rcu: INFO: rcu_preempt self-detected stall on CPU
rcu: 	0-...!: (1 GPs behind) idle=ef3/1/0x4000000000000000 softirq=47490/47491 fqs=19 
	(t=10500 jiffies g=85337 q=250)
rcu: rcu_preempt kthread timer wakeup didn't happen for 10455 jiffies! g85337 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x402
rcu: 	Possible timer handling issue on cpu=1 timer-softirq=24619
rcu: rcu_preempt kthread starved for 10456 jiffies! g85337 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x402 ->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:I 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:
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 PID: 26262 Comm: syz-executor.3 Not tainted 5.15.0-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:__lock_acquire+0x264/0x54a0 kernel/locking/lockdep.c:4949
Code: fc ff df 48 c1 ea 03 0f b6 14 02 84 d2 74 09 80 fa 03 0f 8e 33 13 00 00 41 0f b7 44 24 20 49 8d 7c 24 08 48 89 fa 48 c1 ea 03 <66> 25 00 e0 09 c8 66 41 89 44 24 20 48 b8 00 00 00 00 00 fc ff df
RSP: 0018:ffffc90002c4f900 EFLAGS: 00000806
RAX: 0000000000000193 RBX: ffffffff8b982da0 RCX: 0000000000000028
RDX: 1ffff1100f59214d RSI: 0000000000000000 RDI: ffff88807ac90a68
RBP: 0000000000000000 R08: 0000000000000001 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000000 R12: ffff88807ac90a60
R13: ffff88807ac90000 R14: 0000000000000002 R15: 0000000000000000
FS:  00007fef3af89700(0000) GS:ffff8880b9d00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000020a00000 CR3: 0000000092083000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 lock_acquire kernel/locking/lockdep.c:5625 [inline]
 lock_acquire+0x1ab/0x510 kernel/locking/lockdep.c:5590
 rcu_lock_acquire include/linux/rcupdate.h:268 [inline]
 rcu_read_lock include/linux/rcupdate.h:688 [inline]
 bpf_map_update_value.isra.0+0x27d/0x910 kernel/bpf/syscall.c:206
 generic_map_update_batch+0x3f2/0x5b0 kernel/bpf/syscall.c:1396
 bpf_map_do_batch+0x3d5/0x510 kernel/bpf/syscall.c:4207
 __sys_bpf+0x2751/0x5f00 kernel/bpf/syscall.c:4682
 __do_sys_bpf kernel/bpf/syscall.c:4722 [inline]
 __se_sys_bpf kernel/bpf/syscall.c:4720 [inline]
 __x64_sys_bpf+0x75/0xb0 kernel/bpf/syscall.c:4720
 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: 0033:0x7fef3da76ae9
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:00007fef3af89188 EFLAGS: 00000246 ORIG_RAX: 0000000000000141
RAX: ffffffffffffffda RBX: 00007fef3db8a1a0 RCX: 00007fef3da76ae9
RDX: 0000000000000038 RSI: 0000000020000300 RDI: 000000000000001a
RBP: 00007fef3dad0f6d R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007ffe4d57f1cf R14: 00007fef3af89300 R15: 0000000000022000
 </TASK>
NMI backtrace for cpu 0
CPU: 0 PID: 26245 Comm: syz-executor.3 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_release+0x3f1/0x720 kernel/locking/lockdep.c:5633
Code: 7e 83 f8 01 0f 85 8d 01 00 00 9c 58 f6 c4 02 0f 85 78 01 00 00 48 f7 04 24 00 02 00 00 74 01 fb 48 b8 00 00 00 00 00 fc ff df <48> 01 c5 48 c7 45 00 00 00 00 00 c7 45 08 00 00 00 00 48 8b 84 24
RSP: 0018:ffffc90003cefa60 EFLAGS: 00000206
RAX: dffffc0000000000 RBX: ffffffffffffffff RCX: ffffc90003cefab0
RDX: 1ffff110040f914a RSI: 0000000000000000 RDI: 0000000000000000
RBP: 1ffff9200079df4e R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000001 R11: 0000000000000000 R12: 0000000000000000
R13: 0000000000000001 R14: ffff8880207c8a58 R15: ffff8880207c8000
 __might_fault mm/memory.c:5273 [inline]
 __might_fault+0x142/0x170 mm/memory.c:5258
 _copy_from_user+0x27/0x180 lib/usercopy.c:13
 copy_from_user include/linux/uaccess.h:192 [inline]
 generic_map_update_batch+0x39f/0x5b0 kernel/bpf/syscall.c:1393
 bpf_map_do_batch+0x3d5/0x510 kernel/bpf/syscall.c:4207
 __sys_bpf+0x2751/0x5f00 kernel/bpf/syscall.c:4682
 __do_sys_bpf kernel/bpf/syscall.c:4722 [inline]
 __se_sys_bpf kernel/bpf/syscall.c:4720 [inline]
 __x64_sys_bpf+0x75/0xb0 kernel/bpf/syscall.c:4720
 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: 0033:0x7fef3da76ae9
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:00007fef3afec188 EFLAGS: 00000246 ORIG_RAX: 0000000000000141
RAX: ffffffffffffffda RBX: 00007fef3db89f60 RCX: 00007fef3da76ae9
RDX: 0000000000000038 RSI: 0000000020000300 RDI: 000000000000001a
RBP: 00007fef3dad0f6d R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007ffe4d57f1cf R14: 00007fef3afec300 R15: 0000000000022000
 </TASK>
----------------
Code disassembly (best guess), 3 bytes skipped:
   0:	48 c1 ea 03          	shr    $0x3,%rdx
   4:	0f b6 14 02          	movzbl (%rdx,%rax,1),%edx
   8:	84 d2                	test   %dl,%dl
   a:	74 09                	je     0x15
   c:	80 fa 03             	cmp    $0x3,%dl
   f:	0f 8e 33 13 00 00    	jle    0x1348
  15:	41 0f b7 44 24 20    	movzwl 0x20(%r12),%eax
  1b:	49 8d 7c 24 08       	lea    0x8(%r12),%rdi
  20:	48 89 fa             	mov    %rdi,%rdx
  23:	48 c1 ea 03          	shr    $0x3,%rdx
* 27:	66 25 00 e0          	and    $0xe000,%ax <-- trapping instruction
  2b:	09 c8                	or     %ecx,%eax
  2d:	66 41 89 44 24 20    	mov    %ax,0x20(%r12)
  33:	48 b8 00 00 00 00 00 	movabs $0xdffffc0000000000,%rax
  3a:	fc ff df