rcu: INFO: rcu_preempt self-detected stall on CPU rcu: 0-....: (10058 ticks this GP) idle=e05c/1/0x4000000000000000 softirq=21484/21484 fqs=4188 rcu: hardirqs softirqs csw/system rcu: number: 1368470 0 0 rcu: cputime: 17039 35450 59 ==> 52490(ms) rcu: (t=10500 jiffies g=24493 q=4386 ncpus=2) CPU: 0 PID: 8191 Comm: syz.2.680 Not tainted syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/25/2025 RIP: 0010:__raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:152 [inline] RIP: 0010:_raw_spin_unlock_irqrestore+0xa9/0x110 kernel/locking/spinlock.c:194 Code: 74 05 e8 0a d9 1a f7 48 c7 44 24 20 00 00 00 00 9c 8f 44 24 20 f6 44 24 21 02 75 4b f7 c3 00 02 00 00 74 01 fb bf 01 00 00 00 e2 53 ea f6 65 8b 05 d3 9a 92 75 85 c0 74 3c 48 c7 04 24 0e 36 RSP: 0018:ffffc90000006920 EFLAGS: 00000206 RAX: d76c424093a3e100 RBX: 0000000000000a06 RCX: d76c424093a3e100 RDX: dffffc0000000000 RSI: ffffffff8aaabce0 RDI: 0000000000000001 RBP: ffffc900000069b8 R08: ffffffff90d9458f R09: 1ffffffff21b28b1 R10: dffffc0000000000 R11: fffffbfff21b28b2 R12: dffffc0000000000 R13: ffff88803398c4d0 R14: ffffffff8d3eb7c0 R15: 1ffff92000000d24 FS: 00007f04ea7f66c0(0000) GS:ffff8880b8e00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000100000000 CR3: 000000002da1a000 CR4: 00000000003506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600 Call Trace: __stack_depot_save+0x560/0x630 lib/stackdepot.c:439 ref_tracker_alloc+0x18b/0x460 lib/ref_tracker.c:210 __netdev_tracker_alloc include/linux/netdevice.h:4110 [inline] netdev_hold include/linux/netdevice.h:4139 [inline] ___neigh_create+0xc8b/0x2440 net/core/neighbour.c:658 ip6_finish_output2+0x159e/0x1650 net/ipv6/ip6_output.c:132 ip6_send_skb+0x1d5/0x380 net/ipv6/ip6_output.c:2038 icmp6_send+0x12ec/0x1990 net/ipv6/icmp.c:632 __icmpv6_send include/linux/icmpv6.h:28 [inline] icmpv6_send include/linux/icmpv6.h:49 [inline] ip6_pkt_drop+0x4e5/0x640 net/ipv6/route.c:4564 ip6_pkt_discard_out+0xf2/0x110 net/ipv6/route.c:4577 ip6tunnel_xmit include/net/ip6_tunnel.h:161 [inline] udp_tunnel6_xmit_skb+0x5a4/0xa10 net/ipv6/ip6_udp_tunnel.c:109 geneve6_xmit_skb drivers/net/geneve.c:1088 [inline] geneve_xmit+0x22a0/0x3090 drivers/net/geneve.c:1117 __netdev_start_xmit include/linux/netdevice.h:4943 [inline] netdev_start_xmit include/linux/netdevice.h:4957 [inline] xmit_one net/core/dev.c:3619 [inline] dev_hard_start_xmit+0x246/0x740 net/core/dev.c:3635 __dev_queue_xmit+0x1a64/0x35a0 net/core/dev.c:4425 neigh_output include/net/neighbour.h:543 [inline] ip6_finish_output2+0xe2e/0x1650 net/ipv6/ip6_output.c:141 dst_output include/net/dst.h:467 [inline] NF_HOOK include/linux/netfilter.h:304 [inline] ndisc_send_skb+0xbed/0x14b0 net/ipv6/ndisc.c:513 addrconf_rs_timer+0x2bc/0x600 net/ipv6/addrconf.c:4006 call_timer_fn+0x16e/0x530 kernel/time/timer.c:1701 expire_timers kernel/time/timer.c:1752 [inline] __run_timers+0x52d/0x7d0 kernel/time/timer.c:2023 run_timer_softirq+0x67/0xf0 kernel/time/timer.c:2036 handle_softirqs+0x280/0x820 kernel/softirq.c:578 __do_softirq kernel/softirq.c:612 [inline] invoke_softirq kernel/softirq.c:452 [inline] __irq_exit_rcu+0xc7/0x190 kernel/softirq.c:661 irq_exit_rcu+0x9/0x20 kernel/softirq.c:673 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1088 [inline] sysvec_apic_timer_interrupt+0xa4/0xc0 arch/x86/kernel/apic/apic.c:1088 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:687 RIP: 0010:preempt_schedule_irq+0xb0/0x140 kernel/sched/core.c:7009 Code: 44 24 20 f6 44 24 21 02 74 0b 0f 0b 48 f7 03 08 00 00 00 74 63 bf 01 00 00 00 e8 8b b3 eb f6 e8 26 3a 1c f7 fb bf 01 00 00 00 db b5 ff ff 48 c7 44 24 40 00 00 00 00 9c 8f 44 24 40 8b 44 24 RSP: 0018:ffffc90004abfb20 EFLAGS: 00000282 RAX: d76c424093a3e100 RBX: 0000000000000000 RCX: d76c424093a3e100 RDX: dffffc0000000000 RSI: ffffffff8aaabce0 RDI: 0000000000000001 RBP: ffffc90004abfbc0 R08: ffffffff90d945ff R09: 1ffffffff21b28bf R10: dffffc0000000000 R11: fffffbfff21b28c0 R12: 0000000000000000 R13: 0000000000000000 R14: dffffc0000000000 R15: 1ffff92000957f64 irqentry_exit+0x67/0x70 kernel/entry/common.c:438 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:687 RIP: 0010:_raw_spin_lock_irqsave+0x30/0xf0 kernel/locking/spinlock.c:161 Code: 89 e5 41 57 41 56 41 54 53 48 83 e4 e0 48 83 ec 60 48 89 fb 65 48 8b 04 25 28 00 00 00 48 89 44 24 48 48 c7 04 24 b3 8a b5 41 <48> c7 44 24 08 a0 4f 65 8c 48 c7 44 24 10 e0 17 71 8a 49 89 e7 49 RSP: 0018:ffffc90004abfc80 EFLAGS: 00000282 RAX: d76c424093a3e100 RBX: ffff888026c96c00 RCX: 0000000000080000 RDX: ffffc9000d81a000 RSI: 0000000000007705 RDI: ffff888026c96c00 RBP: ffffc90004abfd18 R08: ffffffff90d945ff R09: 1ffffffff21b28bf R10: dffffc0000000000 R11: fffffbfff21b28c0 R12: 0000000000000000 R13: 1ffff92000957fb8 R14: ffff888078c10848 R15: ffff888022468000 perf_unpin_context+0x13/0x70 kernel/events/core.c:1472 __do_sys_perf_event_open kernel/events/core.c:12916 [inline] __se_sys_perf_event_open+0x1802/0x1c20 kernel/events/core.c:12567 do_syscall_x64 arch/x86/entry/common.c:51 [inline] do_syscall_64+0x55/0xb0 arch/x86/entry/common.c:81 entry_SYSCALL_64_after_hwframe+0x68/0xd2 RIP: 0033:0x7f04ec58f749 Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 a8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f04ea7f6038 EFLAGS: 00000246 ORIG_RAX: 000000000000012a RAX: ffffffffffffffda RBX: 00007f04ec7e5fa0 RCX: 00007f04ec58f749 RDX: ffffffffffffffff RSI: 0000000000000000 RDI: 0000200000000480 RBP: 00007f04ec613f91 R08: 0000000000000000 R09: 0000000000000000 R10: ffffffffffffffff R11: 0000000000000246 R12: 0000000000000000 R13: 00007f04ec7e6038 R14: 00007f04ec7e5fa0 R15: 00007fff575effe8