rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: 	1-...!: (1 ticks this GP) idle=d5b/1/0x4000000000000000 softirq=57808/57808 fqs=2 
	(detected by 0, t=10502 jiffies, g=90769, q=27)
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 PID: 27631 Comm: syz-executor.5 Not tainted 5.15.0-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:check_preemption_disabled+0x67/0x1c0 lib/smp_processor_id.c:55
Code: 31 ff 0f 1f 44 00 00 81 e5 ff ff ff 7f 74 2a 0f 1f 44 00 00 65 48 8b 04 25 28 00 00 00 48 3b 44 24 08 0f 85 52 01 00 00 89 d8 <48> 83 c4 10 5b 41 5c 41 5d 41 5e 41 5f 5d c3 48 c7 04 24 00 00 00
RSP: 0018:ffffc90000dc09b0 EFLAGS: 00000046
RAX: 0000000000000001 RBX: 0000000000000001 RCX: 0000000080010002
RDX: 0000000000000000 RSI: 0000000000010002 RDI: 0000000000000000
RBP: 0000000000010002 R08: dffffc0000000000 R09: fffffbfff1bb8fc6
R10: fffffbfff1bb8fc6 R11: 0000000000000000 R12: 0000000000000046
R13: ffff8880302cba00 R14: ffffffff8a4f0980 R15: ffffffff8ab478e0
FS:  00007fe0ae99b700(0000) GS:ffff8880b9b00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b30521000 CR3: 000000002f94d000 CR4: 00000000003526e0
Call Trace:
 <IRQ>
 lockdep_recursion_inc kernel/locking/lockdep.c:433 [inline]
 lock_is_held_type+0x77/0x190 kernel/locking/lockdep.c:5667
 lock_is_held include/linux/lockdep.h:283 [inline]
 rcu_read_lock_sched_held+0x89/0x130 kernel/rcu/update.c:125
 trace_lock_acquire+0x59/0x190 include/trace/events/lock.h:13
 lock_acquire+0xa5/0x4d0 kernel/locking/lockdep.c:5596
 __raw_spin_lock_irq include/linux/spinlock_api_smp.h:119 [inline]
 _raw_spin_lock_irq+0xcf/0x110 kernel/locking/spinlock.c:170
 __run_hrtimer kernel/time/hrtimer.c:1689 [inline]
 __hrtimer_run_queues+0x546/0xa60 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+0x8c/0xb0 arch/x86/kernel/apic/apic.c:1097
 </IRQ>
 asm_sysvec_apic_timer_interrupt+0x12/0x20
RIP: 0010:kasan_check_range+0x2/0x2f0 mm/kasan/generic.c:188
Code: 48 89 c7 e8 e0 90 2c 08 31 c0 c3 0f 0b b8 ea ff ff ff c3 0f 0b b8 ea ff ff ff c3 cc cc cc cc cc cc cc cc cc cc cc cc cc 41 57 <41> 56 41 55 41 54 53 b0 01 48 85 f6 0f 84 0d 02 00 00 48 89 fb 48
RSP: 0018:ffffc900048b79d0 EFLAGS: 00000246
RAX: 0000000000000002 RBX: 0000000000000038 RCX: ffffffff88026045
RDX: 0000000000000001 RSI: 0000000000000038 RDI: ffffc900048b7b40
RBP: ffffc900048b7b40 R08: ffffffff88026020 R09: ffffc900048b7c60
R10: fffff52000916f9c R11: 0000000000000000 R12: 1ffff92000916f84
R13: 0000000000000000 R14: 0000000000000000 R15: dffffc0000000000
 memset+0x1f/0x40 mm/kasan/shadow.c:44
 __copy_msghdr_from_user net/socket.c:2288 [inline]
 copy_msghdr_from_user net/socket.c:2342 [inline]
 recvmsg_copy_msghdr net/socket.c:2594 [inline]
 ___sys_recvmsg net/socket.c:2666 [inline]
 do_recvmmsg+0x555/0x1680 net/socket.c:2764
 __sys_recvmmsg net/socket.c:2845 [inline]
 __do_sys_recvmmsg net/socket.c:2866 [inline]
 __se_sys_recvmmsg net/socket.c:2859 [inline]
 __x64_sys_recvmmsg+0x1b4/0x240 net/socket.c:2859
 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: 0033:0x7fe0b1425ae9
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:00007fe0ae99b188 EFLAGS: 00000246 ORIG_RAX: 000000000000012b
RAX: ffffffffffffffda RBX: 00007fe0b1538f60 RCX: 00007fe0b1425ae9
RDX: 04000000000003b4 RSI: 00000000200037c0 RDI: 0000000000000003
RBP: 00007fe0b147ff25 R08: 0000000020003700 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007ffd194e468f R14: 00007fe0ae99b300 R15: 0000000000022000
rcu: rcu_preempt kthread starved for 10498 jiffies! g90769 f0x0 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:26576 pid:   14 ppid:     2 flags:0x00004000
Call Trace:
 context_switch kernel/sched/core.c:4969 [inline]
 __schedule+0xb72/0x1460 kernel/sched/core.c:6250
 schedule+0x12b/0x1f0 kernel/sched/core.c:6323
 schedule_timeout+0x1b9/0x300 kernel/time/timer.c:1881
 rcu_gp_fqs_loop+0x1fd/0x770 kernel/rcu/tree.c:1955
 rcu_gp_kthread+0xa5/0x350 kernel/rcu/tree.c:2128
 kthread+0x468/0x490 kernel/kthread.c:327
 ret_from_fork+0x1f/0x30
rcu: Stack dump where RCU GP kthread last ran:
NMI backtrace for cpu 0
CPU: 0 PID: 24074 Comm: kworker/u4:12 Not tainted 5.15.0-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Workqueue: events_unbound toggle_allocation_gate
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_check_gp_kthread_starvation+0x1ff/0x270 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+0x23d5/0x2bc0 kernel/rcu/tree.c:2597
 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+0x8c/0xb0 arch/x86/kernel/apic/apic.c:1097
 </IRQ>
 asm_sysvec_apic_timer_interrupt+0x12/0x20
RIP: 0010:csd_lock_wait kernel/smp.c:440 [inline]
RIP: 0010:smp_call_function_many_cond+0xbb2/0xda0 kernel/smp.c:969
Code: 83 e6 01 31 ff e8 1e b3 0b 00 41 83 e7 01 49 bf 00 00 00 00 00 fc ff df 75 0e e8 f9 ae 0b 00 eb 4c 0f 1f 80 00 00 00 00 f3 90 <42> 0f b6 04 3b 84 c0 75 11 41 f7 45 00 01 00 00 00 74 2b e8 d6 ae
RSP: 0018:ffffc9000cbef820 EFLAGS: 00000293
RAX: ffffffff81784c0a RBX: 1ffff11017366e4d RCX: ffff88803f63ba00
RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000000
RBP: ffffc9000cbef960 R08: ffffffff81784bd2 R09: ffffffff843762f0
R10: 0000000000000009 R11: ffff88803f63ba00 R12: 0000000000000001
R13: ffff8880b9b37268 R14: ffff8880b9a325c0 R15: dffffc0000000000
 on_each_cpu_cond_mask+0x3b/0x80 kernel/smp.c:1135
 on_each_cpu include/linux/smp.h:71 [inline]
 text_poke_sync arch/x86/kernel/alternative.c:1112 [inline]
 text_poke_bp_batch+0x310/0x940 arch/x86/kernel/alternative.c:1297
 text_poke_flush arch/x86/kernel/alternative.c:1451 [inline]
 text_poke_finish+0x16/0x30 arch/x86/kernel/alternative.c:1458
 arch_jump_label_transform_apply+0x13/0x20 arch/x86/kernel/jump_label.c:146
 static_key_enable_cpuslocked+0x12d/0x250 kernel/jump_label.c:177
 static_key_enable+0x16/0x20 kernel/jump_label.c:190
 toggle_allocation_gate+0xbf/0x460 mm/kfence/core.c:626
 process_one_work+0x853/0x1140 kernel/workqueue.c:2297
 worker_thread+0xac1/0x1320 kernel/workqueue.c:2444
 kthread+0x468/0x490 kernel/kthread.c:327
 ret_from_fork+0x1f/0x30
----------------
Code disassembly (best guess):
   0:	31 ff                	xor    %edi,%edi
   2:	0f 1f 44 00 00       	nopl   0x0(%rax,%rax,1)
   7:	81 e5 ff ff ff 7f    	and    $0x7fffffff,%ebp
   d:	74 2a                	je     0x39
   f:	0f 1f 44 00 00       	nopl   0x0(%rax,%rax,1)
  14:	65 48 8b 04 25 28 00 	mov    %gs:0x28,%rax
  1b:	00 00
  1d:	48 3b 44 24 08       	cmp    0x8(%rsp),%rax
  22:	0f 85 52 01 00 00    	jne    0x17a
  28:	89 d8                	mov    %ebx,%eax
* 2a:	48 83 c4 10          	add    $0x10,%rsp <-- trapping instruction
  2e:	5b                   	pop    %rbx
  2f:	41 5c                	pop    %r12
  31:	41 5d                	pop    %r13
  33:	41 5e                	pop    %r14
  35:	41 5f                	pop    %r15
  37:	5d                   	pop    %rbp
  38:	c3                   	retq
  39:	48                   	rex.W
  3a:	c7                   	.byte 0xc7
  3b:	04 24                	add    $0x24,%al
  3d:	00 00                	add    %al,(%rax)