------------[ cut here ]------------
ODEBUG: free active (active state 1) object type: rcu_head hint:           (null)
WARNING: CPU: 0 PID: 7379 at lib/debugobjects.c:325 debug_print_object+0x168/0x250 lib/debugobjects.c:325
Kernel panic - not syncing: panic_on_warn set ...

CPU: 0 PID: 7379 Comm: syz-executor.4 Not tainted 4.19.75 #0
cgroup: fork rejected by pids controller in 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
/syz3
Call Trace:
 __dump_stack lib/dump_stack.c:77 [inline]
 dump_stack+0x172/0x1f0 lib/dump_stack.c:113
 panic+0x263/0x507 kernel/panic.c:185
 __warn.cold+0x20/0x4a kernel/panic.c:540
 report_bug+0x263/0x2b0 lib/bug.c:186
 fixup_bug arch/x86/kernel/traps.c:178 [inline]
 fixup_bug arch/x86/kernel/traps.c:173 [inline]
 do_error_trap+0x204/0x360 arch/x86/kernel/traps.c:296
 do_invalid_op+0x1b/0x20 arch/x86/kernel/traps.c:316
 invalid_op+0x14/0x20 arch/x86/entry/entry_64.S:1037
RIP: 0010:debug_print_object+0x168/0x250 lib/debugobjects.c:325
Code: dd 20 56 82 87 48 89 fa 48 c1 ea 03 80 3c 02 00 0f 85 b5 00 00 00 48 8b 14 dd 20 56 82 87 48 c7 c7 60 4b 82 87 e8 d6 04 19 fe <0f> 0b 83 05 cb 83 17 06 01 48 83 c4 20 5b 41 5c 41 5d 41 5e 5d c3
RSP: 0018:ffff88808a9bf138 EFLAGS: 00010086
RAX: 0000000000000000 RBX: 0000000000000003 RCX: 0000000000000000
RDX: 0000000000000000 RSI: ffffffff8155dbd6 RDI: ffffed1011537e19
RBP: ffff88808a9bf178 R08: ffff88808a9b2100 R09: ffffed1015d03ee3
R10: ffffed1015d03ee2 R11: ffff8880ae81f717 R12: 0000000000000001
R13: ffffffff8879f200 R14: 0000000000000000 R15: ffff88804ce1b420
 __debug_check_no_obj_freed lib/debugobjects.c:785 [inline]
 debug_check_no_obj_freed+0x29f/0x464 lib/debugobjects.c:817
 kmem_cache_free+0x18f/0x260 mm/slab.c:3764
 free_task_struct kernel/fork.c:162 [inline]
 free_task+0xdd/0x120 kernel/fork.c:416
 __put_task_struct+0x20f/0x4c0 kernel/fork.c:689
 put_task_struct include/linux/sched/task.h:96 [inline]
 finish_task_switch+0x52b/0x780 kernel/sched/core.c:2710
 context_switch kernel/sched/core.c:2829 [inline]
 __schedule+0x86e/0x1dc0 kernel/sched/core.c:3474
 preempt_schedule_common+0x4f/0xe0 kernel/sched/core.c:3598
 preempt_schedule+0x4b/0x60 kernel/sched/core.c:3624
 ___preempt_schedule+0x16/0x18
 __raw_spin_unlock include/linux/spinlock_api_smp.h:152 [inline]
 _raw_spin_unlock+0x41/0x50 kernel/locking/spinlock.c:176
 spin_unlock include/linux/spinlock.h:369 [inline]
 ext4_do_update_inode fs/ext4/inode.c:5319 [inline]
 ext4_mark_iloc_dirty+0x16d0/0x2da0 fs/ext4/inode.c:5859
 ext4_mark_inode_dirty+0x245/0x940 fs/ext4/inode.c:6038
 ext4_dirty_inode+0x8f/0xc0 fs/ext4/inode.c:6069
 __mark_inode_dirty+0x915/0x1280 fs/fs-writeback.c:2173
 mark_inode_dirty_sync include/linux/fs.h:2087 [inline]
 dquot_free_space include/linux/quotaops.h:373 [inline]
 dquot_free_block include/linux/quotaops.h:383 [inline]
 ext4_free_blocks+0x156d/0x23c0 fs/ext4/mballoc.c:4919
 ext4_remove_blocks fs/ext4/extents.c:2578 [inline]
 ext4_ext_rm_leaf fs/ext4/extents.c:2734 [inline]
 ext4_ext_remove_space+0x2575/0x40c0 fs/ext4/extents.c:2967
 ext4_ext_truncate+0x1b5/0x200 fs/ext4/extents.c:4661
 ext4_truncate+0xdf9/0x13d0 fs/ext4/inode.c:4514
 ext4_evict_inode+0xa2f/0x1890 fs/ext4/inode.c:289
 evict+0x306/0x680 fs/inode.c:558
 iput_final fs/inode.c:1547 [inline]
 iput fs/inode.c:1573 [inline]
 iput+0x4fe/0x880 fs/inode.c:1559
 dentry_unlink_inode+0x28f/0x350 fs/dcache.c:374
 d_delete+0x1e1/0x230 fs/dcache.c:2370
 vfs_rmdir fs/namei.c:3892 [inline]
 vfs_rmdir+0x389/0x460 fs/namei.c:3858
 do_rmdir+0x39e/0x420 fs/namei.c:3940
 __do_sys_rmdir fs/namei.c:3958 [inline]
 __se_sys_rmdir fs/namei.c:3956 [inline]
 __x64_sys_rmdir+0x36/0x40 fs/namei.c:3956
 do_syscall_64+0xfd/0x620 arch/x86/entry/common.c:293
 entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x459797
Code: 00 66 90 b8 57 00 00 00 0f 05 48 3d 01 f0 ff ff 0f 83 7d ba fb ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 90 b8 54 00 00 00 0f 05 <48> 3d 01 f0 ff ff 0f 83 5d ba fb ff c3 66 2e 0f 1f 84 00 00 00 00
RSP: 002b:00007ffec3a6c7c8 EFLAGS: 00000207 ORIG_RAX: 0000000000000054
RAX: ffffffffffffffda RBX: 0000000000000065 RCX: 0000000000459797
RDX: 0000000000000000 RSI: 0000000000715698 RDI: 00007ffec3a6d900
RBP: 0000000000000098 R08: 0000000000000000 R09: 0000000000000001
R10: 000000000000000a R11: 0000000000000207 R12: 00007ffec3a6d900
R13: 0000555556557940 R14: 0000000000000000 R15: 00007ffec3a6d900

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