rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: 0-...!: (1 ticks this GP) idle=36ec/1/0x4000000000000000 softirq=37803/37803 fqs=1
rcu: (detected by 1, t=10504 jiffies, g=61589, q=402 ncpus=2)
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 PID: 5169 Comm: kworker/0:6 Not tainted 6.9.0-rc5-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/27/2024
Workqueue: events_power_efficient neigh_periodic_work
RIP: 0010:hlock_class+0x56/0x130 kernel/locking/lockdep.c:228
Code: 20 66 81 e3 ff 1f 0f b7 db be 08 00 00 00 48 89 d8 48 c1 e8 06 48 8d 3c c5 80 81 dd 93 e8 92 fd 7d 00 48 0f a3 1d 5a 8c 72 12 <73> 13 48 69 c3 c8 00 00 00 5b 48 05 a0 85 dd 93 c3 cc cc cc cc 48
RSP: 0018:ffffc900000079d0 EFLAGS: 00000047
RAX: 0000000000000001 RBX: 0000000000000d88 RCX: ffffffff816af51e
RDX: fffffbfff27bb067 RSI: 0000000000000008 RDI: ffffffff93dd8330
RBP: ffffc90000007b20 R08: 0000000000000000 R09: fffffbfff27bb066
R10: ffffffff93dd8337 R11: 0000000000000004 R12: ffff8880294e0000
R13: 0000000000000001 R14: 0000000000000000 R15: 1ffff92000000f42
FS: 0000000000000000(0000) GS:ffff8880b9400000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000020001bc0 CR3: 0000000067dc4000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
mark_lock+0xb5/0xc60 kernel/locking/lockdep.c:4656
mark_usage kernel/locking/lockdep.c:4564 [inline]
__lock_acquire+0x1359/0x3b30 kernel/locking/lockdep.c:5091
lock_acquire kernel/locking/lockdep.c:5754 [inline]
lock_acquire+0x1b1/0x560 kernel/locking/lockdep.c:5719
__raw_spin_lock include/linux/spinlock_api_smp.h:133 [inline]
_raw_spin_lock+0x2e/0x40 kernel/locking/spinlock.c:154
spin_lock include/linux/spinlock.h:351 [inline]
advance_sched+0xd8/0xc60 net/sched/sch_taprio.c:924
__run_hrtimer kernel/time/hrtimer.c:1692 [inline]
__hrtimer_run_queues+0x20c/0xcc0 kernel/time/hrtimer.c:1756
hrtimer_interrupt+0x31b/0x800 kernel/time/hrtimer.c:1818
local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1032 [inline]
__sysvec_apic_timer_interrupt+0x10f/0x450 arch/x86/kernel/apic/apic.c:1049
instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1043 [inline]
sysvec_apic_timer_interrupt+0x90/0xb0 arch/x86/kernel/apic/apic.c:1043
asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702
RIP: 0010:stack_access_ok+0x1f9/0x270 arch/x86/kernel/unwind_orc.c:394
Code: fd 0f 83 d3 fe ff ff e8 25 ac 50 00 48 8b 44 24 08 48 01 e8 49 39 c6 48 89 04 24 0f 83 b9 fe ff ff e8 0b ac 50 00 48 8b 04 24 <41> be 01 00 00 00 49 39 c7 0f 83 ec fe ff ff e9 9c fe ff ff 48 89
RSP: 0018:ffffc9000397f688 EFLAGS: 00000293
RAX: ffffc9000397ff30 RBX: ffffc9000397f750 RCX: ffffffff813d14e6
RDX: ffff8880294e0000 RSI: ffffffff813d1645 RDI: 0000000000000005
RBP: ffffc9000397ff28 R08: 0000000000000005 R09: 0000000000000000
R10: 0000000000000001 R11: 0000000000000003 R12: ffffc9000397f758
R13: ffffc9000397f760 R14: ffffc90003978000 R15: ffffc90003980000
deref_stack_reg arch/x86/kernel/unwind_orc.c:403 [inline]
unwind_next_frame+0xd9b/0x23a0 arch/x86/kernel/unwind_orc.c:585
arch_stack_walk+0x100/0x170 arch/x86/kernel/stacktrace.c:25
stack_trace_save+0x95/0xd0 kernel/stacktrace.c:122
kasan_save_stack+0x33/0x60 mm/kasan/common.c:47
__kasan_record_aux_stack+0xba/0xd0 mm/kasan/generic.c:541
kvfree_call_rcu+0x74/0xbe0 kernel/rcu/tree.c:3443
neigh_destroy+0x432/0x660 net/core/neighbour.c:918
neigh_release include/net/neighbour.h:445 [inline]
neigh_cleanup_and_release+0x20f/0x2d0 net/core/neighbour.c:103
neigh_periodic_work+0x6a7/0xc40 net/core/neighbour.c:1005
process_one_work+0x9a9/0x1ac0 kernel/workqueue.c:3254
process_scheduled_works kernel/workqueue.c:3335 [inline]
worker_thread+0x6c8/0xf70 kernel/workqueue.c:3416
kthread+0x2c1/0x3a0 kernel/kthread.c:388
ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:147
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244
rcu: rcu_preempt kthread starved for 10499 jiffies! g61589 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:27568 pid:16 tgid:16 ppid:2 flags:0x00004000
Call Trace:
context_switch kernel/sched/core.c:5409 [inline]
__schedule+0xf15/0x5d00 kernel/sched/core.c:6746
__schedule_loop kernel/sched/core.c:6823 [inline]
schedule+0xe7/0x350 kernel/sched/core.c:6838
schedule_timeout+0x136/0x2a0 kernel/time/timer.c:2582
rcu_gp_fqs_loop+0x1eb/0xb00 kernel/rcu/tree.c:1663
rcu_gp_kthread+0x271/0x380 kernel/rcu/tree.c:1862
kthread+0x2c1/0x3a0 kernel/kthread.c:388
ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:147
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244
rcu: Stack dump where RCU GP kthread last ran:
CPU: 1 PID: 61 Comm: kworker/u8:4 Not tainted 6.9.0-rc5-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/27/2024
Workqueue: wg-kex-wg0 wg_packet_handshake_send_worker
RIP: 0010:queued_write_lock_slowpath+0x176/0x330 kernel/locking/qrwlock.c:85
Code: 00 00 8b 03 3d 00 01 00 00 74 37 48 b8 00 00 00 00 00 fc ff df 48 89 d9 48 89 da 48 c1 e9 03 83 e2 07 48 01 c1 83 c2 03 f3 90 <0f> b6 01 38 c2 7c 08 84 c0 0f 85 5f 01 00 00 8b 03 3d 00 01 00 00
RSP: 0018:ffffc900015c74e8 EFLAGS: 00000206
RAX: 00000000000001ff RBX: ffffffff8f4dace0 RCX: fffffbfff1e9b59c
RDX: 0000000000000003 RSI: 0000000000000004 RDI: ffffffff8f4dace0
RBP: 1ffff920002b8e9f R08: 0000000000000001 R09: fffffbfff1e9b59c
R10: ffffffff8f4dace3 R11: 0000000000000005 R12: ffffffff8f4dace4
R13: 0000000000000003 R14: fffffbfff1e9b59c R15: ffffc900015c7528
FS: 0000000000000000(0000) GS:ffff8880b9500000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b2cf34000 CR3: 00000000248ba000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
queued_write_lock include/asm-generic/qrwlock.h:101 [inline]
do_raw_write_lock+0x1d4/0x3a0 kernel/locking/spinlock_debug.c:211
___neigh_create+0x9dd/0x2ae0 net/core/neighbour.c:682
ip6_finish_output2+0x112f/0x18b0 net/ipv6/ip6_output.c:128
__ip6_finish_output net/ipv6/ip6_output.c:211 [inline]
ip6_finish_output+0x3f9/0x1300 net/ipv6/ip6_output.c:222
NF_HOOK_COND include/linux/netfilter.h:303 [inline]
ip6_output+0x1eb/0x540 net/ipv6/ip6_output.c:243
dst_output include/net/dst.h:450 [inline]
ip6_local_out+0xcd/0x4a0 net/ipv6/output_core.c:155
ip6tunnel_xmit include/net/ip6_tunnel.h:161 [inline]
udp_tunnel6_xmit_skb+0x746/0xb80 net/ipv6/ip6_udp_tunnel.c:111
send6+0x4ac/0xd20 drivers/net/wireguard/socket.c:152
wg_socket_send_skb_to_peer+0xf9/0x220 drivers/net/wireguard/socket.c:178
wg_socket_send_buffer_to_peer+0x12b/0x190 drivers/net/wireguard/socket.c:200
wg_packet_send_handshake_initiation+0x227/0x360 drivers/net/wireguard/send.c:40
wg_packet_handshake_send_worker+0x1c/0x30 drivers/net/wireguard/send.c:51
process_one_work+0x9a9/0x1ac0 kernel/workqueue.c:3254
process_scheduled_works kernel/workqueue.c:3335 [inline]
worker_thread+0x6c8/0xf70 kernel/workqueue.c:3416
kthread+0x2c1/0x3a0 kernel/kthread.c:388
ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:147
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244