rcu: INFO: rcu_preempt self-detected stall on CPU
rcu: 	0-....: (1 GPs behind) idle=095/1/0x4000000000000000 softirq=84934/84935 fqs=4957 
	(t=10500 jiffies g=155677 q=2852)
NMI backtrace for cpu 0
CPU: 0 PID: 8021 Comm: syz-executor.0 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:unwind_next_frame+0xe0c/0x1ce0 arch/x86/kernel/unwind_orc.c:605
Code: 26 0c 00 0f b6 f0 0f 84 c7 2a c1 07 4d 8d 7e 34 e9 ad f5 ff ff 49 8d 56 40 48 b8 00 00 00 00 00 fc ff df 48 89 d1 48 c1 e9 03 <80> 3c 01 00 0f 85 d9 0d 00 00 49 8d 78 02 4d 8b 66 40 48 b9 00 00
RSP: 0018:ffffc900058f75a0 EFLAGS: 00000216
RAX: dffffc0000000000 RBX: 1ffff92000b1eebc RCX: 1ffff92000b1eed7
RDX: ffffc900058f76b8 RSI: 0000000000000001 RDI: ffffc900058f76d0
RBP: 0000000000000001 R08: ffffffff8df93158 R09: 0000000000000001
R10: fffff52000b1eeda R11: 0000000000086089 R12: ffffc900058f7d30
R13: ffffc900058f76ad R14: ffffc900058f7678 R15: ffffffff8df9315c
 arch_stack_walk+0x7d/0xe0 arch/x86/kernel/stacktrace.c:25
 stack_trace_save+0x8c/0xc0 kernel/stacktrace.c:121
 kasan_save_stack+0x1b/0x40 mm/kasan/common.c:38
 kasan_set_track mm/kasan/common.c:46 [inline]
 set_alloc_info mm/kasan/common.c:434 [inline]
 ____kasan_kmalloc mm/kasan/common.c:513 [inline]
 ____kasan_kmalloc mm/kasan/common.c:472 [inline]
 __kasan_kmalloc+0xa4/0xd0 mm/kasan/common.c:522
 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: 0033:0x7fa7cdde7ae9
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:00007fa7cb35d188 EFLAGS: 00000246 ORIG_RAX: 00000000000001aa
RAX: ffffffffffffffda RBX: 00007fa7cdefaf60 RCX: 00007fa7cdde7ae9
RDX: 0000000000000000 RSI: 0000000000006019 RDI: 0000000000000006
RBP: 00007fa7cde41f25 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007ffd929e56bf R14: 00007fa7cb35d300 R15: 0000000000022000
 </TASK>
----------------
Code disassembly (best guess):
   0:	26 0c 00             	es or  $0x0,%al
   3:	0f b6 f0             	movzbl %al,%esi
   6:	0f 84 c7 2a c1 07    	je     0x7c12ad3
   c:	4d 8d 7e 34          	lea    0x34(%r14),%r15
  10:	e9 ad f5 ff ff       	jmpq   0xfffff5c2
  15:	49 8d 56 40          	lea    0x40(%r14),%rdx
  19:	48 b8 00 00 00 00 00 	movabs $0xdffffc0000000000,%rax
  20:	fc ff df
  23:	48 89 d1             	mov    %rdx,%rcx
  26:	48 c1 e9 03          	shr    $0x3,%rcx
* 2a:	80 3c 01 00          	cmpb   $0x0,(%rcx,%rax,1) <-- trapping instruction
  2e:	0f 85 d9 0d 00 00    	jne    0xe0d
  34:	49 8d 78 02          	lea    0x2(%r8),%rdi
  38:	4d 8b 66 40          	mov    0x40(%r14),%r12
  3c:	48                   	rex.W
  3d:	b9                   	.byte 0xb9