rcu: INFO: rcu_preempt self-detected stall on CPU
rcu: 	0-....: (10499 ticks this GP) idle=db1/1/0x4000000000000000 softirq=81482/81487 fqs=4692 
	(t=10500 jiffies g=118901 q=1899)
NMI backtrace for cpu 0
CPU: 0 PID: 8409 Comm: syz-executor.0 Not tainted 5.16.0-rc6-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
 <IRQ>
 __dump_stack lib/dump_stack.c:88 [inline]
 dump_stack_lvl+0x1dc/0x2d8 lib/dump_stack.c:106
 nmi_cpu_backtrace+0x45f/0x490 lib/nmi_backtrace.c:111
 nmi_trigger_cpumask_backtrace+0x16a/0x280 lib/nmi_backtrace.c:62
 trigger_single_cpu_backtrace include/linux/nmi.h:164 [inline]
 rcu_dump_cpu_stacks+0x22d/0x390 kernel/rcu/tree_stall.h:343
 print_cpu_stall kernel/rcu/tree_stall.h:627 [inline]
 check_cpu_stall kernel/rcu/tree_stall.h:711 [inline]
 rcu_pending kernel/rcu/tree.c:3878 [inline]
 rcu_sched_clock_irq+0x1e33/0x2bc0 kernel/rcu/tree.c:2597
 update_process_times+0x197/0x200 kernel/time/timer.c:1785
 tick_sched_handle kernel/time/tick-sched.c:226 [inline]
 tick_sched_timer+0x27d/0x420 kernel/time/tick-sched.c:1428
 __run_hrtimer kernel/time/hrtimer.c:1685 [inline]
 __hrtimer_run_queues+0x4cb/0xa60 kernel/time/hrtimer.c:1749
 hrtimer_interrupt+0x3b3/0x1040 kernel/time/hrtimer.c:1811
 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1086 [inline]
 __sysvec_apic_timer_interrupt+0xf9/0x270 arch/x86/kernel/apic/apic.c:1103
 sysvec_apic_timer_interrupt+0x8c/0xb0 arch/x86/kernel/apic/apic.c:1097
 </IRQ>
 <TASK>
 asm_sysvec_apic_timer_interrupt+0x12/0x20
RIP: 0010:__raw_spin_unlock_irq include/linux/spinlock_api_smp.h:160 [inline]
RIP: 0010:_raw_spin_unlock_irq+0x25/0x40 kernel/locking/spinlock.c:202
Code: d1 52 fd ff 90 53 48 89 fb 48 83 c7 18 48 8b 74 24 08 e8 2e f7 4f f7 48 89 df e8 36 a8 51 f7 e8 81 02 75 f7 fb bf 01 00 00 00 <e8> 96 00 44 f7 65 8b 05 b7 49 ec 75 85 c0 74 02 5b c3 e8 3c 31 ea
RSP: 0018:ffffc9000331edb0 EFLAGS: 00000282
RAX: e1f9ea4e32863200 RBX: ffffffff8cc5c4d8 RCX: ffffffff81667321
RDX: dffffc0000000000 RSI: 0000000000000001 RDI: 0000000000000001
RBP: ffffc9000331eff0 R08: dffffc0000000000 R09: fffffbfff1ff41de
R10: fffffbfff1ff41de R11: 0000000000000000 R12: ffffc9000331eec0
R13: dffffc0000000000 R14: ffffffff8cc5c4c0 R15: 0000000000000006
 rwsem_down_write_slowpath+0xcbd/0x1480 kernel/locking/rwsem.c:1127
 __down_write_common kernel/locking/rwsem.c:1268 [inline]
 __down_write kernel/locking/rwsem.c:1277 [inline]
 down_write+0x163/0x170 kernel/locking/rwsem.c:1524
 kernfs_add_one+0x54/0x600 fs/kernfs/dir.c:725
 __kernfs_create_file+0x235/0x2e0 fs/kernfs/file.c:1014
 sysfs_add_file_mode_ns+0x21d/0x330 fs/sysfs/file.c:294
 create_files fs/sysfs/group.c:64 [inline]
 internal_create_group+0x54c/0xed0 fs/sysfs/group.c:148
 loop_sysfs_init drivers/block/loop.c:736 [inline]
 loop_configure+0xfd6/0x1740 drivers/block/loop.c:1051
 lo_ioctl+0x7d4/0x1f40
 blkdev_ioctl+0x3ac/0x790 block/ioctl.c:609
 vfs_ioctl fs/ioctl.c:51 [inline]
 __do_sys_ioctl fs/ioctl.c:874 [inline]
 __se_sys_ioctl+0xfb/0x170 fs/ioctl.c:860
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x44/0xd0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x44/0xae
RIP: 0033:0x7f3425187c57
Code: 3c 1c 48 f7 d8 49 39 c4 72 b8 e8 04 54 02 00 85 c0 78 bd 48 83 c4 08 4c 89 e0 5b 41 5c c3 0f 1f 44 00 00 b8 10 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:00007f3423afcf28 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007f34251d19c8 RCX: 00007f3425187c57
RDX: 000000000000000d RSI: 0000000000004c00 RDI: 000000000000000f
RBP: 000000000000000f R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 000000000000000d
R13: 000000000000000d R14: 00000000200002a8 R15: 0000000000000007
 </TASK>
----------------
Code disassembly (best guess):
   0:	d1 52 fd             	rcll   -0x3(%rdx)
   3:	ff 90 53 48 89 fb    	callq  *-0x476b7ad(%rax)
   9:	48 83 c7 18          	add    $0x18,%rdi
   d:	48 8b 74 24 08       	mov    0x8(%rsp),%rsi
  12:	e8 2e f7 4f f7       	callq  0xf74ff745
  17:	48 89 df             	mov    %rbx,%rdi
  1a:	e8 36 a8 51 f7       	callq  0xf751a855
  1f:	e8 81 02 75 f7       	callq  0xf77502a5
  24:	fb                   	sti
  25:	bf 01 00 00 00       	mov    $0x1,%edi
* 2a:	e8 96 00 44 f7       	callq  0xf74400c5 <-- trapping instruction
  2f:	65 8b 05 b7 49 ec 75 	mov    %gs:0x75ec49b7(%rip),%eax        # 0x75ec49ed
  36:	85 c0                	test   %eax,%eax
  38:	74 02                	je     0x3c
  3a:	5b                   	pop    %rbx
  3b:	c3                   	retq
  3c:	e8                   	.byte 0xe8
  3d:	3c 31                	cmp    $0x31,%al
  3f:	ea                   	(bad)