INFO: rcu_preempt self-detected stall on CPU
0-...: (1 GPs behind) idle=6ce/140000000000002/0 softirq=12448/12449 fqs=3
(t=10500 jiffies g=1968 c=1967 q=732)
rcu_preempt kthread starved for 7853 jiffies! g1968 c1967 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: 7954 Comm: syz-executor.4 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:orc_find arch/x86/kernel/unwind_orc.c:111 [inline]
RIP: 0010:unwind_next_frame+0x530/0x17a0 arch/x86/kernel/unwind_orc.c:348
RSP: 0018:ffff8880aea071b8 EFLAGS: 00000a07 ORIG_RAX: ffffffffffffff10
RAX: 0000000000056000 RBX: ffff8880aea07268 RCX: 0000000000056000
RDX: dffffc0000000000 RSI: 0000000000000000 RDI: ffffffff896b7f84
RBP: 1ffff11015d40e3e R08: 0000000000000001 R09: ffff8880a43dff00
R10: ffff8880aea0729d R11: 0000000000058071 R12: ffffffff86600085
R13: ffff8880aea072a0 R14: ffff8880aea072b0 R15: 0000000000000001
__save_stack_trace+0x6b/0xd0 arch/x86/kernel/stacktrace.c:44
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
kmem_cache_zalloc include/linux/slab.h:651 [inline]
fill_pool lib/debugobjects.c:110 [inline]
__debug_object_init+0x5b7/0x830 lib/debugobjects.c:341
debug_object_init lib/debugobjects.c:393 [inline]
debug_object_activate+0x274/0x450 lib/debugobjects.c:474
debug_rcu_head_queue kernel/rcu/rcu.h:152 [inline]
__call_rcu.constprop.0+0x31/0x7e0 kernel/rcu/tree.c:3050
dst_release+0x56/0x80 net/core/dst.c:188
refdst_drop include/net/dst.h:286 [inline]
skb_dst_drop include/net/dst.h:298 [inline]
__dev_queue_xmit+0x17df/0x25c0 net/core/dev.c:3484
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:__read_once_size include/linux/compiler.h:183 [inline]
RIP: 0010:d_alloc_parallel+0x19a/0x1740 fs/dcache.c:2501
RSP: 0018:ffff8880a43df858 EFLAGS: 00000a02 ORIG_RAX: ffffffffffffff10
RAX: 1ffff11012b921b0 RBX: ffff888095c909f8 RCX: ffffc90008c4b000
RDX: 0000000000000000 RSI: ffffffff81909d65 RDI: ffff888095c90d80
RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000020012
R10: ffff88808609cc50 R11: ffff88808609c380 R12: ffff88808191f880
R13: ffff88808191f880 R14: dffffc0000000000 R15: ffff88808191f880
lookup_open+0x466/0x1750 fs/namei.c:3154
do_last fs/namei.c:3334 [inline]
path_openat+0x1878/0x3c50 fs/namei.c:3569
do_filp_open+0x18e/0x250 fs/namei.c:3603
do_sys_open+0x29d/0x3f0 fs/open.c:1084
do_syscall_64+0x1d5/0x640 arch/x86/entry/common.c:292
entry_SYSCALL_64_after_hwframe+0x42/0xb7
RIP: 0033:0x416241
RSP: 002b:00007f0ccebbabb0 EFLAGS: 00000293 ORIG_RAX: 0000000000000002
RAX: ffffffffffffffda RBX: 00007f0ccebbb6d4 RCX: 0000000000416241
RDX: 00007f0ccebbabe1 RSI: 0000000000000002 RDI: 00007f0ccebbabd0
RBP: 000000000076bf20 R08: 0000000000000000 R09: 0000000000000011
R10: 0000000000000006 R11: 0000000000000293 R12: 00000000ffffffff
R13: 0000000000000c19 R14: 00000000004ce0bc R15: 000000000076bf2c
INFO: rcu_sched detected stalls on CPUs/tasks:
(detected by 1, t=10587 jiffies, g=1380, c=1379, q=1)
All QSes seen, last rcu_sched kthread activity 10588 (4294963266-4294952678), jiffies_till_next_fqs=1, root ->qsmask 0x0
syz-executor.2 R running task 27424 7956 7391 0x00000008
Call Trace:
sched_show_task kernel/sched/core.c:5168 [inline]
sched_show_task.cold+0x2e3/0x347 kernel/sched/core.c:5143
print_other_cpu_stall kernel/rcu/tree.c:1501 [inline]
check_cpu_stall kernel/rcu/tree.c:1616 [inline]
__rcu_pending kernel/rcu/tree.c:3390 [inline]
rcu_pending kernel/rcu/tree.c:3452 [inline]
rcu_check_callbacks.cold+0xd3f/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:on_stack arch/x86/include/asm/stacktrace.h:41 [inline]
RIP: 0010:stack_access_ok+0x51/0x130 arch/x86/kernel/unwind_orc.c:279
RSP: 0018:ffff8880aeb07630 EFLAGS: 00000246 ORIG_RAX: ffffffffffffff10
RAX: dffffc0000000000 RBX: 1ffff11015d60ecb RCX: 1ffff11015d60eef
RDX: 0000000000000008 RSI: ffff8880aeb07a10 RDI: ffff8880aeb07778
RBP: ffff8880aeb07a10 R08: 0000000000000001 R09: ffff8880aeb077f8
R10: ffff8880aeb077a5 R11: 0000000000058071 R12: ffff8880aeb07770
R13: dffffc0000000000 R14: ffff8880aeb07a20 R15: 0000000000000002
deref_stack_reg+0x56/0xc0 arch/x86/kernel/unwind_orc.c:289
unwind_next_frame+0xeff/0x17a0 arch/x86/kernel/unwind_orc.c:474
__save_stack_trace+0x6b/0xd0 arch/x86/kernel/stacktrace.c:44
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
slab_post_alloc_hook mm/slab.h:442 [inline]
slab_alloc mm/slab.c:3390 [inline]
kmem_cache_alloc_trace+0x137/0x7b0 mm/slab.c:3616
kmalloc include/linux/slab.h:488 [inline]
dst_cow_metrics_generic+0x48/0x130 net/core/dst.c:210
ipv6_cow_metrics+0x70/0x180 net/ipv6/route.c:196
dst_metrics_write_ptr include/net/dst.h:146 [inline]
dst_metric_set include/net/dst.h:207 [inline]
icmp6_dst_alloc+0x3f6/0x580 net/ipv6/route.c:1780
ndisc_send_skb+0xc0f/0x11e0 net/ipv6/ndisc.c:463
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:__read_once_size include/linux/compiler.h:183 [inline]
RIP: 0010:atomic_read arch/x86/include/asm/atomic.h:27 [inline]
RIP: 0010:queued_spin_trylock include/asm-generic/qspinlock.h:71 [inline]
RIP: 0010:do_raw_spin_trylock+0x1a/0xc0 kernel/locking/spinlock_debug.c:119
RSP: 0018:ffff88805aaaf968 EFLAGS: 00000a02 ORIG_RAX: ffffffffffffff10
RAX: dffffc0000000000 RBX: ffff888091811900 RCX: 0000000000000000
RDX: 0000000000000000 RSI: ffffffff81904a0a RDI: ffff888091811900
RBP: ffff888091bf36e0 R08: 0000000000001914 R09: 0000000000000003
R10: ffff8880a47d8cd0 R11: ffff8880a47d8400 R12: dffffc0000000000
R13: ffff888091bf3760 R14: ffffffff81904597 R15: 0000000000000000
__raw_spin_trylock include/linux/spinlock_api_smp.h:89 [inline]
_raw_spin_trylock+0x18/0x70 kernel/locking/spinlock.c:136
spin_trylock include/linux/spinlock.h:327 [inline]
dentry_kill fs/dcache.c:625 [inline]
dput.part.0+0x4a6/0x710 fs/dcache.c:847
dput+0x1b/0x30 fs/dcache.c:811
lookup_open+0x672/0x1750 fs/namei.c:3257
do_last fs/namei.c:3334 [inline]
path_openat+0x1878/0x3c50 fs/namei.c:3569
do_filp_open+0x18e/0x250 fs/namei.c:3603
do_sys_open+0x29d/0x3f0 fs/open.c:1084
do_syscall_64+0x1d5/0x640 arch/x86/entry/common.c:292
entry_SYSCALL_64_after_hwframe+0x42/0xb7
RIP: 0033:0x416241
RSP: 002b:00007f92b0fdbbb0 EFLAGS: 00000293 ORIG_RAX: 0000000000000002
RAX: ffffffffffffffda RBX: 00007f92b0fdc6d4 RCX: 0000000000416241
RDX: 00007f92b0fdbbe1 RSI: 0000000000000002 RDI: 00007f92b0fdbbd0
RBP: 000000000076bf20 R08: 0000000000000000 R09: 0000000000000011
R10: 0000000000000006 R11: 0000000000000293 R12: 00000000ffffffff
R13: 0000000000000c19 R14: 00000000004ce0bc R15: 000000000076bf2c
rcu_sched kthread starved for 10637 jiffies! g1380 c1379 f0x2 RCU_GP_WAIT_FQS(3) ->state=0x0 ->cpu=0
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