rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: 	1-...0: (1 GPs behind) idle=e0f/1/0x4000000000000000 softirq=103516/103519 fqs=5248 
	(detected by 0, t=10502 jiffies, g=136793, q=964)
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 PID: 3615 Comm: syz-executor.4 Not tainted 5.16.0-rc8-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:preempt_count arch/x86/include/asm/preempt.h:27 [inline]
RIP: 0010:check_preemption_disabled+0x22/0x170 lib/smp_processor_id.c:16
Code: e9 23 ff ff ff cc cc cc 41 56 41 55 49 89 f5 41 54 55 48 89 fd 53 0f 1f 44 00 00 65 44 8b 25 7d 08 be 76 65 8b 1d ee 62 be 76 <81> e3 ff ff ff 7f 31 ff 89 de 0f 1f 44 00 00 85 db 74 11 0f 1f 44
RSP: 0018:ffffc90000dc0ce8 EFLAGS: 00000082
RAX: 0000000000000001 RBX: 0000000080010004 RCX: ffffffff815cb298
RDX: 0000000000000001 RSI: ffffffff8a0528e0 RDI: ffffffff8a052920
RBP: ffffffff8a052920 R08: 0000000000000000 R09: ffffffff8d915b17
R10: fffffbfff1b22b62 R11: 0000000000000000 R12: 0000000000000001
R13: ffffffff8a0528e0 R14: ffff8880b9d2a418 R15: 0000000000000000
FS:  0000555556e39400(0000) GS:ffff8880b9d00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f1b11e63158 CR3: 0000000051c0b000 CR4: 0000000000350ee0
Call Trace:
 <IRQ>
 rcu_dynticks_curr_cpu_in_eqs kernel/rcu/tree.c:330 [inline]
 rcu_is_watching+0xe/0xb0 kernel/rcu/tree.c:1121
 rcu_read_lock_held_common kernel/rcu/update.c:108 [inline]
 rcu_read_lock_sched_held+0x1c/0x70 kernel/rcu/update.c:123
 trace_lock_acquire include/trace/events/lock.h:13 [inline]
 lock_acquire+0x442/0x510 kernel/locking/lockdep.c:5608
 __raw_spin_lock_irq include/linux/spinlock_api_smp.h:119 [inline]
 _raw_spin_lock_irq+0x32/0x50 kernel/locking/spinlock.c:170
 __run_hrtimer kernel/time/hrtimer.c:1689 [inline]
 __hrtimer_run_queues+0x243/0xe50 kernel/time/hrtimer.c:1749
 hrtimer_interrupt+0x31c/0x790 kernel/time/hrtimer.c:1811
 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1086 [inline]
 __sysvec_apic_timer_interrupt+0x146/0x530 arch/x86/kernel/apic/apic.c:1103
 sysvec_apic_timer_interrupt+0x8e/0xc0 arch/x86/kernel/apic/apic.c:1097
 </IRQ>
 <TASK>
 asm_sysvec_apic_timer_interrupt+0x12/0x20 arch/x86/include/asm/idtentry.h:638
RIP: 0010:__raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:152 [inline]
RIP: 0010:_raw_spin_unlock_irqrestore+0x38/0x70 kernel/locking/spinlock.c:194
Code: 74 24 10 e8 fa cb 15 f8 48 89 ef e8 b2 41 16 f8 81 e3 00 02 00 00 75 25 9c 58 f6 c4 02 75 2d 48 85 db 74 01 fb bf 01 00 00 00 <e8> f3 0b 09 f8 65 8b 05 0c 91 bb 76 85 c0 74 0a 5b 5d c3 e8 20 f3
RSP: 0018:ffffc9000287f968 EFLAGS: 00000206
RAX: 0000000000000006 RBX: 0000000000000200 RCX: 1ffffffff1ff659e
RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000001
RBP: ffffffff90747070 R08: 0000000000000001 R09: ffffffff8ff76a9f
R10: 0000000000000001 R11: 0000000000000001 R12: 1ffffffff20e8e0d
R13: 0000000000000000 R14: dead000000000100 R15: dffffc0000000000
 __debug_check_no_obj_freed lib/debugobjects.c:1002 [inline]
 debug_check_no_obj_freed+0x20c/0x420 lib/debugobjects.c:1023
 slab_free_hook mm/slub.c:1698 [inline]
 slab_free_freelist_hook+0xeb/0x1c0 mm/slub.c:1749
 slab_free mm/slub.c:3513 [inline]
 kfree+0xf6/0x560 mm/slub.c:4561
 tomoyo_realpath_from_path+0x191/0x620 security/tomoyo/realpath.c:291
 tomoyo_get_realpath security/tomoyo/file.c:151 [inline]
 tomoyo_path_perm+0x21b/0x400 security/tomoyo/file.c:822
 tomoyo_path_rmdir+0x8e/0xd0 security/tomoyo/tomoyo.c:182
 security_path_rmdir+0xd7/0x150 security/security.c:1149
 do_rmdir+0x284/0x430 fs/namei.c:4026
 __do_sys_rmdir fs/namei.c:4049 [inline]
 __se_sys_rmdir fs/namei.c:4047 [inline]
 __x64_sys_rmdir+0xc6/0x110 fs/namei.c:4047
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x44/0xae
RIP: 0033:0x7f99d8a98807
Code: 73 01 c3 48 c7 c1 bc ff ff ff f7 d8 64 89 01 48 83 c8 ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 b8 54 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:00007fff993515b8 EFLAGS: 00000207 ORIG_RAX: 0000000000000054
RAX: ffffffffffffffda RBX: 0000000000000065 RCX: 00007f99d8a98807
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 00007fff99352740
RBP: 00007fff99351680 R08: 0000000000000000 R09: 00007fff99351450
R10: 0000555556e3a8e3 R11: 0000000000000207 R12: 00007f99d8af2172
R13: 00007fff99352740 R14: 0000555556e3a810 R15: 00007fff99352780
 </TASK>
----------------
Code disassembly (best guess):
   0:	e9 23 ff ff ff       	jmpq   0xffffff28
   5:	cc                   	int3
   6:	cc                   	int3
   7:	cc                   	int3
   8:	41 56                	push   %r14
   a:	41 55                	push   %r13
   c:	49 89 f5             	mov    %rsi,%r13
   f:	41 54                	push   %r12
  11:	55                   	push   %rbp
  12:	48 89 fd             	mov    %rdi,%rbp
  15:	53                   	push   %rbx
  16:	0f 1f 44 00 00       	nopl   0x0(%rax,%rax,1)
  1b:	65 44 8b 25 7d 08 be 	mov    %gs:0x76be087d(%rip),%r12d        # 0x76be08a0
  22:	76
  23:	65 8b 1d ee 62 be 76 	mov    %gs:0x76be62ee(%rip),%ebx        # 0x76be6318
* 2a:	81 e3 ff ff ff 7f    	and    $0x7fffffff,%ebx <-- trapping instruction
  30:	31 ff                	xor    %edi,%edi
  32:	89 de                	mov    %ebx,%esi
  34:	0f 1f 44 00 00       	nopl   0x0(%rax,%rax,1)
  39:	85 db                	test   %ebx,%ebx
  3b:	74 11                	je     0x4e
  3d:	0f                   	.byte 0xf
  3e:	1f                   	(bad)
  3f:	44                   	rex.R