rcu: INFO: rcu_preempt self-detected stall on CPU
rcu: 1-...!: (10500 ticks this GP) idle=3b6/1/0x4000000000000002 softirq=68735/68735 fqs=0
rcu: (t=10500 jiffies g=87893 q=2018)
rcu: rcu_preempt kthread starved for 10500 jiffies! g87893 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x402 ->cpu=1
rcu: RCU grace-period kthread stack dump:
rcu_preempt I29024 10 2 0x80000000
Call Trace:
context_switch kernel/sched/core.c:2844 [inline]
__schedule+0x817/0x1cc0 kernel/sched/core.c:3485
schedule+0x92/0x180 kernel/sched/core.c:3529
schedule_timeout+0x4db/0xfd0 kernel/time/timer.c:1803
rcu_gp_fqs_loop kernel/rcu/tree.c:1948 [inline]
rcu_gp_kthread+0x956/0x17a0 kernel/rcu/tree.c:2105
kthread+0x357/0x430 kernel/kthread.c:246
ret_from_fork+0x3a/0x50 arch/x86/entry/entry_64.S:352
NMI backtrace for cpu 1
CPU: 1 PID: 12243 Comm: syz-executor.5 Not tainted 5.0.0-rc6+ #70
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
__dump_stack lib/dump_stack.c:77 [inline]
dump_stack+0x172/0x1f0 lib/dump_stack.c:113
nmi_cpu_backtrace.cold+0x63/0xa4 lib/nmi_backtrace.c:101
nmi_trigger_cpumask_backtrace+0x1be/0x236 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.c:1211
print_cpu_stall kernel/rcu/tree.c:1348 [inline]
check_cpu_stall kernel/rcu/tree.c:1422 [inline]
rcu_pending kernel/rcu/tree.c:3018 [inline]
rcu_check_callbacks.cold+0x500/0xa4a kernel/rcu/tree.c:2521
update_process_times+0x32/0x80 kernel/time/timer.c:1635
tick_sched_handle+0xa2/0x190 kernel/time/tick-sched.c:161
tick_sched_timer+0x47/0x130 kernel/time/tick-sched.c:1271
__run_hrtimer kernel/time/hrtimer.c:1389 [inline]
__hrtimer_run_queues+0x33e/0xde0 kernel/time/hrtimer.c:1451
hrtimer_interrupt+0x314/0x770 kernel/time/hrtimer.c:1509
local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1035 [inline]
smp_apic_timer_interrupt+0x120/0x570 arch/x86/kernel/apic/apic.c:1060
apic_timer_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:807
RIP: 0010:cpu_relax arch/x86/include/asm/processor.h:666 [inline]
RIP: 0010:virt_spin_lock arch/x86/include/asm/qspinlock.h:84 [inline]
RIP: 0010:native_queued_spin_lock_slowpath+0x132/0x970 kernel/locking/qspinlock.c:337
Code: 00 00 00 48 8b 45 d0 65 48 33 04 25 28 00 00 00 0f 85 a2 06 00 00 48 81 c4 98 00 00 00 5b 41 5c 41 5d 41 5e 41 5f 5d c3 f3 90 73 ff ff ff 8b 45 98 4c 8d 65 d8 3d 00 01 00 00 0f 84 e5 00 00
RSP: 0018:ffff88808de1f078 EFLAGS: 00000202 ORIG_RAX: ffffffffffffff13
RAX: 0000000000000000 RBX: ffffe8ffffd75f78 RCX: ffffffff8157bdc7
RDX: 0000000000000000 RSI: 0000000000000004 RDI: ffffe8ffffd75f78
RBP: ffff88808de1f138 R08: 1ffffd1ffffaebef R09: fffff91ffffaebf0
R10: fffff91ffffaebef R11: ffffe8ffffd75f7b R12: 0000000000000001
R13: 0000000000000003 R14: fffff91ffffaebef R15: 00000000000001f8
pv_queued_spin_lock_slowpath arch/x86/include/asm/paravirt.h:653 [inline]
queued_spin_lock_slowpath arch/x86/include/asm/qspinlock.h:50 [inline]
queued_spin_lock include/asm-generic/qspinlock.h:90 [inline]
do_raw_spin_lock+0x20e/0x2e0 kernel/locking/spinlock_debug.c:113
__raw_spin_lock include/linux/spinlock_api_smp.h:143 [inline]
_raw_spin_lock+0x37/0x40 kernel/locking/spinlock.c:144
spin_lock include/linux/spinlock.h:329 [inline]
nf_ct_add_to_unconfirmed_list net/netfilter/nf_conntrack_core.c:462 [inline]
init_conntrack.isra.0+0xa15/0x1180 net/netfilter/nf_conntrack_core.c:1437
resolve_normal_ct net/netfilter/nf_conntrack_core.c:1479 [inline]
nf_conntrack_in+0xa68/0x1070 net/netfilter/nf_conntrack_core.c:1585
ipv4_conntrack_in+0x1e/0x30 net/netfilter/nf_conntrack_proto.c:422
nf_hook_entry_hookfn include/linux/netfilter.h:119 [inline]
nf_hook_slow+0xbf/0x1f0 net/netfilter/core.c:511
nf_hook include/linux/netfilter.h:244 [inline]
NF_HOOK include/linux/netfilter.h:287 [inline]
ip_rcv+0x237/0x3f0 net/ipv4/ip_input.c:524
__netif_receive_skb_one_core+0x115/0x1a0 net/core/dev.c:4973
__netif_receive_skb+0x2c/0x1c0 net/core/dev.c:5083
netif_receive_skb_internal+0x117/0x660 net/core/dev.c:5186
netif_receive_skb+0x6e/0x5a0 net/core/dev.c:5261
tun_rx_batched.isra.0+0x4f7/0x840 drivers/net/tun.c:1562
tun_get_user+0x2588/0x38d0 drivers/net/tun.c:1991
tun_chr_write_iter+0xbd/0x160 drivers/net/tun.c:2019
call_write_iter include/linux/fs.h:1863 [inline]
do_iter_readv_writev+0x5e0/0x8e0 fs/read_write.c:680
do_iter_write fs/read_write.c:956 [inline]
do_iter_write+0x184/0x610 fs/read_write.c:937
vfs_writev+0x1b3/0x2f0 fs/read_write.c:1001
do_writev+0xf6/0x290 fs/read_write.c:1036
__do_sys_writev fs/read_write.c:1109 [inline]
__se_sys_writev fs/read_write.c:1106 [inline]
__x64_sys_writev+0x75/0xb0 fs/read_write.c:1106
do_syscall_64+0x103/0x610 arch/x86/entry/common.c:290
entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x457ce1
Code: 75 14 b8 14 00 00 00 0f 05 48 3d 01 f0 ff ff 0f 83 e4 b9 fb ff c3 48 83 ec 08 e8 1a 2d 00 00 48 89 04 24 b8 14 00 00 00 0f 05 <48> 8b 3c 24 48 89 c2 e8 63 2d 00 00 48 89 d0 48 83 c4 08 48 3d 01
RSP: 002b:00007f2bbaa4eba0 EFLAGS: 00000293 ORIG_RAX: 0000000000000014
RAX: ffffffffffffffda RBX: 0000000000000032 RCX: 0000000000457ce1
RDX: 0000000000000001 RSI: 00007f2bbaa4ebf0 RDI: 00000000000000f0
RBP: 0000000020000000 R08: 00000000000000f0 R09: 0000000000000000
R10: 00007f2bbaa4f9d0 R11: 0000000000000293 R12: 00007f2bbaa4f6d4
R13: 00000000004c6477 R14: 00000000004db8c0 R15: 00000000ffffffff
rcu: INFO: rcu_preempt detected expedited stalls on CPUs/tasks: { 1-... } 11007 jiffies s: 5905 root: 0x2/.
rcu: blocking rcu_node structures:
Task dump for CPU 1:
syz-executor.5 R running task 27360 12243 7780 0x8000000e
Call Trace:
entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x457ce1
Code: Bad RIP value.
RSP: 002b:00007f2bbaa4eba0 EFLAGS: 00000293 ORIG_RAX: 0000000000000014
RAX: ffffffffffffffda RBX: 0000000000000032 RCX: 0000000000457ce1
RDX: 0000000000000001 RSI: 00007f2bbaa4ebf0 RDI: 00000000000000f0
RBP: 0000000020000000 R08: 00000000000000f0 R09: 0000000000000000
R10: 00007f2bbaa4f9d0 R11: 0000000000000293 R12: 00007f2bbaa4f6d4
R13: 00000000004c6477 R14: 00000000004db8c0 R15: 00000000ffffffff