audit: type=1804 audit(1546211728.416:96): pid=19538 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=invalid_pcr cause=open_writers comm="syz-executor3" name="/root/syzkaller-testdir919467418/syzkaller.QBMbUJ/366/memory.events" dev="sda1" ino=17091 res=1
rcu: INFO: rcu_preempt self-detected stall on CPU
rcu: 	0-...!: (10501 ticks this GP) idle=2e2/1/0x4000000000000002 softirq=38887/38887 fqs=0 
rcu: 	 (t=10502 jiffies g=52909 q=2454)
rcu: rcu_preempt kthread starved for 10503 jiffies! g52909 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x402 ->cpu=0
rcu: RCU grace-period kthread stack dump:
rcu_preempt     I22032    10      2 0x80000000
Call Trace:
 context_switch kernel/sched/core.c:2831 [inline]
 __schedule+0x86c/0x1ed0 kernel/sched/core.c:3472
 schedule+0xfe/0x460 kernel/sched/core.c:3516
 schedule_timeout+0x140/0x260 kernel/time/timer.c:1803
 rcu_gp_fqs_loop+0x762/0xa80 kernel/rcu/tree.c:1948
 rcu_gp_kthread+0x341/0xc70 kernel/rcu/tree.c:2105
 kthread+0x35a/0x440 kernel/kthread.c:246
 ret_from_fork+0x3a/0x50 arch/x86/entry/entry_64.S:352
NMI backtrace for cpu 0
CPU: 0 PID: 3456 Comm: kworker/0:2 Not tainted 4.20.0+ #254
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Workqueue: events xfrm_hash_rebuild
Call Trace:
 <IRQ>
 __dump_stack lib/dump_stack.c:77 [inline]
 dump_stack+0x1d3/0x2c6 lib/dump_stack.c:113
 nmi_cpu_backtrace.cold.4+0x63/0xa2 lib/nmi_backtrace.c:101
 nmi_trigger_cpumask_backtrace+0x1c2/0x22c lib/nmi_backtrace.c:62
 arch_trigger_cpumask_backtrace+0x14/0x20 arch/x86/kernel/apic/hw_nmi.c:38
 trigger_single_cpu_backtrace include/linux/nmi.h:164 [inline]
 rcu_dump_cpu_stacks+0x16f/0x1bc kernel/rcu/tree.c:1211
 print_cpu_stall.cold.68+0x218/0x40a kernel/rcu/tree.c:1348
 check_cpu_stall kernel/rcu/tree.c:1422 [inline]
 rcu_pending kernel/rcu/tree.c:3018 [inline]
 rcu_check_callbacks+0xac1/0x1410 kernel/rcu/tree.c:2521
 update_process_times+0x2d/0x70 kernel/time/timer.c:1635
 tick_sched_handle+0x9f/0x180 kernel/time/tick-sched.c:161
 tick_sched_timer+0x45/0x130 kernel/time/tick-sched.c:1271
 __run_hrtimer kernel/time/hrtimer.c:1389 [inline]
 __hrtimer_run_queues+0x41c/0x10d0 kernel/time/hrtimer.c:1451
 hrtimer_interrupt+0x313/0x780 kernel/time/hrtimer.c:1509
 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1035 [inline]
 smp_apic_timer_interrupt+0x1a1/0x760 arch/x86/kernel/apic/apic.c:1060
 apic_timer_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:807
 </IRQ>
RIP: 0010:write_comp_data+0x1/0x70 kernel/kcov.c:116
Code: ff e8 43 93 43 00 e9 a4 fc ff ff 4c 89 f7 e8 96 92 43 00 e9 6d fc ff ff e8 ec 8f c9 ff 90 90 90 90 90 90 90 90 90 90 90 90 55 <48> 89 e5 65 4c 8b 04 25 40 ee 01 00 65 8b 05 3c 48 80 7e a9 00 01
RSP: 0018:ffff88809b657320 EFLAGS: 00000282 ORIG_RAX: ffffffffffffff13
RAX: ffff88809b630180 RBX: 0000000000000009 RCX: ffffffff86c3e98b
RDX: 0000000000000009 RSI: 000000000000000e RDI: 0000000000000005
RBP: ffff88809b657330 R08: ffff88809b630180 R09: 0000000000000008
R10: 0000000000000005 R11: ffff88809b630180 R12: dffffc0000000000
R13: ffff8880a41920ec R14: ffff88809a58256c R15: 0000000000000000
 selector_cmp net/xfrm/xfrm_policy.c:1390 [inline]
 xfrm_policy_insert_list+0x62b/0x1020 net/xfrm/xfrm_policy.c:1534
 xfrm_policy_inexact_insert+0x166/0xee0 net/xfrm/xfrm_policy.c:1195
 xfrm_hash_rebuild+0xfc1/0x1380 net/xfrm/xfrm_policy.c:1317
 process_one_work+0xc90/0x1c40 kernel/workqueue.c:2153
 worker_thread+0x17f/0x1390 kernel/workqueue.c:2296
 kthread+0x35a/0x440 kernel/kthread.c:246
 ret_from_fork+0x3a/0x50 arch/x86/entry/entry_64.S:352
rcu: INFO: rcu_preempt detected expedited stalls on CPUs/tasks: { 0-... } 10804 jiffies s: 6593 root: 0x1/.
rcu: blocking rcu_node structures:
Task dump for CPU 0:
kworker/0:2     R  running task    17800  3456      2 0x80000008
Workqueue: events xfrm_hash_rebuild
Call Trace:
 context_switch kernel/sched/core.c:2834 [inline]
 __schedule+0x874/0x1ed0 kernel/sched/core.c:3472
 spin_lock_irq include/linux/spinlock.h:354 [inline]
 worker_thread+0x3e0/0x1390 kernel/workqueue.c:2246