rcu: INFO: rcu_preempt self-detected stall on CPU
rcu: 	0-....: (10069 ticks this GP) idle=08e4/1/0x4000000000000000 softirq=70202/70203 fqs=4202
rcu: 	         hardirqs   softirqs   csw/system
rcu: 	 number:  1406815          0            0
rcu: 	cputime:    18238      34251           65   ==> 52490(ms)
rcu: 	(t=10500 jiffies g=92629 q=1859 ncpus=2)
CPU: 0 PID: 18935 Comm: syz.3.3597 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2026
RIP: 0010:check_kcov_mode kernel/kcov.c:182 [inline]
RIP: 0010:write_comp_data kernel/kcov.c:245 [inline]
RIP: 0010:__sanitizer_cov_trace_cmp4+0x17/0x90 kernel/kcov.c:287
Code: 48 89 44 11 20 c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 00 f3 0f 1e fa 48 8b 04 24 65 48 8b 15 60 92 7c 7e 65 8b 0d 61 92 7c 7e <81> e1 00 01 ff 00 74 11 81 f9 00 01 00 00 75 5b 83 ba 1c 16 00 00
RSP: 0018:ffffc90000006fb0 EFLAGS: 00000246
RAX: ffffffff813b5407 RBX: ffffc900000070c0 RCX: 0000000000000302
RDX: ffff888029400000 RSI: 0000000000000001 RDI: 0000000000000001
RBP: 0000000000000001 R08: ffff888029400000 R09: 0000000000000003
R10: 0000000000000004 R11: 0000000000000100 R12: ffffc90000007088
R13: dffffc0000000000 R14: 0000000000000001 R15: ffffc900000070c8
FS:  00007f77144806c0(0000) GS:ffff8880b8e00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000000000 CR3: 0000000075079000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600
Call Trace:
 <IRQ>
 unwind_next_frame+0x1c47/0x2970 arch/x86/kernel/unwind_orc.c:664
 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_schedule_irq+0xba/0x150 kernel/sched/core.c:7010
Code: 00 00 43 c6 44 37 04 f8 74 0b 0f 0b 48 f7 03 08 00 00 00 74 6f bf 01 00 00 00 e8 a1 1b ce f6 e8 cc 28 ff f6 fb bf 01 00 00 00 <e8> f1 b4 ff ff 43 c6 44 37 08 00 48 c7 44 24 40 00 00 00 00 9c 8f
RSP: 0018:ffffc90004a67a80 EFLAGS: 00000282
RAX: 0f246408a3edaa00 RBX: 0000000000000000 RCX: 0f246408a3edaa00
RDX: dffffc0000000000 RSI: ffffffff8acac9e0 RDI: 0000000000000001
RBP: ffffc90004a67b20 R08: ffffffff911c45ff R09: 1ffffffff22388bf
R10: dffffc0000000000 R11: fffffbfff22388c0 R12: 0000000000000000
R13: 0000000000000000 R14: dffffc0000000000 R15: 1ffff9200094cf50
 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:perf_install_in_context+0x764/0x920 kernel/events/core.c:2983
Code: 00 4b c7 44 27 08 00 00 00 00 43 c7 44 27 10 00 00 00 00 65 48 8b 04 25 28 00 00 00 48 3b 84 24 00 01 00 00 0f 85 4a 01 00 00 <48> 8d 65 d8 5b 41 5c 41 5d 41 5e 41 5f 5d c3 e8 78 b0 d7 ff e9 37
RSP: 0018:ffffc90004a67be0 EFLAGS: 00000246
RAX: 0f246408a3edaa00 RBX: 0000000000000000 RCX: 0000000000080000
RDX: ffffc90015cc9000 RSI: 000000000000d940 RDI: 000000000000d941
RBP: ffffc90004a67d30 R08: ffffffff911c45ff R09: 1ffffffff22388bf
R10: dffffc0000000000 R11: fffffbfff22388c0 R12: dffffc0000000000
R13: ffff888029400014 R14: ffffc90004a67c60 R15: 1ffff9200094cf88
 __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: 0033:0x7f771359c819
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:00007f7714480028 EFLAGS: 00000246 ORIG_RAX: 000000000000012a
RAX: ffffffffffffffda RBX: 00007f7713816090 RCX: 00007f771359c819
RDX: ffffffffffffffff RSI: 0000000000000000 RDI: 0000200000000140
RBP: 00007f7713632c91 R08: 0000000000000002 R09: 0000000000000000
R10: ffffffffffffffff R11: 0000000000000246 R12: 0000000000000000
R13: 00007f7713816128 R14: 00007f7713816090 R15: 00007ffc6479acf8
 </TASK>