rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: 	0-....: (1 GPs behind) idle=a8f/1/0x4000000000000002 softirq=31410/31411 fqs=2095 
	(detected by 1, t=10502 jiffies, g=45545, q=1455)
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 PID: 11932 Comm: syz.8.1971 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/25/2025
RIP: 0010:unwind_next_frame+0x2c0/0x1d90 arch/x86/kernel/unwind_orc.c:-1
Code: fc 1c 1a 74 8d 0f 83 eb 12 00 00 48 c7 c0 1c 1a 74 8d 49 29 c7 48 c7 c6 1c bd dd 8d 49 c1 ff 02 4b 8d 14 7f 48 01 d2 48 01 f2 <49> bd 00 00 00 00 00 fc ff df 0f 85 ea 00 00 00 e9 c2 00 00 00 48
RSP: 0018:ffffc90000006c00 EFLAGS: 00000082
RAX: ffffffff8d7c9924 RBX: ffffc90000006d80 RCX: ffffffff8d7c992c
RDX: ffffffff8dea7bae RSI: ffffffff8dea7b78 RDI: 0000000000000001
RBP: ffffffff8196e0f2 R08: 000000000000000c R09: ffffc90000006dd0
R10: fffff52000000dbc R11: 1ffff92000000dba R12: ffffffff8d7c9928
R13: ffffffff8d7c992c R14: ffffffff8d7c9928 R15: 0000000000000009
FS:  00007fa894ab56c0(0000) GS:ffff8880b9000000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000100000000 CR3: 0000000064a34000 CR4: 00000000003506f0
DR0: 0000200000000300 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600
Call Trace:
 <IRQ>
 __unwind_start+0x5bb/0x740 arch/x86/kernel/unwind_orc.c:704
 unwind_start arch/x86/include/asm/unwind.h:60 [inline]
 perf_callchain_kernel+0x2be/0x6d0 arch/x86/events/core.c:-1
 get_perf_callchain+0x376/0x480 kernel/events/callchain.c:200
 perf_callchain kernel/events/core.c:7606 [inline]
 perf_prepare_sample+0x352/0x1cb0 kernel/events/core.c:7633
 __perf_event_output kernel/events/core.c:7802 [inline]
 perf_event_output_forward+0x146/0x280 kernel/events/core.c:7822
 __perf_event_overflow+0x364/0x530 kernel/events/core.c:9515
 perf_tp_event+0x32c/0xb50 kernel/events/core.c:10047
 perf_trace_run_bpf_submit+0xf3/0x1c0 kernel/events/core.c:10021
 perf_trace_preemptirq_template+0x2be/0x380 include/trace/events/preemptirq.h:14
 trace_irq_enable_rcuidle+0x108/0x180 include/trace/events/preemptirq.h:40
 trace_hardirqs_on+0x57/0x80 kernel/trace/trace_preemptirq.c:44
 asm_sysvec_irq_work+0x16/0x20 arch/x86/include/asm/idtentry.h:713
RIP: 0010:rcu_read_unlock_special+0x84/0x480 kernel/rcu/tree_plugin.h:674
Code: f1 f1 f1 00 f2 f2 f2 4a 89 04 2b 66 42 c7 44 2b 09 f3 f3 42 c6 44 2b 0b f3 65 44 8b 35 ed 11 9e 7e 41 f7 c6 00 00 f0 00 74 45 <48> c7 44 24 20 0e 36 e0 45 4a c7 04 2b 00 00 00 00 66 42 c7 44 2b
RSP: 0018:ffffc900000076a0 EFLAGS: 00000206
RAX: 54c3c5fe1a457e00 RBX: 1ffff92000000ed8 RCX: 54c3c5fe1a457e00
RDX: dffffc0000000000 RSI: ffffffff8a0b1be0 RDI: ffffffff8a59e800
RBP: ffffc90000007770 R08: dffffc0000000000 R09: fffffbfff1ff542c
R10: fffffbfff1ff542c R11: 1ffffffff1ff542b R12: ffffffff8c120c00
R13: dffffc0000000000 R14: 0000000000000246 R15: 0000000000000001
 __rcu_read_unlock+0x78/0xd0 kernel/rcu/tree_plugin.h:422
 rcu_read_unlock+0x85/0x90 include/linux/rcupdate.h:772
 icmp6_send+0x1147/0x16e0 net/ipv6/icmp.c:633
 __icmpv6_send include/linux/icmpv6.h:28 [inline]
 icmpv6_send include/linux/icmpv6.h:49 [inline]
 ip6_link_failure+0x35/0x490 net/ipv6/route.c:2788
 dst_link_failure include/net/dst.h:422 [inline]
 ndisc_error_report+0x10e/0x150 net/ipv6/ndisc.c:717
 neigh_invalidate+0x22c/0x440 net/core/neighbour.c:1001
 neigh_timer_handler+0x910/0xfe0 net/core/neighbour.c:1088
 call_timer_fn+0x16c/0x530 kernel/time/timer.c:1451
 expire_timers kernel/time/timer.c:1496 [inline]
 __run_timers+0x525/0x7c0 kernel/time/timer.c:1767
 run_timer_softirq+0x63/0xf0 kernel/time/timer.c:1780
 handle_softirqs+0x328/0x820 kernel/softirq.c:576
 __do_softirq kernel/softirq.c:610 [inline]
 invoke_softirq kernel/softirq.c:450 [inline]
 __irq_exit_rcu+0x12f/0x220 kernel/softirq.c:659
 irq_exit_rcu+0x5/0x20 kernel/softirq.c:671
 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1108 [inline]
 sysvec_apic_timer_interrupt+0xa0/0xc0 arch/x86/kernel/apic/apic.c:1108
 </IRQ>
 <TASK>
 asm_sysvec_apic_timer_interrupt+0x16/0x20 arch/x86/include/asm/idtentry.h:676
RIP: 0010:__raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:161 [inline]
RIP: 0010:_raw_spin_unlock_irqrestore+0xa5/0x100 kernel/locking/spinlock.c:194
Code: 74 05 e8 be 9a d2 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 <e8> d6 22 a6 f7 65 8b 05 67 20 57 76 85 c0 74 3c 48 c7 04 24 0e 36
RSP: 0018:ffffc900014efa60 EFLAGS: 00000206
RAX: 54c3c5fe1a457e00 RBX: 0000000000000a02 RCX: 54c3c5fe1a457e00
RDX: dffffc0000000000 RSI: ffffffff8a0b1be0 RDI: 0000000000000001
RBP: ffffc900014efae0 R08: dffffc0000000000 R09: ffffed1017207662
R10: ffffed1017207662 R11: 1ffff11017207661 R12: dffffc0000000000
R13: ffff888058ad3b80 R14: ffff888058ad4590 R15: 1ffff9200029df4c
 try_to_wake_up+0x69d/0x1050 kernel/sched/core.c:4167
 wake_up_process kernel/sched/core.c:4234 [inline]
 wake_up_q+0x78/0xc0 kernel/sched/core.c:953
 futex_wake+0x49f/0x530 kernel/futex/core.c:1702
 do_futex+0xcde/0x1240 kernel/futex/core.c:3987
 __do_sys_futex kernel/futex/core.c:4059 [inline]
 __se_sys_futex+0x3a3/0x430 kernel/futex/core.c:4040
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x66/0xd0
RIP: 0033:0x7fa89684e749
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:00007fa894ab50e8 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca
RAX: ffffffffffffffda RBX: 00007fa896aa4fa8 RCX: 00007fa89684e749
RDX: 00000000000f4240 RSI: 0000000000000081 RDI: 00007fa896aa4fac
RBP: 00007fa896aa4fa0 R08: 0021f490022d763c R09: 0000000000000000
R10: ffffffffffffffff R11: 0000000000000246 R12: 0000000000000000
R13: 00007fa896aa5038 R14: 00007ffe81045030 R15: 00007ffe81045118
 </TASK>