rcu: INFO: rcu_preempt self-detected stall on CPU
rcu: 	0-....: (10499 ticks this GP) idle=c1cc/1/0x4000000000000000 softirq=10903/10903 fqs=4548
rcu: 	         hardirqs   softirqs   csw/system
rcu: 	 number:  1229904          0            0
rcu: 	cputime:    18085      34394           66   ==> 52480(ms)
rcu: 	(t=10500 jiffies g=10069 q=1982 ncpus=2)
CPU: 0 PID: 5844 Comm: syz.3.4 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2026
RIP: 0010:unwind_next_frame+0x13c/0x2970 arch/x86/kernel/unwind_orc.c:494
Code: 83 e3 03 74 1b e8 24 e5 4b 00 e9 f7 20 00 00 e8 1a e5 4b 00 e9 26 21 00 00 e8 10 e5 4b 00 eb 05 e8 09 e5 4b 00 4c 89 7c 24 78 <4d> 8d 74 24 35 4c 89 f0 48 c1 e8 03 48 89 44 24 38 42 0f b6 04 28
RSP: 0018:ffffc90000006fb8 EFLAGS: 00000246
RAX: ffffffff813b3750 RBX: 1ffff92000000e11 RCX: ffff8880316e1e00
RDX: 0000000000000100 RSI: 0000000000000001 RDI: 0000000000000001
RBP: ffffc900000070d8 R08: ffffc90000007150 R09: 0000000000000012
R10: 0000000000000004 R11: 0000000000000100 R12: ffffc90000007088
R13: dffffc0000000000 R14: 0000000000000000 R15: ffffffff81af1db6
FS:  00007f7fbd5246c0(0000) GS:ffff8880b8e00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000100000000 CR3: 000000005d5c0000 CR4: 00000000003506f0
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:4393
 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:preempt_count_sub+0x65/0x160 kernel/sched/core.c:5885
Code: ff ff ff 7f 39 cf 7f 25 81 ff ff 00 00 00 0f 93 c1 84 c0 0f 95 c0 08 c8 74 53 65 8b 05 cc 2e a7 7e f7 df 65 01 3d c3 2e a7 7e <5b> 5d c3 e8 43 b3 c9 02 85 c0 74 f4 48 c7 c0 b0 23 8b 8e 48 c1 e8
RSP: 0018:ffffc900048bfac8 EFLAGS: 00000297
RAX: 0000000080000001 RBX: dffffc0000000000 RCX: 0000000000000000
RDX: ffffc9000dc0b000 RSI: 00000000000152a4 RDI: 00000000ffffffff
RBP: ffffc900048bfbd0 R08: ffffffff911c15ff R09: 1ffffffff22382bf
R10: dffffc0000000000 R11: fffffbfff22382c0 R12: 0000000000000000
R13: dffffc0000000000 R14: 1ffff92000917f60 R15: 1ffff92000917f60
 smp_call_function_single+0x406/0x5a0 kernel/smp.c:652
 task_function_call kernel/events/core.c:120 [inline]
 perf_install_in_context+0x5be/0x920 kernel/events/core.c:2948
 __do_sys_perf_event_open kernel/events/core.c:12915 [inline]
 __se_sys_perf_event_open+0x1836/0x1c50 kernel/events/core.c:12567
 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: 0033:0x7f7fbc59c799
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:00007f7fbd524028 EFLAGS: 00000246 ORIG_RAX: 000000000000012a
RAX: ffffffffffffffda RBX: 00007f7fbc815fa0 RCX: 00007f7fbc59c799
RDX: ffffffffffffffff RSI: 0000000000000000 RDI: 0000200000000480
RBP: 00007f7fbc632c99 R08: 000000000000000a R09: 0000000000000000
R10: ffffffffffffffff R11: 0000000000000246 R12: 0000000000000000
R13: 00007f7fbc816038 R14: 00007f7fbc815fa0 R15: 00007ffc8f0c7828
 </TASK>