rcu: INFO: rcu_preempt self-detected stall on CPU
rcu: 	1-....: (10498 ticks this GP) idle=0234/1/0x4000000000000000 softirq=21929/21929 fqs=4438
rcu: 	         hardirqs   softirqs   csw/system
rcu: 	 number:  1371318          0            0
rcu: 	cputime:    17003      35485           68   ==> 52500(ms)
rcu: 	(t=10501 jiffies g=20613 q=1839 ncpus=2)
CPU: 1 PID: 6663 Comm: syz.3.20 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/18/2026
RIP: 0010:unwind_next_frame+0x742/0x2970 arch/x86/kernel/unwind_orc.c:515
Code: 0f b6 04 28 84 c0 0f 85 55 1c 00 00 48 8b 44 24 08 88 18 45 0f b7 37 41 83 e6 0f 4c 89 f7 48 c7 c6 e0 07 fa 8c e8 be e7 4b 00 <41> 83 fe 05 7f 7b 41 83 fe 03 48 8b 5c 24 30 0f 8f e3 00 00 00 41
RSP: 0018:ffffc900001effb8 EFLAGS: 00000246
RAX: 0000000000000008 RBX: 0000000000000000 RCX: 0000000000000003
RDX: ffffffff813b3f02 RSI: ffffffff8cfa07e0 RDI: 0000000000000004
RBP: ffffc900001f00d8 R08: ffff88802b9e0000 R09: 0000000000000008
R10: 0000000000000009 R11: 0000000000000100 R12: ffffc900001f0088
R13: dffffc0000000000 R14: 0000000000000004 R15: ffffffff8f0e84a6
FS:  00007f672a0eb6c0(0000) GS:ffff8880b8f00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b2d563fff CR3: 00000000600df000 CR4: 00000000003506e0
Call Trace:
 <IRQ>
 arch_stack_walk+0x144/0x190 arch/x86/kernel/stacktrace.c:25
 stack_trace_save+0xaa/0x100 kernel/stacktrace.c:122
 kasan_save_stack+0x3e/0x60 mm/kasan/common.c:46
 __kasan_record_aux_stack+0xaf/0xc0 mm/kasan/generic.c:492
 __call_rcu_common kernel/rcu/tree.c:2721 [inline]
 call_rcu+0x153/0x950 kernel/rcu/tree.c:2837
 refdst_drop include/net/dst.h:270 [inline]
 skb_dst_drop include/net/dst.h:282 [inline]
 __dev_queue_xmit+0x97a/0x3660 net/core/dev.c:4405
 neigh_output include/net/neighbour.h:543 [inline]
 ip6_finish_output2+0xe3d/0x1630 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+0xc26/0x14f0 net/ipv6/ndisc.c:513
 addrconf_rs_timer+0x2d5/0x630 net/ipv6/addrconf.c:4024
 call_timer_fn+0x189/0x540 kernel/time/timer.c:1701
 expire_timers kernel/time/timer.c:1752 [inline]
 __run_timers+0x542/0x800 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+0xd3/0x190 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
 </IRQ>
 <TASK>
 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:687
RIP: 0010:schedule_debug kernel/sched/core.c:5938 [inline]
RIP: 0010:__schedule+0x149/0x45a0 kernel/sched/core.c:6591
Code: e8 03 42 80 3c 30 00 74 08 48 89 df e8 d0 12 51 f7 48 8b 1b 48 89 d8 48 c1 e8 03 42 80 3c 30 00 74 08 48 89 df e8 b7 12 51 f7 <48> 81 3b 9d 6e ac 57 0f 85 7d 16 00 00 45 85 ff 44 89 7c 24 6c 75
RSP: 0018:ffffc900035777c0 EFLAGS: 00000246
RAX: 1ffff920006ae000 RBX: ffffc90003570000 RCX: 0000000000000000
RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffffc90003577960
RBP: ffffc900035779d0 R08: ffffc9000357795f R09: 0000000000000000
R10: ffffc90003577950 R11: fffff520006aef2c R12: 1ffff920006aef18
R13: ffff8880b8f00000 R14: dffffc0000000000 R15: 0000000000000001
 preempt_schedule_common+0x82/0xc0 kernel/sched/core.c:6867
 preempt_schedule+0xc0/0xd0 kernel/sched/core.c:6891
 preempt_schedule_thunk+0x1a/0x30 arch/x86/entry/thunk_64.S:45
 smp_call_function_single+0x48d/0x5a0 kernel/smp.c:652
 task_function_call kernel/events/core.c:120 [inline]
 perf_install_in_context+0x5be/0x920 kernel/events/core.c:2959
 __do_sys_perf_event_open kernel/events/core.c:12957 [inline]
 __se_sys_perf_event_open+0x1836/0x1c50 kernel/events/core.c:12609
 do_syscall_x64 arch/x86/entry/common.c:46 [inline]
 do_syscall_64+0x55/0xa0 arch/x86/entry/common.c:76
 entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7f672919c819
Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 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 e8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f672a0eb028 EFLAGS: 00000246 ORIG_RAX: 000000000000012a
RAX: ffffffffffffffda RBX: 00007f6729415fa0 RCX: 00007f672919c819
RDX: ffffffffffffffff RSI: 0000000000000000 RDI: 0000200000000140
RBP: 00007f6729232c91 R08: 0000000000000002 R09: 0000000000000000
R10: ffffffffffffffff R11: 0000000000000246 R12: 0000000000000000
R13: 00007f6729416038 R14: 00007f6729415fa0 R15: 00007ffde10014b8
 </TASK>