rcu: INFO: rcu_preempt detected expedited stalls on CPUs/tasks: { 0-.... } 2676 jiffies s: 8481 root: 0x1/.
rcu: blocking rcu_node structures (internal RCU debug):
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 PID: 6767 Comm: syz.0.573 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/18/2025
RIP: 0010:preempt_count arch/x86/include/asm/preempt.h:27 [inline]
RIP: 0010:check_kcov_mode kernel/kcov.c:182 [inline]
RIP: 0010:__sanitizer_cov_trace_pc+0xc/0x60 kernel/kcov.c:216
Code: 89 fb e8 17 00 00 00 48 8b 3d d0 a6 9e 0c 48 89 de 5b e9 37 58 4f 00 00 00 cc cc 00 00 cc 48 8b 04 24 65 48 8b 0d a4 9e 81 7e <65> 8b 15 a5 9e 81 7e 81 e2 00 01 ff 00 74 11 81 fa 00 01 00 00 75
RSP: 0018:ffffc900000073e0 EFLAGS: 00000006
RAX: ffffffff81a3bd46 RBX: 0000000000000006 RCX: ffff88807c648000
RDX: 0000000000000100 RSI: 0000000000000006 RDI: 0000000000000001
RBP: ffff8880b8e35518 R08: dffffc0000000000 R09: ffffed100f8c9001
R10: ffffed100f8c9001 R11: 1ffff1100f8c9000 R12: 0000000000000001
R13: ffff88802fd3c9f0 R14: 1ffff11005fa793e R15: 0000000000000006
FS:  00007f1819cd76c0(0000) GS:ffff8880b8e00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f0d273c7dac CR3: 000000005ced4000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <IRQ>
 perf_swevent_event+0x306/0x530 kernel/events/core.c:9604
 perf_tp_event+0x335/0xb60 kernel/events/core.c:10029
 perf_trace_run_bpf_submit+0xf3/0x1c0 kernel/events/core.c:10002
 perf_trace_preemptirq_template+0x287/0x330 include/trace/events/preemptirq.h:14
 trace_irq_enable_rcuidle+0xd3/0x140 include/trace/events/preemptirq.h:40
 trace_hardirqs_on+0x24/0x40 kernel/trace/trace_preemptirq.c:44
 asm_sysvec_irq_work+0x16/0x20 arch/x86/include/asm/idtentry.h:728
RIP: 0010:rcu_read_unlock_special+0x84/0x500 kernel/rcu/tree_plugin.h:685
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 2d 97 96 7e 41 f7 c6 00 00 f0 00 74 45 <48> c7 44 24 40 0e 36 e0 45 4a c7 04 2b 00 00 00 00 66 42 c7 44 2b
RSP: 0018:ffffc900000078e0 EFLAGS: 00000206
RAX: 882b331ba6711100 RBX: 1ffff92000000f24 RCX: 882b331ba6711100
RDX: dffffc0000000000 RSI: ffffffff8a8c0500 RDI: ffffffff8adefca0
RBP: ffffc900000079d0 R08: dffffc0000000000 R09: fffffbfff215c469
R10: fffffbfff215c469 R11: 1ffffffff215c468 R12: 0000000000000246
R13: dffffc0000000000 R14: ffff8880b8e3b901 R15: ffff88807c648000
 __rcu_read_unlock+0x78/0xd0 kernel/rcu/tree_plugin.h:426
 rcu_read_unlock include/linux/rcupdate.h:823 [inline]
 ndisc_alloc_skb+0x357/0x450 net/ipv6/ndisc.c:438
 ndisc_send_rs+0x2a2/0x610 net/ipv6/ndisc.c:707
 addrconf_rs_timer+0x2b8/0x600 net/ipv6/addrconf.c:3979
 call_timer_fn+0x1a0/0x670 kernel/time/timer.c:1504
 expire_timers kernel/time/timer.c:1549 [inline]
 __run_timers+0x525/0x7c0 kernel/time/timer.c:1820
 run_timer_softirq+0x63/0xf0 kernel/time/timer.c:1833
 handle_softirqs+0x2a1/0x920 kernel/softirq.c:596
 __do_softirq kernel/softirq.c:630 [inline]
 invoke_softirq kernel/softirq.c:470 [inline]
 __irq_exit_rcu+0x12f/0x220 kernel/softirq.c:679
 irq_exit_rcu+0x5/0x20 kernel/softirq.c:691
 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1118 [inline]
 sysvec_apic_timer_interrupt+0xa0/0xc0 arch/x86/kernel/apic/apic.c:1118
 </IRQ>
 <TASK>
 asm_sysvec_apic_timer_interrupt+0x16/0x20 arch/x86/include/asm/idtentry.h:691
RIP: 0010:generic_exec_single+0x41e/0x490 kernel/smp.c:545
Code: 75 11 e8 15 e8 0a 00 48 85 db 75 16 e8 0b e8 0a 00 eb 15 e8 04 e8 0a 00 e8 9f 5a a1 08 48 85 db 74 ea e8 f5 e7 0a 00 fb 31 c0 <48> c7 44 24 20 0e 36 e0 45 4b c7 44 25 00 00 00 00 00 66 43 c7 44
RSP: 0018:ffffc9000d927a60 EFLAGS: 00000246
RAX: 0000000000000000 RBX: 0000000000000200 RCX: ffff88807c648000
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: ffffc9000d927b30 R08: dffffc0000000000 R09: fffffbfff215c46d
R10: fffffbfff215c46d R11: 1ffffffff215c46c R12: dffffc0000000000
R13: 1ffff92001b24f50 R14: 0000000000000000 R15: 1ffff92001b24f71
 smp_call_function_single+0x34f/0x560 kernel/smp.c:784
 task_function_call kernel/events/core.c:120 [inline]
 perf_install_in_context+0x59a/0x8f0 kernel/events/core.c:2941
 __do_sys_perf_event_open kernel/events/core.c:12784 [inline]
 __se_sys_perf_event_open+0x1247/0x1e60 kernel/events/core.c:12378
 do_syscall_x64 arch/x86/entry/common.c:51 [inline]
 do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:81
 entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7f1818d8ebe9
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:00007f1819cd7038 EFLAGS: 00000246 ORIG_RAX: 000000000000012a
RAX: ffffffffffffffda RBX: 00007f1818fc5fa0 RCX: 00007f1818d8ebe9
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000200000000480
RBP: 00007f1818e11e19 R08: 0000000000000000 R09: 0000000000000000
R10: ffffffffffffffff R11: 0000000000000246 R12: 0000000000000000
R13: 00007f1818fc6038 R14: 00007f1818fc5fa0 R15: 00007ffda7833c58
 </TASK>