INFO: rcu_sched self-detected stall on CPU
INFO: rcu_sched detected stalls on CPUs/tasks:
0-...!: (125000 ticks this GP) idle=4ce/140000000000001/0 softirq=73013/73013 fqs=0
(detected by 1, t=125002 jiffies, g=42018, c=42017, q=207)
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 PID: 3174 Comm: syz-executor5 Not tainted 4.15.0-rc7+ #181
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:inb arch/x86/include/asm/io.h:348 [inline]
RIP: 0010:io_serial_in+0x6b/0x90 drivers/tty/serial/8250/8250_port.c:434
RSP: 0018:ffff8801db205680 EFLAGS: 00000002
RAX: dffffc0000000000 RBX: 00000000000003fd RCX: 0000000000000000
RDX: 00000000000003fd RSI: 0000000000000005 RDI: ffffffff88865f18
RBP: ffff8801db205690 R08: 1ffff1003b640a27 R09: 000000000000000c
R10: ffff8801db205600 R11: 0000000000000060 R12: ffffffff88865ee0
R13: 0000000000000020 R14: fffffbfff110cc21 R15: fffffbfff110cbe5
FS: 00007f94cdf89700(0000) GS:ffff8801db200000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000020ef8000 CR3: 00000001c936a006 CR4: 00000000001606f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
serial_in drivers/tty/serial/8250/8250.h:111 [inline]
wait_for_xmitr+0x93/0x1e0 drivers/tty/serial/8250/8250_port.c:2033
serial8250_console_putchar+0x1f/0x60 drivers/tty/serial/8250/8250_port.c:3170
uart_console_write+0xac/0xe0 drivers/tty/serial/serial_core.c:1858
serial8250_console_write+0x64f/0xa40 drivers/tty/serial/8250/8250_port.c:3236
univ8250_console_write+0x5f/0x70 drivers/tty/serial/8250/8250_core.c:590
call_console_drivers kernel/printk/printk.c:1574 [inline]
console_unlock+0x788/0xd80 kernel/printk/printk.c:2233
vprintk_emit+0x4ad/0x590 kernel/printk/printk.c:1757
vprintk_default+0x28/0x30 kernel/printk/printk.c:1796
vprintk_func+0x57/0xc0 kernel/printk/printk_safe.c:379
printk+0xaa/0xca kernel/printk/printk.c:1829
print_cpu_stall_info_begin kernel/rcu/tree_plugin.h:1657 [inline]
print_cpu_stall kernel/rcu/tree.c:1594 [inline]
check_cpu_stall.isra.61+0x845/0x15b0 kernel/rcu/tree.c:1676
__rcu_pending kernel/rcu/tree.c:3440 [inline]
rcu_pending kernel/rcu/tree.c:3502 [inline]
rcu_check_callbacks+0x256/0xd00 kernel/rcu/tree.c:2842
update_process_times+0x30/0x60 kernel/time/timer.c:1628
tick_sched_handle+0x85/0x160 kernel/time/tick-sched.c:162
tick_sched_timer+0x42/0x120 kernel/time/tick-sched.c:1194
__run_hrtimer kernel/time/hrtimer.c:1211 [inline]
__hrtimer_run_queues+0x358/0xe20 kernel/time/hrtimer.c:1275
hrtimer_interrupt+0x1c2/0x5e0 kernel/time/hrtimer.c:1309
local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1025 [inline]
smp_apic_timer_interrupt+0x14a/0x700 arch/x86/kernel/apic/apic.c:1050
apic_timer_interrupt+0xa9/0xb0 arch/x86/entry/entry_64.S:920
RIP: 0010:check_kcov_mode kernel/kcov.c:67 [inline]
RIP: 0010:__sanitizer_cov_trace_pc+0x1a/0x50 kernel/kcov.c:101
RSP: 0018:ffff8801db206738 EFLAGS: 00000206 ORIG_RAX: ffffffffffffff11
RAX: ffff8801c9136180 RBX: ffff8801c8a6de00 RCX: ffff8801c8a6dec4
RDX: 0000000000000100 RSI: ffff8801c6901340 RDI: 0000000000000000
RBP: ffff8801db206738 R08: 0000000000000000 R09: ffff8801db206aa8
R10: 000000000000000b R11: ffffed003b640d5f R12: ffff8801c6901358
R13: ffff8801db206aa8 R14: 000000000000d4f8 R15: dffffc0000000000
_decode_session6+0x9eb/0x1380 net/ipv6/xfrm6_policy.c:160
__xfrm_decode_session+0x68/0x110 net/xfrm/xfrm_policy.c:2358
__xfrm_policy_check+0x18c/0x2350 net/xfrm/xfrm_policy.c:2393
__xfrm_policy_check2 include/net/xfrm.h:1170 [inline]
xfrm_policy_check include/net/xfrm.h:1175 [inline]
xfrm6_policy_check include/net/xfrm.h:1185 [inline]
rawv6_rcv+0x8f6/0x1200 net/ipv6/raw.c:424
ipv6_raw_deliver net/ipv6/raw.c:224 [inline]
raw6_local_deliver+0x819/0xa80 net/ipv6/raw.c:240
ip6_input_finish+0x3c7/0x17a0 net/ipv6/ip6_input.c:246
NF_HOOK include/linux/netfilter.h:288 [inline]
ip6_input+0xdb/0x560 net/ipv6/ip6_input.c:327
dst_input include/net/dst.h:449 [inline]
ip6_rcv_finish+0x1a9/0x7a0 net/ipv6/ip6_input.c:71
NF_HOOK include/linux/netfilter.h:288 [inline]
ipv6_rcv+0xf37/0x1fa0 net/ipv6/ip6_input.c:208
__netif_receive_skb_core+0x1a41/0x3460 net/core/dev.c:4538
__netif_receive_skb+0x2c/0x1b0 net/core/dev.c:4603
process_backlog+0x203/0x740 net/core/dev.c:5283
napi_poll net/core/dev.c:5681 [inline]
net_rx_action+0x792/0x1910 net/core/dev.c:5747
__do_softirq+0x2d7/0xb85 kernel/softirq.c:285
do_softirq_own_stack+0x2a/0x40 arch/x86/entry/entry_64.S:1133
do_softirq.part.21+0x14d/0x190 kernel/softirq.c:329
do_softirq kernel/softirq.c:177 [inline]
__local_bh_enable_ip+0x1ee/0x230 kernel/softirq.c:182
local_bh_enable include/linux/bottom_half.h:32 [inline]
rcu_read_unlock_bh include/linux/rcupdate.h:727 [inline]
ip6_finish_output2+0xba0/0x23a0 net/ipv6/ip6_output.c:121
? ip
Lost 123 message(s)!
rcu_sched kthread starved for 125002 jiffies! g42018 c42017 f0x0 RCU_GP_WAIT_FQS(3) ->state=0x402 ->cpu=0
rcu_sched I23456 8 2 0x80000000
Call Trace:
context_switch kernel/sched/core.c:2799 [inline]
__schedule+0x8eb/0x2060 kernel/sched/core.c:3375
schedule+0xf5/0x430 kernel/sched/core.c:3434
schedule_timeout+0x118/0x230 kernel/time/timer.c:1793
rcu_gp_kthread+0x9e5/0x1930 kernel/rcu/tree.c:2314
kthread+0x33c/0x400 kernel/kthread.c:238
ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:524
0-...!: (125000 ticks this GP) idle=4ce/140000000000001/0 softirq=73013/73013 fqs=0
(t=126328 jiffies g=42018 c=42017 q=207)
rcu_sched kthread starved for 126333 jiffies! g42018 c42017 f0x2 RCU_GP_WAIT_FQS(3) ->state=0x0 ->cpu=0
rcu_sched R running task 23456 8 2 0x80000000
Call Trace:
context_switch kernel/sched/core.c:2799 [inline]
__schedule+0x8eb/0x2060 kernel/sched/core.c:3375
schedule+0xf5/0x430 kernel/sched/core.c:3434
schedule_timeout+0x118/0x230 kernel/time/timer.c:1793
rcu_gp_kthread+0x9e5/0x1930 kernel/rcu/tree.c:2314
kthread+0x33c/0x400 kernel/kthread.c:238
ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:524
NMI backtrace for cpu 0
CPU: 0 PID: 3174 Comm: syz-executor5 Not tainted 4.15.0-rc7+ #181
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
__dump_stack lib/dump_stack.c:17 [inline]
dump_stack+0x194/0x257 lib/dump_stack.c:53
nmi_cpu_backtrace+0x1d2/0x210 lib/nmi_backtrace.c:103
nmi_trigger_cpumask_backtrace+0x122/0x180 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:156 [inline]
rcu_dump_cpu_stacks+0x186/0x1d9 kernel/rcu/tree.c:1459
print_cpu_stall kernel/rcu/tree.c:1608 [inline]
check_cpu_stall.isra.61+0xbb8/0x15b0 kernel/rcu/tree.c:1676
__rcu_pending kernel/rcu/tree.c:3440 [inline]
rcu_pending kernel/rcu/tree.c:3502 [inline]
rcu_check_callbacks+0x256/0xd00 kernel/rcu/tree.c:2842
update_process_times+0x30/0x60 kernel/time/timer.c:1628
tick_sched_handle+0x85/0x160 kernel/time/tick-sched.c:162
tick_sched_timer+0x42/0x120 kernel/time/tick-sched.c:1194
__run_hrtimer kernel/time/hrtimer.c:1211 [inline]
__hrtimer_run_queues+0x358/0xe20 kernel/time/hrtimer.c:1275
hrtimer_interrupt+0x1c2/0x5e0 kernel/time/hrtimer.c:1309
local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1025 [inline]
smp_apic_timer_interrupt+0x14a/0x700 arch/x86/kernel/apic/apic.c:1050
apic_timer_interrupt+0xa9/0xb0 arch/x86/entry/entry_64.S:920
RIP: 0010:check_kcov_mode kernel/kcov.c:67 [inline]
RIP: 0010:__sanitizer_cov_trace_pc+0x1a/0x50 kernel/kcov.c:101
RSP: 0018:ffff8801db206738 EFLAGS: 00000206 ORIG_RAX: ffffffffffffff11
RAX: ffff8801c9136180 RBX: ffff8801c8a6de00 RCX: ffff8801c8a6dec4
RDX: 0000000000000100 RSI: ffff8801c6901340 RDI: 0000000000000000
RBP: ffff8801db206738 R08: 0000000000000000 R09: ffff8801db206aa8
R10: 000000000000000b R11: ffffed003b640d5f R12: ffff8801c6901358
R13: ffff8801db206aa8 R14: 000000000000d4f8 R15: dffffc0000000000
_decode_session6+0x9eb/0x1380 net/ipv6/xfrm6_policy.c:160
__xfrm_decode_session+0x68/0x110 net/xfrm/xfrm_policy.c:2358
__xfrm_policy_check+0x18c/0x2350 net/xfrm/xfrm_policy.c:2393
__xfrm_policy_check2 include/net/xfrm.h:1170 [inline]
xfrm_policy_check include/net/xfrm.h:1175 [inline]
xfrm6_policy_check include/net/xfrm.h:1185 [inline]
rawv6_rcv+0x8f6/0x1200 net/ipv6/raw.c:424
ipv6_raw_deliver net/ipv6/raw.c:224 [inline]
raw6_local_deliver+0x819/0xa80 net/ipv6/raw.c:240
ip6_input_finish+0x3c7/0x17a0 net/ipv6/ip6_input.c:246
NF_HOOK include/linux/netfilter.h:288 [inline]
ip6_input+0xdb/0x560 net/ipv6/ip6_input.c:327
dst_input include/net/dst.h:449 [inline]
ip6_rcv_finish+0x1a9/0x7a0 net/ipv6/ip6_input.c:71
NF_HOOK include/linux/netfilter.h:288 [inline]
ipv6_rcv+0xf37/0x1fa0 net/ipv6/ip6_input.c:208
__netif_receive_skb_core+0x1a41/0x3460 net/core/dev.c:4538
__netif_receive_skb+0x2c/0x1b0 net/core/dev.c:4603
process_backlog+0x203/0x740 net/core/dev.c:5283
napi_poll net/core/dev.c:5681 [inline]
net_rx_action+0x792/0x1910 net/core/dev.c:5747
__do_softirq+0x2d7/0xb85 kernel/softirq.c:285
do_softirq_own_stack+0x2a/0x40 arch/x86/entry/entry_64.S:1133
do_softirq.part.21+0x14d/0x190 kernel/softirq.c:329
do_softirq kernel/softirq.c:177 [inline]
__local_bh_enable_ip+0x1ee/0x230 kernel/softirq.c:182
local_bh_enable include/linux/bottom_half.h:32 [inline]
rcu_read_unlock_bh include/linux/rcupdate.h:727 [inline]
ip6_finish_output2+0xba0/0x23a0 net/ipv6/ip6_output.c:121
ip6_finish_output+0x698/0xaf0 net/ipv6/ip6_output.c:154
NF_HOOK_COND include/linux/netfilter.h:277 [inline]
ip6_output+0x1eb/0x840 net/ipv6/ip6_output.c:171
dst_output include/net/dst.h:443 [inline]
ip6_local_out+0x95/0x160 net/ipv6/output_core.c:176
ip6_send_skb+0xa1/0x330 net/ipv6/ip6_output.c:1675
ip6_push_pending_frames+0xb3/0xe0 net/ipv6/ip6_output.c:1695
rawv6_push_pending_frames net/ipv6/raw.c:616 [inline]
rawv6_sendmsg+0x2eed/0x3e70 net/ipv6/raw.c:935
inet_sendmsg+0x11f/0x5e0 net/ipv4/af_inet.c:764
sock_sendmsg_nosec net/socket.c:628 [inline]
sock_sendmsg+0xca/0x110 net/socket.c:638
SYSC_sendto+0x361/0x5c0 net/socket.c:1719
SyS_sendto+0x40/0x50 net/socket.c:1687
entry_SYSCALL_64_fastpath+0x23/0x9a
RIP: 0033:0x452ac9
RSP: 002b:00007f94cdf88c58 EFLAGS: 00000212 ORIG_RAX: 000000000000002c
RAX: ffffffffffffffda RBX: 000000000071bea0 RCX: 0000000000452ac9
RDX: 000000000000fe89 RSI: 0000000020ee9000 RDI: 0000000000000015
RBP: 0000000000000576 R08: 000000002092bfe4 R09: 000000000000002c
R10: 0000000000000000 R11: 0000000000000212 R12: 00000000006f63b0
R13: 00000000ffffffff R14: 00007f94cdf896d4 R15: 0000000000000000
INFO: NMI handler (nmi_cpu_backtrace_handler) took too long to run: 1.231 msecs