rcu: INFO: rcu_preempt self-detected stall on CPU
rcu: 0-....: (1 GPs behind) idle=012/1/0x4000000000000000 softirq=130181/130182 fqs=491
(t=10500 jiffies g=224493 q=1381)
rcu: rcu_preempt kthread starved for 4753 jiffies! g224493 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x0 ->cpu=1
rcu: Unless rcu_preempt kthread gets sufficient CPU time, OOM is now expected behavior.
rcu: RCU grace-period kthread stack dump:
task:rcu_preempt state:R running task stack:28568 pid: 13 ppid: 2 flags:0x00004000
Call Trace:
context_switch kernel/sched/core.c:4313 [inline]
__schedule+0x90c/0x21a0 kernel/sched/core.c:5064
schedule+0xcf/0x270 kernel/sched/core.c:5143
schedule_timeout+0x148/0x250 kernel/time/timer.c:1878
rcu_gp_fqs_loop kernel/rcu/tree.c:1940 [inline]
rcu_gp_kthread+0xbbe/0x1d70 kernel/rcu/tree.c:2113
kthread+0x3b1/0x4a0 kernel/kthread.c:292
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:296
NMI backtrace for cpu 0
CPU: 0 PID: 13399 Comm: syz-executor.2 Not tainted 5.11.0-rc4-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
__dump_stack lib/dump_stack.c:79 [inline]
dump_stack+0x107/0x163 lib/dump_stack.c:120
nmi_cpu_backtrace.cold+0x44/0xd7 lib/nmi_backtrace.c:105
nmi_trigger_cpumask_backtrace+0x1b3/0x230 lib/nmi_backtrace.c:62
trigger_single_cpu_backtrace include/linux/nmi.h:164 [inline]
rcu_dump_cpu_stacks+0x1f4/0x230 kernel/rcu/tree_stall.h:337
print_cpu_stall kernel/rcu/tree_stall.h:569 [inline]
check_cpu_stall kernel/rcu/tree_stall.h:643 [inline]
rcu_pending kernel/rcu/tree.c:3751 [inline]
rcu_sched_clock_irq.cold+0x48e/0xedf kernel/rcu/tree.c:2580
update_process_times+0x16d/0x200 kernel/time/timer.c:1782
tick_sched_handle+0x9b/0x180 kernel/time/tick-sched.c:226
tick_sched_timer+0x1b0/0x2d0 kernel/time/tick-sched.c:1369
__run_hrtimer kernel/time/hrtimer.c:1519 [inline]
__hrtimer_run_queues+0x1c0/0xe40 kernel/time/hrtimer.c:1583
hrtimer_interrupt+0x334/0x940 kernel/time/hrtimer.c:1645
local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1085 [inline]
__sysvec_apic_timer_interrupt+0x146/0x540 arch/x86/kernel/apic/apic.c:1102
run_sysvec_on_irqstack_cond arch/x86/include/asm/irq_stack.h:91 [inline]
sysvec_apic_timer_interrupt+0x48/0x100 arch/x86/kernel/apic/apic.c:1096
asm_sysvec_apic_timer_interrupt+0x12/0x20 arch/x86/include/asm/idtentry.h:628
RIP: 0010:jhash2 include/linux/jhash.h:129 [inline]
RIP: 0010:hash_stack lib/stackdepot.c:156 [inline]
RIP: 0010:stack_depot_save+0xaa/0x4e0 lib/stackdepot.c:248
Code: 01 df c1 c0 06 44 31 c0 29 c3 41 89 d8 89 c3 01 f8 c1 c3 08 44 31 c3 41 89 d8 29 df 01 c3 41 c1 c0 10 44 31 c7 41 89 f8 29 f8 <01> df 41 c1 c8 0d 44 31 c0 41 89 c0 29 c3 01 f8 41 c1 c0 04 44 31
RSP: 0000:ffffc900000072c8 EFLAGS: 00000206
RAX: 0000000002c5f6b2 RBX: 00000000ffbb83af RCX: 000000000000000b
RDX: ffffc900000073d4 RSI: 0000000000000800 RDI: 0000000068e9c507
RBP: ffffc90000007338 R08: 0000000068e9c507 R09: 0000000000000000
R10: 0000000000000001 R11: 0000000000000000 R12: 0000000000000019
R13: 0000000000000019 R14: ffff888028894c00 R15: 0000000000000246
kasan_save_stack+0x32/0x40 mm/kasan/common.c:40
kasan_set_track+0x1c/0x30 mm/kasan/common.c:46
kasan_set_free_info+0x20/0x30 mm/kasan/generic.c:356
____kasan_slab_free+0xe1/0x110 mm/kasan/common.c:362
kasan_slab_free include/linux/kasan.h:192 [inline]
slab_free_hook mm/slub.c:1547 [inline]
slab_free_freelist_hook+0x5d/0x150 mm/slub.c:1580
slab_free mm/slub.c:3142 [inline]
kfree+0xdb/0x3b0 mm/slub.c:4124
skb_free_head net/core/skbuff.c:600 [inline]
skb_release_data+0x6d9/0x910 net/core/skbuff.c:620
skb_release_all net/core/skbuff.c:674 [inline]
__kfree_skb net/core/skbuff.c:688 [inline]
consume_skb net/core/skbuff.c:844 [inline]
consume_skb+0xc2/0x160 net/core/skbuff.c:838
netlink_broadcast_filtered+0x35c/0xdc0 net/netlink/af_netlink.c:1514
netlink_broadcast net/netlink/af_netlink.c:1536 [inline]
nlmsg_multicast include/net/netlink.h:1033 [inline]
nlmsg_notify+0x90/0x250 net/netlink/af_netlink.c:2537
__neigh_notify+0xdc/0x160 net/core/neighbour.c:3368
neigh_cleanup_and_release+0x92/0x340 net/core/neighbour.c:102
neigh_del net/core/neighbour.c:194 [inline]
neigh_remove_one+0x3cf/0x450 net/core/neighbour.c:215
neigh_forced_gc net/core/neighbour.c:244 [inline]
neigh_alloc net/core/neighbour.c:391 [inline]
___neigh_create+0x16a4/0x25d0 net/core/neighbour.c:579
ip6_finish_output2+0xdf8/0x16c0 net/ipv6/ip6_output.c:114
__ip6_finish_output net/ipv6/ip6_output.c:182 [inline]
__ip6_finish_output+0x4c1/0xe10 net/ipv6/ip6_output.c:161
ip6_finish_output+0x35/0x200 net/ipv6/ip6_output.c:192
NF_HOOK_COND include/linux/netfilter.h:290 [inline]
ip6_output+0x1db/0x520 net/ipv6/ip6_output.c:215
dst_output include/net/dst.h:441 [inline]
NF_HOOK include/linux/netfilter.h:301 [inline]
ndisc_send_skb+0xa90/0x1750 net/ipv6/ndisc.c:508
ndisc_send_rs+0x12e/0x700 net/ipv6/ndisc.c:702
addrconf_rs_timer+0x3f2/0x820 net/ipv6/addrconf.c:3874
call_timer_fn+0x1a5/0x6b0 kernel/time/timer.c:1417
expire_timers kernel/time/timer.c:1462 [inline]
__run_timers.part.0+0x67c/0xa50 kernel/time/timer.c:1731
__run_timers kernel/time/timer.c:1712 [inline]
run_timer_softirq+0xb3/0x1d0 kernel/time/timer.c:1744
__do_softirq+0x2bc/0xa29 kernel/softirq.c:343
asm_call_irq_on_stack+0xf/0x20
__run_on_irqstack arch/x86/include/asm/irq_stack.h:26 [inline]
run_on_irqstack_cond arch/x86/include/asm/irq_stack.h:77 [inline]
do_softirq_own_stack+0xaa/0xd0 arch/x86/kernel/irq_64.c:77
invoke_softirq kernel/softirq.c:226 [inline]
__irq_exit_rcu kernel/softirq.c:420 [inline]
irq_exit_rcu+0x134/0x200 kernel/softirq.c:432
sysvec_apic_timer_interrupt+0x4d/0x100 arch/x86/kernel/apic/apic.c:1096
asm_sysvec_apic_timer_interrupt+0x12/0x20 arch/x86/include/asm/idtentry.h:628
RIP: 0010:preempt_schedule_irq+0x49/0x90 kernel/sched/core.c:5326
Code: 55 53 65 48 8b 1c 25 00 f0 01 00 48 89 dd 48 c1 ed 03 48 01 c5 bf 01 00 00 00 e8 72 6e 52 f8 e8 2d 78 7d f8 fb bf 01 00 00 00 02 d1 ff ff 9c 58 fa f6 c4 02 75 27 bf 01 00 00 00 e8 80 5c 52
RSP: 0000:ffffc900095e7e68 EFLAGS: 00000206
RAX: 0000000000030105 RBX: ffff888077143780 RCX: 1ffffffff1a068d9
RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000001
RBP: ffffed100ee286f0 R08: 0000000000000001 R09: 0000000000000001
R10: ffffffff81789cc8 R11: 0000000000000001 R12: 0000000000000000
R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000
irqentry_exit_cond_resched kernel/entry/common.c:393 [inline]
irqentry_exit_cond_resched kernel/entry/common.c:385 [inline]
irqentry_exit+0x7a/0xa0 kernel/entry/common.c:423
asm_sysvec_apic_timer_interrupt+0x12/0x20 arch/x86/include/asm/idtentry.h:628
RIP: 0010:exit_to_user_mode_loop kernel/entry/common.c:161 [inline]
RIP: 0010:exit_to_user_mode_prepare+0x10e/0x250 kernel/entry/common.c:201
Code: f6 c4 02 0f 85 0f 01 00 00 65 48 8b 04 25 00 f0 01 00 48 8b 18 f7 c3 0e 30 02 00 0f 84 2f ff ff ff e8 f6 6b 17 00 fb f6 c3 08 <74> bf e8 6b e6 99 07 f6 c7 10 74 ba 48 89 ef e8 3e b5 32 00 f7 c3
RSP: 0000:ffffc900095e7f30 EFLAGS: 00000202
RAX: 0000000000016ee5 RBX: 0000000000000008 RCX: 1ffffffff1a068d9
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: ffffc900095e7f58 R08: 0000000000000001 R09: 0000000000000001
R10: ffffffff81789cc8 R11: 0000000000000001 R12: ffff888077143780
R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000
irqentry_exit_to_user_mode+0x5/0x30 kernel/entry/common.c:315
asm_sysvec_apic_timer_interrupt+0x12/0x20 arch/x86/include/asm/idtentry.h:628
RIP: 0033:0x412d33
Code: 89 74 24 10 48 89 54 24 18 85 c0 4d 8d 66 08 0f 84 2d 02 00 00 45 31 ed bb 01 00 00 00 31 c0 c7 44 24 08 00 00 00 00 44 89 ea <80> 3d 9e 53 d8 00 00 4d 8b 3c d4 44 89 fa 75 3a be 00 00 00 80 49
RSP: 002b:00007ffc3f70e3f0 EFLAGS: 00000216
RAX: ffffffff8388861a RBX: 0000000000000001 RCX: 0000001b2f920000
RDX: 00000000000039ca RSI: 0000000080000000 RDI: 00000000576c536a
RBP: 000000000119c0b0 R08: 000000000000136a R09: 00000000576c536e
R10: 00007ffc3f70e590 R11: 0000000000000246 R12: 00007f5f46d6e008
R13: 00000000000039ca R14: 00007f5f46d6e000 R15: ffffffff8388861a