rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
	(detected by 0, t=10502 jiffies, g=381861, q=5)
rcu: All QSes seen, last rcu_preempt kthread activity 10502 (4295208271-4295197769), jiffies_till_next_fqs=1, root ->qsmask 0x0
rcu: rcu_preempt kthread starved for 10502 jiffies! g381861 f0x2 RCU_GP_WAIT_FQS(5) ->state=0x0 ->cpu=0
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:28696 pid:   14 ppid:     2 flags:0x00004000
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:4969 [inline]
 __schedule+0xa9a/0x4940 kernel/sched/core.c:6250
 schedule+0xd2/0x260 kernel/sched/core.c:6323
 schedule_timeout+0x14a/0x2a0 kernel/time/timer.c:1881
 rcu_gp_fqs_loop+0x186/0x810 kernel/rcu/tree.c:1955
 rcu_gp_kthread+0x1de/0x320 kernel/rcu/tree.c:2128
 kthread+0x405/0x4f0 kernel/kthread.c:327
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295
 </TASK>
rcu: Stack dump where RCU GP kthread last ran:
NMI backtrace for cpu 0
CPU: 0 PID: 24539 Comm: kworker/0:4 Not tainted 5.15.0-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Workqueue: events prog_array_map_clear_deferred
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_check_gp_kthread_starvation.cold+0x1fb/0x200 kernel/rcu/tree_stall.h:481
 print_other_cpu_stall kernel/rcu/tree_stall.h:586 [inline]
 check_cpu_stall kernel/rcu/tree_stall.h:729 [inline]
 rcu_pending kernel/rcu/tree.c:3878 [inline]
 rcu_sched_clock_irq+0x2125/0x2200 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:rcu_dynticks_curr_cpu_in_eqs kernel/rcu/tree.c:330 [inline]
RIP: 0010:rcu_is_watching+0x9/0xb0 kernel/rcu/tree.c:1121
Code: 90 48 c7 c7 c0 6b 8d 89 e8 b4 75 d4 07 65 8a 05 59 c1 a0 7e 0f be c0 c3 66 0f 1f 84 00 00 00 00 00 55 53 65 ff 05 c7 86 9f 7e <e8> 72 75 d4 07 48 c7 c3 50 aa 03 00 83 f8 07 89 c5 77 77 48 8d 3c
RSP: 0018:ffffc900034afa50 EFLAGS: 00000202
RAX: 0000000000000001 RBX: 0000000000000000 RCX: ffffffff815c9bb1
RDX: fffffbfff1adea7b RSI: 0000000000000008 RDI: ffffffff8d6f53d0
RBP: 1ffff92000695f51 R08: 0000000000000000 R09: ffffffff8d6f53d7
R10: fffffbfff1adea7a R11: 0000000000000000 R12: 0000000000000001
R13: ffffc90097bd6188 R14: ffff88801d2a3460 R15: 0000000010000009
 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_release include/trace/events/lock.h:58 [inline]
 lock_release+0x522/0x720 kernel/locking/lockdep.c:5636
 __mutex_unlock_slowpath+0x99/0x5e0 kernel/locking/mutex.c:900
 fd_array_map_delete_elem+0x1b0/0x2e0 kernel/bpf/arraymap.c:824
 bpf_fd_array_map_clear kernel/bpf/arraymap.c:871 [inline]
 prog_array_map_clear_deferred+0x10b/0x1b0 kernel/bpf/arraymap.c:1050
 process_one_work+0x9b2/0x1690 kernel/workqueue.c:2297
 worker_thread+0x658/0x11f0 kernel/workqueue.c:2444
 kthread+0x405/0x4f0 kernel/kthread.c:327
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295
 </TASK>
----------------
Code disassembly (best guess):
   0:	90                   	nop
   1:	48 c7 c7 c0 6b 8d 89 	mov    $0xffffffff898d6bc0,%rdi
   8:	e8 b4 75 d4 07       	callq  0x7d475c1
   d:	65 8a 05 59 c1 a0 7e 	mov    %gs:0x7ea0c159(%rip),%al        # 0x7ea0c16d
  14:	0f be c0             	movsbl %al,%eax
  17:	c3                   	retq
  18:	66 0f 1f 84 00 00 00 	nopw   0x0(%rax,%rax,1)
  1f:	00 00
  21:	55                   	push   %rbp
  22:	53                   	push   %rbx
  23:	65 ff 05 c7 86 9f 7e 	incl   %gs:0x7e9f86c7(%rip)        # 0x7e9f86f1
* 2a:	e8 72 75 d4 07       	callq  0x7d475a1 <-- trapping instruction
  2f:	48 c7 c3 50 aa 03 00 	mov    $0x3aa50,%rbx
  36:	83 f8 07             	cmp    $0x7,%eax
  39:	89 c5                	mov    %eax,%ebp
  3b:	77 77                	ja     0xb4
  3d:	48                   	rex.W
  3e:	8d                   	.byte 0x8d
  3f:	3c                   	.byte 0x3c