rcu: INFO: rcu_preempt self-detected stall on CPU
rcu: 	1-...!: (1 GPs behind) idle=99a/1/0x4000000000000000 softirq=81954/81958 fqs=13 
	(t=10502 jiffies g=134285 q=121)
rcu: rcu_preempt kthread starved for 10477 jiffies! g134285 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:28896 pid:   10 ppid:     2 flags:0x00004000
Call Trace:
 context_switch kernel/sched/core.c:3778 [inline]
 __schedule+0x979/0xce0 kernel/sched/core.c:4527
NMI backtrace for cpu 1
CPU: 1 PID: 25747 Comm: syz-executor.5 Not tainted 5.9.0-rc1-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:77 [inline]
 dump_stack+0x1f0/0x31e lib/dump_stack.c:118
 nmi_cpu_backtrace+0x9f/0x180 lib/nmi_backtrace.c:101
 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+0x199/0x2a0 kernel/rcu/tree_stall.h:318
 print_cpu_stall kernel/rcu/tree_stall.h:551 [inline]
 check_cpu_stall kernel/rcu/tree_stall.h:625 [inline]
 rcu_pending kernel/rcu/tree.c:3637 [inline]
 rcu_sched_clock_irq+0x1920/0x1eb0 kernel/rcu/tree.c:2519
 update_process_times+0x130/0x1b0 kernel/time/timer.c:1710
 tick_sched_handle kernel/time/tick-sched.c:176 [inline]
 tick_sched_timer+0x25e/0x410 kernel/time/tick-sched.c:1328
 __run_hrtimer kernel/time/hrtimer.c:1524 [inline]
 __hrtimer_run_queues+0x42d/0x930 kernel/time/hrtimer.c:1588
 hrtimer_interrupt+0x373/0xd60 kernel/time/hrtimer.c:1650
 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1080 [inline]
 __sysvec_apic_timer_interrupt+0xf0/0x260 arch/x86/kernel/apic/apic.c:1097
 run_on_irqstack_cond arch/x86/include/asm/irq_stack.h:50 [inline]
 sysvec_apic_timer_interrupt+0xd0/0xf0 arch/x86/kernel/apic/apic.c:1091
 asm_sysvec_apic_timer_interrupt+0x12/0x20 arch/x86/include/asm/idtentry.h:581
RIP: 0010:__raw_spin_unlock_irq include/linux/spinlock_api_smp.h:169 [inline]
RIP: 0010:_raw_spin_unlock_irq+0x57/0x80 kernel/locking/spinlock.c:199
Code: 00 00 00 00 fc ff df 80 3c 08 00 74 0c 48 c7 c7 08 15 4d 89 e8 aa 13 88 f9 48 83 3d 7a 58 20 01 00 74 25 fb 66 0f 1f 44 00 00 <bf> 01 00 00 00 e8 ef 15 24 f9 65 8b 05 64 41 d5 77 85 c0 74 02 5b
RSP: 0018:ffffc90000da8e10 EFLAGS: 00000286
RAX: 1ffffffff129a2a1 RBX: ffff8880ae925400 RCX: dffffc0000000000
RDX: 0000000000000000 RSI: 0000000000000008 RDI: ffffffff882cbc5f
RBP: ffffc90000da8f18 R08: dffffc0000000000 R09: fffffbfff167dab6
R10: fffffbfff167dab6 R11: 0000000000000000 R12: ffff88803bbd2010
R13: dffffc0000000000 R14: ffff8880ae925400 R15: ffffffff868d5ec0
 expire_timers kernel/time/timer.c:1457 [inline]
 __run_timers+0x64e/0x830 kernel/time/timer.c:1755
 run_timer_softirq+0x46/0x80 kernel/time/timer.c:1768
 __do_softirq+0x236/0x66c kernel/softirq.c:298
 asm_call_on_stack+0xf/0x20 arch/x86/entry/entry_64.S:706
 </IRQ>
 __run_on_irqstack arch/x86/include/asm/irq_stack.h:22 [inline]
 run_on_irqstack_cond arch/x86/include/asm/irq_stack.h:48 [inline]
 do_softirq_own_stack+0x91/0xe0 arch/x86/kernel/irq_64.c:77
 invoke_softirq kernel/softirq.c:393 [inline]
 __irq_exit_rcu+0x1e1/0x1f0 kernel/softirq.c:423
 irq_exit_rcu+0x5/0x10 kernel/softirq.c:435
 sysvec_apic_timer_interrupt+0xd5/0xf0 arch/x86/kernel/apic/apic.c:1091
 asm_sysvec_apic_timer_interrupt+0x12/0x20 arch/x86/include/asm/idtentry.h:581
RIP: 0010:__sanitizer_cov_trace_pc+0x42/0x60 kernel/kcov.c:202
Code: ff 00 74 11 f7 c2 00 01 00 00 74 35 83 b9 24 14 00 00 00 74 2c 8b 91 00 14 00 00 83 fa 02 75 21 48 8b 91 08 14 00 00 48 8b 32 <48> 8d 7e 01 8b 89 04 14 00 00 48 39 cf 73 08 48 89 44 f2 08 48 89
RSP: 0018:ffffc90006fefc98 EFLAGS: 00000246
RAX: ffffffff83633465 RBX: ffffffff89654be8 RCX: ffff88800fdd2400
RDX: ffffc9001361f000 RSI: 0000000000000be3 RDI: ffff88803dfb0000
RBP: ffffffff89654bd0 R08: ffffffff866ba536 R09: 0000000000000009
R10: ffffffff88600000 R11: ffffffff8860066c R12: 0000000000000dc0
R13: dffffc0000000000 R14: 0000000000000dc0 R15: 0000000000000026
 smack_sk_alloc_security+0x25/0x260 security/smack/smack_lsm.c:2234
 security_sk_alloc+0x55/0xb0 security/security.c:2180
 sk_prot_alloc+0xd0/0x2b0 net/core/sock.c:1688
 sk_alloc+0x35/0x300 net/core/sock.c:1739
 af_alg_accept+0x97/0x440 crypto/af_alg.c:279
 __sys_accept4_file+0x4cf/0x810 net/socket.c:1753
 __sys_accept4 net/socket.c:1804 [inline]
 __do_sys_accept4 net/socket.c:1816 [inline]
 __se_sys_accept4 net/socket.c:1813 [inline]
 __x64_sys_accept4+0x11c/0x170 net/socket.c:1813
 do_syscall_64+0x31/0x70 arch/x86/entry/common.c:46
 entry_SYSCALL_64_after_hwframe+0x44/0xa9
RIP: 0033:0x45d579
Code: 5d b4 fb ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 90 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 0f 83 2b b4 fb ff c3 66 2e 0f 1f 84 00 00 00 00
RSP: 002b:00007f248b3c5c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000120
RAX: ffffffffffffffda RBX: 0000000000000300 RCX: 000000000045d579
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000004
RBP: 000000000118cf88 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 000000000118cf4c
R13: 00007ffe65ae1d1f R14: 00007f248b3c69c0 R15: 000000000118cf4c