INFO: rcu_preempt self-detected stall on CPU
0-...: (1 GPs behind) idle=bfe/140000000000002/0 softirq=13121/13122 fqs=3
(t=10500 jiffies g=2027 c=2026 q=877)
rcu_preempt kthread starved for 10445 jiffies! g2027 c2026 f0x0 RCU_GP_WAIT_FQS(3) ->state=0x0 ->cpu=1
rcu_preempt R running task 29920 8 2 0x80000000
Call Trace:
schedule+0x8d/0x1b0 kernel/sched/core.c:3428
schedule_timeout+0x43c/0xe40 kernel/time/timer.c:1746
rcu_gp_kthread+0xb8e/0x1ce0 kernel/rcu/tree.c:2255
kthread+0x30d/0x420 kernel/kthread.c:232
ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:404
NMI backtrace for cpu 0
CPU: 0 PID: 8049 Comm: syz-executor.0 Not tainted 4.14.172-syzkaller #0
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+0x13e/0x194 lib/dump_stack.c:58
nmi_cpu_backtrace.cold+0x57/0x93 lib/nmi_backtrace.c:101
nmi_trigger_cpumask_backtrace+0x139/0x17e lib/nmi_backtrace.c:62
trigger_single_cpu_backtrace include/linux/nmi.h:158 [inline]
rcu_dump_cpu_stacks+0x16d/0x1b8 kernel/rcu/tree.c:1396
print_cpu_stall kernel/rcu/tree.c:1542 [inline]
check_cpu_stall kernel/rcu/tree.c:1610 [inline]
__rcu_pending kernel/rcu/tree.c:3390 [inline]
rcu_pending kernel/rcu/tree.c:3452 [inline]
rcu_check_callbacks.cold+0x490/0xdaa kernel/rcu/tree.c:2792
update_process_times+0x29/0x60 kernel/time/timer.c:1590
tick_sched_handle+0x7d/0x150 kernel/time/tick-sched.c:165
tick_sched_timer+0x3e/0x120 kernel/time/tick-sched.c:1223
__run_hrtimer kernel/time/hrtimer.c:1223 [inline]
__hrtimer_run_queues+0x25c/0xbb0 kernel/time/hrtimer.c:1287
hrtimer_interrupt+0x1e6/0x5e0 kernel/time/hrtimer.c:1321
local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1075 [inline]
smp_apic_timer_interrupt+0x117/0x5e0 arch/x86/kernel/apic/apic.c:1100
apic_timer_interrupt+0x8f/0xa0 arch/x86/entry/entry_64.S:792
RIP: 0010:ipv6_get_saddr_eval net/ipv6/addrconf.c:1485 [inline]
RIP: 0010:ipv6_get_saddr_eval+0x38c/0xe60 net/ipv6/addrconf.c:1421
RSP: 0018:ffff8880aea07220 EFLAGS: 00000246 ORIG_RAX: ffffffffffffff10
RAX: dffffc0000000000 RBX: ffff8880aea07370 RCX: 0000000000000003
RDX: 1ffff1101305e1c4 RSI: ffff8880aea07370 RDI: ffff8880982f0e20
RBP: 0000000000000003 R08: 000000000000347a R09: ffffffff8a075c90
R10: ffff888080118fd8 R11: ffff888080118640 R12: ffff888055954180
R13: ffff8880982f0d00 R14: ffff8880aea07310 R15: 00000000ffffff82
__ipv6_dev_get_saddr+0x1dc/0x560 net/ipv6/addrconf.c:1597
ipv6_dev_get_saddr+0x711/0x9b0 net/ipv6/addrconf.c:1737
ip6_route_get_saddr include/net/ip6_route.h:111 [inline]
ip6_dst_lookup_tail+0x10ab/0x1750 net/ipv6/ip6_output.c:977
geneve_get_v6_dst+0x3f2/0x880 drivers/net/geneve.c:799
geneve6_xmit_skb drivers/net/geneve.c:875 [inline]
geneve_xmit+0x232/0x26b0 drivers/net/geneve.c:927
__netdev_start_xmit include/linux/netdevice.h:4039 [inline]
netdev_start_xmit include/linux/netdevice.h:4048 [inline]
xmit_one net/core/dev.c:3009 [inline]
dev_hard_start_xmit+0x186/0x890 net/core/dev.c:3025
__dev_queue_xmit+0x1d91/0x25c0 net/core/dev.c:3525
neigh_hh_output include/net/neighbour.h:490 [inline]
neigh_output include/net/neighbour.h:498 [inline]
ip6_finish_output2+0x1085/0x2150 net/ipv6/ip6_output.c:120
ip6_finish_output+0x4d9/0xaf0 net/ipv6/ip6_output.c:154
NF_HOOK_COND include/linux/netfilter.h:239 [inline]
ip6_output+0x1c9/0x650 net/ipv6/ip6_output.c:171
dst_output include/net/dst.h:462 [inline]
NF_HOOK include/linux/netfilter.h:250 [inline]
ndisc_send_skb+0xb56/0x11e0 net/ipv6/ndisc.c:483
ndisc_send_rs+0x125/0x630 net/ipv6/ndisc.c:677
addrconf_rs_timer+0x289/0x5a0 net/ipv6/addrconf.c:3757
call_timer_fn+0x14a/0x650 kernel/time/timer.c:1279
expire_timers kernel/time/timer.c:1318 [inline]
__run_timers kernel/time/timer.c:1636 [inline]
__run_timers kernel/time/timer.c:1604 [inline]
run_timer_softirq+0x52a/0x1390 kernel/time/timer.c:1649
__do_softirq+0x254/0x9bf kernel/softirq.c:288
invoke_softirq kernel/softirq.c:368 [inline]
irq_exit+0x15b/0x1a0 kernel/softirq.c:409
exiting_irq arch/x86/include/asm/apic.h:648 [inline]
smp_apic_timer_interrupt+0x141/0x5e0 arch/x86/kernel/apic/apic.c:1102
apic_timer_interrupt+0x8f/0xa0 arch/x86/entry/entry_64.S:792
RIP: 0010:preempt_schedule_irq+0xa6/0x140 kernel/sched/core.c:3611
RSP: 0018:ffff888049f571e0 EFLAGS: 00000282 ORIG_RAX: ffffffffffffff10
RAX: 1ffffffff0fa2ce3 RBX: dffffc0000000000 RCX: 1ffff110100231dc
RDX: 0000000000000000 RSI: ffff888080118ec0 RDI: ffff888080118ebc
RBP: ffffed10100230c8 R08: 0000003d9611eca3 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000000 R12: ffff888080118640
R13: ffffffff87d16718 R14: 0000000000000000 R15: 0000000000000000
retint_kernel+0x1b/0x2d
RIP: 0010:arch_local_irq_restore arch/x86/include/asm/paravirt.h:779 [inline]
RIP: 0010:lock_release+0x41e/0x7f0 kernel/locking/lockdep.c:4016
RSP: 0018:ffff888049f572b0 EFLAGS: 00000286 ORIG_RAX: ffffffffffffff10
RAX: 1ffffffff0fa2ce1 RBX: 1ffff110093eae5a RCX: 1ffff110100231d6
RDX: dffffc0000000000 RSI: 0000000000000002 RDI: 0000000000000286
RBP: ffff888080118640 R08: 0000000000000001 R09: 0000000000000001
R10: ffff888080118ee8 R11: ffff888080118640 R12: ffffffff8163234c
R13: 0000000000000003 R14: ffff888080118640 R15: 0000000000000002
rcu_lock_release include/linux/rcupdate.h:247 [inline]
rcu_read_unlock include/linux/rcupdate.h:685 [inline]
is_bpf_text_address+0xa3/0x120 kernel/bpf/core.c:458
kernel_text_address+0x6e/0xe0 kernel/extable.c:150
__kernel_text_address+0x9/0x30 kernel/extable.c:105
unwind_get_return_address arch/x86/kernel/unwind_orc.c:255 [inline]
unwind_get_return_address+0x5a/0xa0 arch/x86/kernel/unwind_orc.c:250
__save_stack_trace+0x7b/0xd0 arch/x86/kernel/stacktrace.c:45
save_stack+0x32/0xa0 mm/kasan/kasan.c:447
set_track mm/kasan/kasan.c:459 [inline]
kasan_kmalloc mm/kasan/kasan.c:551 [inline]
kasan_kmalloc+0xbf/0xe0 mm/kasan/kasan.c:529
kmem_cache_alloc+0x127/0x770 mm/slab.c:3552
__d_alloc+0x2a/0x9b0 fs/dcache.c:1623
d_alloc+0x46/0x250 fs/dcache.c:1710
d_alloc_parallel+0xd7/0x1740 fs/dcache.c:2492
lookup_slow+0x175/0x410 fs/namei.c:1679
walk_component+0x648/0x1bd0 fs/namei.c:1825
lookup_last fs/namei.c:2293 [inline]
path_lookupat.isra.0+0x1bb/0x7b0 fs/namei.c:2343
filename_lookup+0x18e/0x380 fs/namei.c:2377
user_path include/linux/namei.h:62 [inline]
do_mount+0x10b/0x24f0 fs/namespace.c:2819
SYSC_mount fs/namespace.c:3095 [inline]
SyS_mount+0xa8/0x120 fs/namespace.c:3072
do_syscall_64+0x1d5/0x640 arch/x86/entry/common.c:292
entry_SYSCALL_64_after_hwframe+0x42/0xb7
RIP: 0033:0x45c479
RSP: 002b:00007f49a852cc78 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5
RAX: ffffffffffffffda RBX: 00007f49a852d6d4 RCX: 000000000045c479
RDX: 0000000020000280 RSI: 00000000200001c0 RDI: 0000000020000180
RBP: 000000000076bf20 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000120080 R11: 0000000000000246 R12: 00000000ffffffff
R13: 000000000000074d R14: 00000000004c9cb9 R15: 000000000076bf2c
INFO: rcu_sched detected stalls on CPUs/tasks:
0-...: (1 GPs behind) idle=bfe/140000000000002/0 softirq=13121/13122 fqs=3
(detected by 1, t=10593 jiffies, g=1446, c=1445, q=12)
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 PID: 8049 Comm: syz-executor.0 Not tainted 4.14.172-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
task: ffff888080118640 task.stack: ffff888049f50000
RIP: 0010:match_held_lock+0x2c1/0x5c0 kernel/locking/lockdep.c:3554
RSP: 0018:ffff8880aea07428 EFLAGS: 00000046
RAX: dffffc0000000000 RBX: ffff888080118ee8 RCX: ffff8880aea25c18
RDX: 0000000000000000 RSI: ffff8880aea25b58 RDI: ffff888080118f0a
RBP: ffff8880aea25b58 R08: 00000056404919d6 R09: ffff88821fff7008
R10: ffff88821fff7010 R11: 0000000000000001 R12: 1ffff11015d40e86
R13: ffff8880aea25b58 R14: 0000000000000000 R15: 0000000000000001
FS: 00007f49a852d700(0000) GS:ffff8880aea00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b32221000 CR3: 0000000085441000 CR4: 00000000001406f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
__lock_is_held+0xad/0x140 kernel/locking/lockdep.c:3814
lock_is_held_type+0x10d/0x210 kernel/locking/lockdep.c:4032
lock_is_held include/linux/lockdep.h:437 [inline]
__run_hrtimer kernel/time/hrtimer.c:1191 [inline]
__hrtimer_run_queues+0x3dd/0xbb0 kernel/time/hrtimer.c:1287
hrtimer_interrupt+0x1e6/0x5e0 kernel/time/hrtimer.c:1321
local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1075 [inline]
smp_apic_timer_interrupt+0x117/0x5e0 arch/x86/kernel/apic/apic.c:1100
apic_timer_interrupt+0x8f/0xa0 arch/x86/entry/entry_64.S:792
RIP: 0010:trace_net_dev_xmit include/trace/events/net.h:71 [inline]
RIP: 0010:xmit_one net/core/dev.c:3010 [inline]
RIP: 0010:dev_hard_start_xmit+0x5dd/0x890 net/core/dev.c:3025
RSP: 0018:ffff8880aea07760 EFLAGS: 00000246 ORIG_RAX: ffffffffffffff10
RAX: ffff888080118640 RBX: ffff88809b4bf2c0 RCX: 1ffffffff1027974
RDX: 0000000000000100 RSI: ffffffff87d84360 RDI: ffff888080118ebc
RBP: dffffc0000000000 R08: 0000000000000001 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000
R13: ffff88805171a600 R14: ffff88809ac31500 R15: 0000000000000000
__dev_queue_xmit+0x1d91/0x25c0 net/core/dev.c:3525
neigh_hh_output include/net/neighbour.h:490 [inline]
neigh_output include/net/neighbour.h:498 [inline]
ip6_finish_output2+0x1085/0x2150 net/ipv6/ip6_output.c:120
ip6_finish_output+0x4d9/0xaf0 net/ipv6/ip6_output.c:154
NF_HOOK_COND include/linux/netfilter.h:239 [inline]
ip6_output+0x1c9/0x650 net/ipv6/ip6_output.c:171
dst_output include/net/dst.h:462 [inline]
NF_HOOK include/linux/netfilter.h:250 [inline]
ndisc_send_skb+0xb56/0x11e0 net/ipv6/ndisc.c:483
ndisc_send_rs+0x125/0x630 net/ipv6/ndisc.c:677
addrconf_rs_timer+0x289/0x5a0 net/ipv6/addrconf.c:3757
call_timer_fn+0x14a/0x650 kernel/time/timer.c:1279
expire_timers kernel/time/timer.c:1318 [inline]
__run_timers kernel/time/timer.c:1636 [inline]
__run_timers kernel/time/timer.c:1604 [inline]
run_timer_softirq+0x52a/0x1390 kernel/time/timer.c:1649
__do_softirq+0x254/0x9bf kernel/softirq.c:288
invoke_softirq kernel/softirq.c:368 [inline]
irq_exit+0x15b/0x1a0 kernel/softirq.c:409
exiting_irq arch/x86/include/asm/apic.h:648 [inline]
smp_apic_timer_interrupt+0x141/0x5e0 arch/x86/kernel/apic/apic.c:1102
apic_timer_interrupt+0x8f/0xa0 arch/x86/entry/entry_64.S:792
RIP: 0010:preempt_schedule_irq+0xa6/0x140 kernel/sched/core.c:3611
RSP: 0018:ffff888049f571e0 EFLAGS: 00000282 ORIG_RAX: ffffffffffffff10
RAX: 1ffffffff0fa2ce3 RBX: dffffc0000000000 RCX: 1ffff110100231dc
RDX: 0000000000000000 RSI: ffff888080118ec0 RDI: ffff888080118ebc
RBP: ffffed10100230c8 R08: 0000003d9611eca3 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000000 R12: ffff888080118640
R13: ffffffff87d16718 R14: 0000000000000000 R15: 0000000000000000
retint_kernel+0x1b/0x2d
RIP: 0010:arch_local_irq_restore arch/x86/include/asm/paravirt.h:779 [inline]
RIP: 0010:lock_release+0x41e/0x7f0 kernel/locking/lockdep.c:4016
RSP: 0018:ffff888049f572b0 EFLAGS: 00000286 ORIG_RAX: ffffffffffffff10
RAX: 1ffffffff0fa2ce1 RBX: 1ffff110093eae5a RCX: 1ffff110100231d6
RDX: dffffc0000000000 RSI: 0000000000000002 RDI: 0000000000000286
RBP: ffff888080118640 R08: 0000000000000001 R09: 0000000000000001
R10: ffff888080118ee8 R11: ffff888080118640 R12: ffffffff8163234c
R13: 0000000000000003 R14: ffff888080118640 R15: 0000000000000002
rcu_lock_release include/linux/rcupdate.h:247 [inline]
rcu_read_unlock include/linux/rcupdate.h:685 [inline]
is_bpf_text_address+0xa3/0x120 kernel/bpf/core.c:458
kernel_text_address+0x6e/0xe0 kernel/extable.c:150
__kernel_text_address+0x9/0x30 kernel/extable.c:105
unwind_get_return_address arch/x86/kernel/unwind_orc.c:255 [inline]
unwind_get_return_address+0x5a/0xa0 arch/x86/kernel/unwind_orc.c:250
__save_stack_trace+0x7b/0xd0 arch/x86/kernel/stacktrace.c:45
save_stack+0x32/0xa0 mm/kasan/kasan.c:447
set_track mm/kasan/kasan.c:459 [inline]
kasan_kmalloc mm/kasan/kasan.c:551 [inline]
kasan_kmalloc+0xbf/0xe0 mm/kasan/kasan.c:529
kmem_cache_alloc+0x127/0x770 mm/slab.c:3552
__d_alloc+0x2a/0x9b0 fs/dcache.c:1623
d_alloc+0x46/0x250 fs/dcache.c:1710
d_alloc_parallel+0xd7/0x1740 fs/dcache.c:2492
lookup_slow+0x175/0x410 fs/namei.c:1679
walk_component+0x648/0x1bd0 fs/namei.c:1825
lookup_last fs/namei.c:2293 [inline]
path_lookupat.isra.0+0x1bb/0x7b0 fs/namei.c:2343
filename_lookup+0x18e/0x380 fs/namei.c:2377
user_path include/linux/namei.h:62 [inline]
do_mount+0x10b/0x24f0 fs/namespace.c:2819
SYSC_mount fs/namespace.c:3095 [inline]
SyS_mount+0xa8/0x120 fs/namespace.c:3072
do_syscall_64+0x1d5/0x640 arch/x86/entry/common.c:292
entry_SYSCALL_64_after_hwframe+0x42/0xb7
RIP: 0033:0x45c479
RSP: 002b:00007f49a852cc78 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5
RAX: ffffffffffffffda RBX: 00007f49a852d6d4 RCX: 000000000045c479
RDX: 0000000020000280 RSI: 00000000200001c0 RDI: 0000000020000180
RBP: 000000000076bf20 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000120080 R11: 0000000000000246 R12: 00000000ffffffff
R13: 000000000000074d R14: 00000000004c9cb9 R15: 000000000076bf2c
Code: 14 11 38 d0 7c 08 84 d2 0f 85 d9 02 00 00 44 8b 35 75 9b 20 09 45 85 f6 0f 84 38 e5 00 00 45 31 f6 48 b8 00 00 00 00 00 fc ff df <49> c7 04 04 00 00 00 00 48 83 c4 48 44 89 f0 5b 5d 41 5c 41 5d
rcu_sched kthread starved for 10539 jiffies! g1446 c1445 f0x0 RCU_GP_WAIT_FQS(3) ->state=0x0 ->cpu=1
rcu_sched R running task 29984 9 2 0x80000000
Call Trace:
schedule+0x8d/0x1b0 kernel/sched/core.c:3428
schedule_timeout+0x43c/0xe40 kernel/time/timer.c:1746
rcu_gp_kthread+0xb8e/0x1ce0 kernel/rcu/tree.c:2255
kthread+0x30d/0x420 kernel/kthread.c:232
ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:404