rcu: INFO: rcu_sched self-detected stall on CPU
rcu: 	1-...!: (10500 ticks this GP) idle=9da/1/0x4000000000000002 softirq=10990/10990 fqs=31 
	(t=10502 jiffies g=13365 q=846)
rcu: rcu_sched kthread starved for 10437 jiffies! g13365 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x0 ->cpu=0
rcu: RCU grace-period kthread stack dump:
rcu_sched       R  running task    29144    10      2 0x80004000
Call Trace:
 context_switch /kernel/sched/core.c:3254 [inline]
 __schedule+0x772/0x1530 /kernel/sched/core.c:3880
 schedule+0xa5/0x260 /kernel/sched/core.c:3944
 schedule_timeout+0x44e/0xbc0 /kernel/time/timer.c:1807
 rcu_gp_fqs_loop /kernel/rcu/tree.c:1611 [inline]
 rcu_gp_kthread+0x835/0x1320 /kernel/rcu/tree.c:1768
 kthread+0x361/0x430 /kernel/kthread.c:255
 ret_from_fork+0x24/0x30 /arch/x86/entry/entry_64.S:352
NMI backtrace for cpu 1
CPU: 1 PID: 8985 Comm: syz-executor.0 Not tainted 5.2.0+ #71
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+0x16f/0x1f0 /lib/dump_stack.c:113
 nmi_cpu_backtrace.cold+0x70/0xb2 /lib/nmi_backtrace.c:101
 nmi_trigger_cpumask_backtrace+0x22d/0x25c /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+0x183/0x1cf /kernel/rcu/tree_stall.h:254
 print_cpu_stall /kernel/rcu/tree_stall.h:455 [inline]
 check_cpu_stall /kernel/rcu/tree_stall.h:529 [inline]
 rcu_pending /kernel/rcu/tree.c:2736 [inline]
 rcu_sched_clock_irq.cold+0x491/0x8c0 /kernel/rcu/tree.c:2183
 update_process_times+0x32/0x80 /kernel/time/timer.c:1639
 tick_sched_handle+0xa2/0x190 /kernel/time/tick-sched.c:167
 tick_sched_timer+0x47/0x130 /kernel/time/tick-sched.c:1296
 __run_hrtimer /kernel/time/hrtimer.c:1389 [inline]
 __hrtimer_run_queues+0x364/0xd90 /kernel/time/hrtimer.c:1451
 hrtimer_interrupt+0x2ea/0x730 /kernel/time/hrtimer.c:1509
 local_apic_timer_interrupt /arch/x86/kernel/apic/apic.c:1068 [inline]
 smp_apic_timer_interrupt+0x10b/0x550 /arch/x86/kernel/apic/apic.c:1093
 apic_timer_interrupt+0xf/0x20 /arch/x86/entry/entry_64.S:828
 </IRQ>
RIP: 0010:__read_once_size /./include/linux/compiler.h:199 [inline]
RIP: 0010:check_kcov_mode /kernel/kcov.c:70 [inline]
RIP: 0010:write_comp_data+0x17/0x70 /kernel/kcov.c:123
Code: c2 01 48 39 d0 76 07 48 89 34 d1 48 89 11 5d c3 0f 1f 00 65 4c 8b 04 25 c0 fd 01 00 65 8b 05 a8 a6 90 7e a9 00 01 1f 00 75 51 <41> 8b 80 a8 12 00 00 83 f8 03 75 45 49 8b 80 b0 12 00 00 45 8b 80
RSP: 0018:ffff88805f36f578 EFLAGS: 00000246 ORIG_RAX: ffffffffffffff13
RAX: 0000000000000000 RBX: 0000000000000003 RCX: ffffffff831381ad
RDX: 0000000000000003 RSI: 0000000000000000 RDI: 0000000000000005
RBP: ffff88805f36f580 R08: ffff88808f530380 R09: 00000000747f4071
R10: 000000003195efde R11: 0000000000000000 R12: ffff88805f36f740
R13: ffff88805f36f710 R14: 1ffff1100be6deb2 R15: ffff88805f36f740
 crypto_aegis128_update+0xbd/0x120 /crypto/aegis128.c:49
 crypto_aegis128_update_a /crypto/aegis128.c:58 [inline]
 crypto_aegis128_init /crypto/aegis128.c:88 [inline]
 crypto_aegis128_crypt+0x286/0xd00 /crypto/aegis128.c:360
 crypto_aegis128_encrypt+0x110/0x1e0 /crypto/aegis128.c:378
 crypto_aead_encrypt+0xaf/0xf0 /crypto/aead.c:98
 _aead_recvmsg /crypto/algif_aead.c:310 [inline]
 aead_recvmsg+0x8d6/0x16a0 /crypto/algif_aead.c:330
 sock_recvmsg_nosec /net/socket.c:871 [inline]
 sock_recvmsg /net/socket.c:889 [inline]
 sock_recvmsg+0xce/0x110 /net/socket.c:885
 ___sys_recvmsg+0x271/0x5a0 /net/socket.c:2480
 do_recvmmsg+0x27e/0x7a0 /net/socket.c:2601
 __sys_recvmmsg+0xe5/0x270 /net/socket.c:2682
 __do_sys_recvmmsg /net/socket.c:2703 [inline]
 __se_sys_recvmmsg /net/socket.c:2696 [inline]
 __x64_sys_recvmmsg+0xe6/0x140 /net/socket.c:2696
 do_syscall_64+0xfd/0x6a0 /arch/x86/entry/common.c:296
 entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x459819
Code: fd b7 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 cb b7 fb ff c3 66 2e 0f 1f 84 00 00 00 00
RSP: 002b:00007f46a7cdec78 EFLAGS: 00000246 ORIG_RAX: 000000000000012b
RAX: ffffffffffffffda RBX: 0000000000000005 RCX: 0000000000459819
RDX: 0000000000000030 RSI: 0000000020007e00 RDI: 0000000000000006
RBP: 000000000075bf20 R08: 0000000020008000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00007f46a7cdf6d4
R13: 00000000004c6bf7 R14: 00000000004dbd88 R15: 00000000ffffffff