rcu: INFO: rcu_preempt self-detected stall on CPU
rcu: 	0-....: (10500 ticks this GP) idle=b81/1/0x4000000000000000 softirq=220731/220731 fqs=5028 
	(t=10502 jiffies g=357465 q=6936)
NMI backtrace for cpu 0
CPU: 0 PID: 21740 Comm: syz-executor.4 Not tainted 5.15.0-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+0xcd/0x134 lib/dump_stack.c:106
 nmi_cpu_backtrace.cold+0x47/0x144 lib/nmi_backtrace.c:105
 nmi_trigger_cpumask_backtrace+0x1ae/0x220 lib/nmi_backtrace.c:62
 trigger_single_cpu_backtrace include/linux/nmi.h:164 [inline]
 rcu_dump_cpu_stacks+0x25e/0x3f0 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.cold+0x9d/0x746 kernel/rcu/tree.c:2597
 update_process_times+0x16d/0x200 kernel/time/timer.c:1785
 tick_sched_handle+0x9b/0x180 kernel/time/tick-sched.c:226
 tick_sched_timer+0x1b0/0x2d0 kernel/time/tick-sched.c:1421
 __run_hrtimer kernel/time/hrtimer.c:1685 [inline]
 __hrtimer_run_queues+0x1c0/0xe50 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:lock_acquire+0x1ef/0x510 kernel/locking/lockdep.c:5593
Code: 97 a5 7e 83 f8 01 0f 85 b4 02 00 00 9c 58 f6 c4 02 0f 85 9f 02 00 00 48 83 7c 24 08 00 74 01 fb 48 b8 00 00 00 00 00 fc ff df <48> 01 c3 48 c7 03 00 00 00 00 48 c7 43 08 00 00 00 00 48 8b 84 24
RSP: 0018:ffffc90018ad7880 EFLAGS: 00000206
RAX: dffffc0000000000 RBX: 1ffff9200315af12 RCX: ffffffff815c902f
RDX: 1ffff1100efc888b RSI: 0000000000000000 RDI: 0000000000000000
RBP: 0000000000000001 R08: 0000000000000000 R09: ffffffff8fd3ea17
R10: fffffbfff1fa7d42 R11: 0000000000000000 R12: 0000000000000000
R13: 0000000000000000 R14: ffffffff8bac5b80 R15: 0000000000000000
 fs_reclaim_acquire mm/page_alloc.c:4558 [inline]
 fs_reclaim_acquire+0xd2/0x160 mm/page_alloc.c:4549
 might_alloc include/linux/sched/mm.h:227 [inline]
 slab_pre_alloc_hook mm/slab.h:492 [inline]
 slab_alloc_node mm/slub.c:3127 [inline]
 slab_alloc mm/slub.c:3221 [inline]
 kmem_cache_alloc_trace+0x3b/0x2b0 mm/slub.c:3238
 kmalloc include/linux/slab.h:591 [inline]
 io_add_buffers fs/io_uring.c:4405 [inline]
 io_provide_buffers fs/io_uring.c:4439 [inline]
 io_issue_sqe+0x2887/0x7010 fs/io_uring.c:6705
 __io_queue_sqe fs/io_uring.c:6978 [inline]
 io_queue_sqe fs/io_uring.c:7020 [inline]
 io_submit_sqe fs/io_uring.c:7223 [inline]
 io_submit_sqes+0x1bca/0x8a20 fs/io_uring.c:7329
 __do_sys_io_uring_enter+0xf6e/0x1f50 fs/io_uring.c:10043
 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: 0033:0x7f6dc9d35ae9
Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 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:00007f6dc72ab188 EFLAGS: 00000246 ORIG_RAX: 00000000000001aa
RAX: ffffffffffffffda RBX: 00007f6dc9e48f60 RCX: 00007f6dc9d35ae9
RDX: 0000000000000000 RSI: 00000000000002ff RDI: 0000000000000006
RBP: 00007f6dc9d8ff25 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f6dca37cb2f R14: 00007f6dc72ab300 R15: 0000000000022000
 </TASK>
----------------
Code disassembly (best guess):
   0:	97                   	xchg   %eax,%edi
   1:	a5                   	movsl  %ds:(%rsi),%es:(%rdi)
   2:	7e 83                	jle    0xffffff87
   4:	f8                   	clc
   5:	01 0f                	add    %ecx,(%rdi)
   7:	85 b4 02 00 00 9c 58 	test   %esi,0x589c0000(%rdx,%rax,1)
   e:	f6 c4 02             	test   $0x2,%ah
  11:	0f 85 9f 02 00 00    	jne    0x2b6
  17:	48 83 7c 24 08 00    	cmpq   $0x0,0x8(%rsp)
  1d:	74 01                	je     0x20
  1f:	fb                   	sti
  20:	48 b8 00 00 00 00 00 	movabs $0xdffffc0000000000,%rax
  27:	fc ff df
* 2a:	48 01 c3             	add    %rax,%rbx <-- trapping instruction
  2d:	48 c7 03 00 00 00 00 	movq   $0x0,(%rbx)
  34:	48 c7 43 08 00 00 00 	movq   $0x0,0x8(%rbx)
  3b:	00
  3c:	48                   	rex.W
  3d:	8b                   	.byte 0x8b
  3e:	84                   	.byte 0x84
  3f:	24                   	.byte 0x24