rcu: INFO: rcu_preempt self-detected stall on CPU
rcu: 	0-...!: (10500 ticks this GP) idle=591/1/0x4000000000000000 softirq=162268/162268 fqs=33 
	(t=10502 jiffies g=255757 q=371)
rcu: rcu_preempt kthread starved for 10436 jiffies! g255757 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x0 ->cpu=1
rcu: 	Unless rcu_preempt kthread gets sufficient CPU time, OOM is now expected behavior.
rcu: RCU grace-period kthread stack dump:
task:rcu_preempt     state:R  running task     stack:26544 pid:   14 ppid:     2 flags:0x00004000
Call Trace:
 context_switch kernel/sched/core.c:4940 [inline]
 __schedule+0xb72/0x1460 kernel/sched/core.c:6287
 schedule+0x14b/0x210 kernel/sched/core.c:6366
 schedule_timeout+0x1b9/0x300 kernel/time/timer.c:1881
 rcu_gp_fqs_loop+0x1fd/0x770 kernel/rcu/tree.c:1957
 rcu_gp_kthread+0xa5/0x350 kernel/rcu/tree.c:2130
 kthread+0x453/0x480 kernel/kthread.c:319
 ret_from_fork+0x1f/0x30
rcu: Stack dump where RCU GP kthread last ran:
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 PID: 3155 Comm: syz-executor.3 Not tainted 5.15.0-rc5-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:lockdep_enabled kernel/locking/lockdep.c:91 [inline]
RIP: 0010:lock_release+0xd5/0x810 kernel/locking/lockdep.c:5638
Code: 9c 7e 85 c0 0f 85 d4 04 00 00 65 48 8b 04 25 c0 ef 01 00 48 89 44 24 10 48 8d 98 1c 0a 00 00 48 89 d8 48 c1 e8 03 42 8a 04 20 <84> c0 0f 85 55 05 00 00 83 3b 00 0f 85 a3 04 00 00 4c 89 74 24 58
RSP: 0018:ffffc90000dc08a0 EFLAGS: 00000807
RAX: 1ffff11029309800 RBX: ffff88814984c31c RCX: 0000000000010104
RDX: 0000000000000000 RSI: 0000000000010104 RDI: 0000000000000000
RBP: ffffc90000dc09d0 R08: dffffc0000000000 R09: ffffed10173a64a2
R10: ffffed10173a64a2 R11: 0000000000000000 R12: dffffc0000000000
R13: 1ffff920001b8120 R14: ffffffff81729930 R15: 0000000000000046
FS:  00007fc1fc0f9700(0000) GS:ffff8880b9d00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007ffffc778690 CR3: 0000000156463000 CR4: 00000000003506e0
Call Trace:
 <IRQ>
 __raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:158 [inline]
 _raw_spin_unlock_irqrestore+0x75/0x130 kernel/locking/spinlock.c:194
 hrtimer_interrupt+0xba0/0x1040 kernel/time/hrtimer.c:1821
 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+0x3e/0xb0 arch/x86/kernel/apic/apic.c:1097
 asm_sysvec_apic_timer_interrupt+0x12/0x20
RIP: 0010:__raw_spin_unlock_irq include/linux/spinlock_api_smp.h:169 [inline]
RIP: 0010:_raw_spin_unlock_irq+0x25/0x40 kernel/locking/spinlock.c:202
Code: 81 53 fd ff 90 53 48 89 fb 48 83 c7 18 48 8b 74 24 08 e8 0e 3e 68 f7 48 89 df e8 16 ef 69 f7 e8 41 03 8d f7 fb bf 01 00 00 00 <e8> 96 55 5c f7 65 8b 05 a7 ec 04 76 85 c0 74 02 5b c3 e8 2c 54 03
RSP: 0018:ffffc90000dc0cb0 EFLAGS: 00000282
RAX: 07a252aa4e0a4800 RBX: ffff8880b9d200c0 RCX: ffffffff81659711
RDX: dffffc0000000000 RSI: 0000000000000102 RDI: 0000000000000001
RBP: ffffc90000dc0e10 R08: dffffc0000000000 R09: fffffbfff1fa37e0
R10: fffffbfff1fa37e0 R11: 0000000000000000 R12: ffffffff882913d0
R13: dffffc0000000000 R14: ffff8880b9d20100 R15: ffff888023e89010
 expire_timers kernel/time/timer.c:1465 [inline]
 __run_timers+0x70a/0x910 kernel/time/timer.c:1734
 run_timer_softirq+0x63/0xf0 kernel/time/timer.c:1747
 __do_softirq+0x392/0x7a3 kernel/softirq.c:558
 __irq_exit_rcu+0xec/0x170 kernel/softirq.c:636
 irq_exit_rcu+0x5/0x20 kernel/softirq.c:648
 sysvec_apic_timer_interrupt+0x91/0xb0 arch/x86/kernel/apic/apic.c:1097
 </IRQ>
 asm_sysvec_apic_timer_interrupt+0x12/0x20
RIP: 0010:finish_lock_switch+0x1c5/0x350 kernel/sched/core.c:4695
Code: be ff ff ff ff e8 bb c6 9e 08 85 c0 74 37 4d 85 e4 75 58 0f 1f 44 00 00 4c 89 ff e8 25 6f a1 08 e8 f0 73 2e 00 fb 48 83 c4 10 <5b> 41 5c 41 5d 41 5e 41 5f 5d c3 0f 0b 4d 85 e4 0f 85 4a ff ff ff
RSP: 0018:ffffc9002045f808 EFLAGS: 00000282
RAX: 07a252aa4e0a4800 RBX: 1ffff110173a6400 RCX: ffffffff81659711
RDX: dffffc0000000000 RSI: 0000000000000001 RDI: 0000000000000000
RBP: ffff8880b9d32000 R08: dffffc0000000000 R09: fffffbfff1fa37e0
R10: fffffbfff1fa37e0 R11: 0000000000000000 R12: 0000000000000000
R13: ffff8880b9d32298 R14: dffffc0000000000 R15: ffff8880b9d31540
 finish_task_switch+0x140/0x630 kernel/sched/core.c:4812
 context_switch kernel/sched/core.c:4943 [inline]
 __schedule+0xb7a/0x1460 kernel/sched/core.c:6287
 preempt_schedule_irq+0xf7/0x1c0 kernel/sched/core.c:6687
 irqentry_exit+0x56/0x90 kernel/entry/common.c:425
 asm_sysvec_apic_timer_interrupt+0x12/0x20
RIP: 0010:perf_trace_init+0xac/0x2f0 kernel/trace/trace_event_perf.c:225
Code: 00 00 49 c7 c6 60 ab 96 8c 0f 1f 44 00 00 48 8d 6b 40 48 89 e8 48 c1 e8 03 42 0f b6 04 28 84 c0 0f 85 30 01 00 00 48 63 6d 00 <4c> 89 ff 48 89 ee e8 b9 e8 f7 ff 49 39 ef 0f 85 b0 00 00 00 48 8d
RSP: 0018:ffffc9002045fb48 EFLAGS: 00000246
RAX: 0000000000000000 RBX: ffffffff8cba34a0 RCX: 0000000000040000
RDX: ffffc900101f3000 RSI: 0000000000001e0a RDI: 0000000000001e0b
RBP: 00000000000003b4 R08: ffffffff818ba327 R09: fffff5200408bf29
R10: fffff5200408bf29 R11: 0000000000000000 R12: ffffffff8c9a44e0
R13: dffffc0000000000 R14: ffffffff8c96ab60 R15: 0000000000000142
 perf_tp_event_init+0x88/0x110 kernel/events/core.c:9761
 perf_try_init_event+0x13e/0x3d0 kernel/events/core.c:11219
 perf_init_event kernel/events/core.c:11283 [inline]
 perf_event_alloc+0x1155/0x2c10 kernel/events/core.c:11574
 __do_sys_perf_event_open kernel/events/core.c:12095 [inline]
 __se_sys_perf_event_open+0x7b2/0x4280 kernel/events/core.c:11987
 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: 0033:0x7fc1feba4a39
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:00007fc1fc0f9188 EFLAGS: 00000246 ORIG_RAX: 000000000000012a
RAX: ffffffffffffffda RBX: 00007fc1feca8020 RCX: 00007fc1feba4a39
RDX: ffffffffffffffff RSI: 0000000000000000 RDI: 0000000020000040
RBP: 00007fc1febfec5f R08: 0000000000000000 R09: 0000000000000000
R10: ffffffffffffffff R11: 0000000000000246 R12: 0000000000000000
R13: 00007ffcf444e6af R14: 00007fc1fc0f9300 R15: 0000000000022000
NMI backtrace for cpu 0
CPU: 0 PID: 3132 Comm: syz-executor.3 Not tainted 5.15.0-rc5-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:105
 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:3880 [inline]
 rcu_sched_clock_irq+0x1e33/0x2bc0 kernel/rcu/tree.c:2599
 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:1421
 __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+0x3e/0xb0 arch/x86/kernel/apic/apic.c:1097
 asm_sysvec_apic_timer_interrupt+0x12/0x20
RIP: 0010:__mod_timer+0xff/0xd20 kernel/time/timer.c:967
Code: 80 3c 28 00 74 08 48 89 df e8 6d 34 5d 00 48 c7 84 24 c0 00 00 00 00 00 00 00 49 8d 5f 18 48 89 d8 48 c1 e8 03 42 80 3c 28 00 <74> 08 48 89 df e8 c7 33 5d 00 48 83 3b 00 0f 84 fe 0b 00 00 44 89
RSP: 0018:ffffc90000007a80 EFLAGS: 00000246
RAX: 1ffff11028e7b205 RBX: ffff8881473d9028 RCX: ffff888075bb3900
RDX: 0000000000000100 RSI: 000000010001d957 RDI: ffff8881473d9010
RBP: ffffc90000007bb0 R08: ffffffff840edf97 R09: ffffed10173864a2
R10: ffffed10173864a2 R11: 0000000000000000 R12: 0000000000000000
R13: dffffc0000000000 R14: ffffc90000007b20 R15: ffff8881473d9010
 call_timer_fn+0xf6/0x210 kernel/time/timer.c:1421
 expire_timers kernel/time/timer.c:1466 [inline]
 __run_timers+0x71a/0x910 kernel/time/timer.c:1734
 run_timer_softirq+0x63/0xf0 kernel/time/timer.c:1747
 __do_softirq+0x392/0x7a3 kernel/softirq.c:558
 __irq_exit_rcu+0xec/0x170 kernel/softirq.c:636
 irq_exit_rcu+0x5/0x20 kernel/softirq.c:648
 sysvec_apic_timer_interrupt+0x91/0xb0 arch/x86/kernel/apic/apic.c:1097
 </IRQ>
 asm_sysvec_apic_timer_interrupt+0x12/0x20
RIP: 0010:lock_acquire+0x21f/0x4d0 kernel/locking/lockdep.c:5629
Code: 08 4c 89 f7 e8 32 e5 69 00 f6 84 24 81 00 00 00 02 0f 85 13 02 00 00 41 f7 c4 00 02 00 00 74 01 fb 48 c7 44 24 40 0e 36 e0 45 <4b> c7 04 2f 00 00 00 00 43 c7 44 2f 09 00 00 00 00 43 c7 44 2f 11
RSP: 0018:ffffc9002032f920 EFLAGS: 00000206
RAX: 0000000000000001 RBX: 1ffff92004065f34 RCX: ffff888075bb4318
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: ffffc9002032fa70 R08: dffffc0000000000 R09: fffffbfff1fa37db
R10: fffffbfff1fa37db R11: 0000000000000000 R12: 0000000000000246
R13: 1ffff92004065f2c R14: ffffc9002032f9a0 R15: dffffc0000000000
 __fs_reclaim_acquire mm/page_alloc.c:4539 [inline]
 fs_reclaim_acquire+0x77/0x110 mm/page_alloc.c:4553
 might_alloc include/linux/sched/mm.h:198 [inline]
 slab_pre_alloc_hook mm/slab.h:492 [inline]
 slab_alloc_node mm/slub.c:3120 [inline]
 slab_alloc mm/slub.c:3214 [inline]
 kmem_cache_alloc+0x43/0x300 mm/slub.c:3219
 kmem_cache_zalloc include/linux/slab.h:711 [inline]
 __alloc_file+0x26/0x2f0 fs/file_table.c:101
 alloc_empty_file+0xa9/0x1b0 fs/file_table.c:150
 alloc_file+0x58/0x4f0 fs/file_table.c:192
 alloc_file_pseudo+0x272/0x300 fs/file_table.c:232
 __anon_inode_getfile fs/anon_inodes.c:109 [inline]
 anon_inode_getfile+0xc4/0x180 fs/anon_inodes.c:147
 __do_sys_perf_event_open kernel/events/core.c:12210 [inline]
 __se_sys_perf_event_open+0x1137/0x4280 kernel/events/core.c:11987
 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: 0033:0x7fc1feba4a39
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:00007fc1fc11a188 EFLAGS: 00000246 ORIG_RAX: 000000000000012a
RAX: ffffffffffffffda RBX: 00007fc1feca7f60 RCX: 00007fc1feba4a39
RDX: ffffffffffffffff RSI: 0000000000000000 RDI: 0000000020000040
RBP: 00007fc1febfec5f R08: 0000000000000000 R09: 0000000000000000
R10: ffffffffffffffff R11: 0000000000000246 R12: 0000000000000000
R13: 00007ffcf444e6af R14: 00007fc1fc11a300 R15: 0000000000022000
----------------
Code disassembly (best guess), 2 bytes skipped:
   0:	85 c0                	test   %eax,%eax
   2:	0f 85 d4 04 00 00    	jne    0x4dc
   8:	65 48 8b 04 25 c0 ef 	mov    %gs:0x1efc0,%rax
   f:	01 00
  11:	48 89 44 24 10       	mov    %rax,0x10(%rsp)
  16:	48 8d 98 1c 0a 00 00 	lea    0xa1c(%rax),%rbx
  1d:	48 89 d8             	mov    %rbx,%rax
  20:	48 c1 e8 03          	shr    $0x3,%rax
  24:	42 8a 04 20          	mov    (%rax,%r12,1),%al
* 28:	84 c0                	test   %al,%al <-- trapping instruction
  2a:	0f 85 55 05 00 00    	jne    0x585
  30:	83 3b 00             	cmpl   $0x0,(%rbx)
  33:	0f 85 a3 04 00 00    	jne    0x4dc
  39:	4c 89 74 24 58       	mov    %r14,0x58(%rsp)