 48 c7 c2 bc ff ff ff f7 d8 64 89 02 b8 ff ff ff ff eb d2 e8 b8 04 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 bc ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007fc714e11fa8 EFLAGS: 00000206 ORIG_RAX: 00000000000000a5
RAX: ffffffffffffffda RBX: 0000000020000200 RCX: 000000000046748a
RDX: 0000000020000000 RSI: 0000000020000100 RDI: 00007fc714e12000
RBP: 00007fc714e12040 R08: 00007fc714e12040 R09: 0000000020000000
R10: 0000000000000000 R11: 0000000000000206 R12: 0000000020000000
R13: 0000000020000100 R14: 00007fc714e12000 R15: 00000000200000c0