rcu: INFO: rcu_preempt detected expedited stalls on CPUs/tasks: { 1-.... } 2675 jiffies s: 186221 root: 0x2/.
rcu: blocking rcu_node structures (internal RCU debug):
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 PID: 8027 Comm: syz.3.12087 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/24/2026
RIP: 0010:mark_held_locks kernel/locking/lockdep.c:4223 [inline]
RIP: 0010:__trace_hardirqs_on_caller kernel/locking/lockdep.c:4253 [inline]
RIP: 0010:lockdep_hardirqs_on_prepare+0x255/0x7c0 kernel/locking/lockdep.c:4320
Code: 00 48 89 df 4c 89 fe e8 d9 ed 00 00 48 8d b3 d8 0a 00 00 48 ba 00 00 00 00 00 fc ff df 85 c0 0f 84 ec 01 00 00 41 0f b6 04 16 <84> c0 75 6c 49 ff c5 48 63 06 49 83 c7 28 49 83 c4 28 49 39 c5 7c
RSP: 0018:ffffc900001e0540 EFLAGS: 00000002
RAX: 0000000000000000 RBX: ffff88802bc1bc00 RCX: ffffffff8164b4a4
RDX: dffffc0000000000 RSI: ffff88802bc1c6d8 RDI: ffffffff90b0f240
RBP: ffffc900001e0600 R08: ffffffff90b0f247 R09: 1ffffffff2161e48
R10: dffffc0000000000 R11: fffffbfff2161e49 R12: ffff88802bc1c7c8
R13: 0000000000000005 R14: 1ffff110057838db R15: ffff88802bc1c7a8
FS:  00007f2442d066c0(0000) GS:ffff8880b8f00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b31e15ff8 CR3: 000000007a4b7000 CR4: 00000000003506e0
Call Trace:
 <IRQ>
 trace_hardirqs_on+0x34/0x40 kernel/trace/trace_preemptirq.c:49
 asm_sysvec_irq_work+0x16/0x20 arch/x86/include/asm/idtentry.h:728
RIP: 0010:rcu_read_unlock_special+0x7f/0x510 kernel/rcu/tree_plugin.h:685
Code: eb 03 48 b8 f1 f1 f1 f1 f8 f2 f2 f2 4a 89 04 2b 42 c7 44 2b 08 f8 f3 f3 f3 65 44 8b 35 32 7b 95 7e 41 f7 c6 00 00 f0 00 74 40 <48> c7 44 24 40 0e 36 e0 45 4a c7 04 2b 00 00 00 00 42 c7 44 2b 08
RSP: 0018:ffffc900001e06c0 EFLAGS: 00000206
RAX: 2b99960f41889300 RBX: 1ffff9200003c0e0 RCX: 2b99960f41889300
RDX: dffffc0000000000 RSI: ffffffff8a8c18a0 RDI: ffffffff8adf68a0
RBP: ffffc900001e07c0 R08: ffffffff90b0f30f R09: 1ffffffff2161e61
R10: dffffc0000000000 R11: fffffbfff2161e62 R12: 0000000000000246
R13: dffffc0000000000 R14: ffff8880b8f3bb00 R15: 0000000000000002
 __rcu_read_unlock+0x78/0xd0 kernel/rcu/tree_plugin.h:426
 rcu_read_unlock include/linux/rcupdate.h:823 [inline]
 ndisc_send_skb+0xdc2/0x1520 net/ipv6/ndisc.c:521
 ndisc_send_ns net/ipv6/ndisc.c:671 [inline]
 ndisc_solicit+0x36b/0x660 net/ipv6/ndisc.c:763
 neigh_probe net/core/neighbour.c:1080 [inline]
 neigh_timer_handler+0xaba/0x1090 net/core/neighbour.c:1162
 call_timer_fn+0x1ac/0x670 kernel/time/timer.c:1701
 expire_timers kernel/time/timer.c:1752 [inline]
 __run_timers+0x56c/0x810 kernel/time/timer.c:2023
 run_timer_softirq+0x63/0xf0 kernel/time/timer.c:2036
 handle_softirqs+0x291/0x910 kernel/softirq.c:596
 __do_softirq kernel/softirq.c:630 [inline]
 invoke_softirq kernel/softirq.c:470 [inline]
 __irq_exit_rcu+0x13b/0x230 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:get_current arch/x86/include/asm/current.h:15 [inline]
RIP: 0010:write_comp_data kernel/kcov.c:240 [inline]
RIP: 0010:__sanitizer_cov_trace_const_cmp4+0x4/0x80 kernel/kcov.c:309
Code: 77 22 89 ff 89 f6 49 ff c0 4c 89 01 48 c7 44 11 08 03 00 00 00 48 89 7c 11 10 48 89 74 11 18 48 89 44 11 20 c3 90 48 8b 04 24 <65> 48 8b 15 f4 38 80 7e 65 8b 0d f5 38 80 7e 81 e1 00 01 ff 00 74
RSP: 0018:ffffc9000648f7f8 EFLAGS: 00000246
RAX: ffffffff8a268203 RBX: 1ffff92000c91f30 RCX: dffffc0000000000
RDX: ffffffff8108cff0 RSI: 0000000000000000 RDI: 0000000000000000
RBP: dffffc0000000000 R08: ffffc9000648f9b7 R09: ffffc9000648f960
R10: dffffc0000000000 R11: fffff52000c91f37 R12: ffffc9000648f985
R13: ffffc9000648f984 R14: ffffc9000648f960 R15: 0000000000004000
 insn_get_modrm+0x1c3/0x760 arch/x86/lib/insn.c:351
 insn_get_sib arch/x86/lib/insn.c:421 [inline]
 insn_get_displacement+0x146/0x9d0 arch/x86/lib/insn.c:464
 insn_get_immediate+0x2f8/0x11b0 arch/x86/lib/insn.c:632
 insn_get_length arch/x86/lib/insn.c:707 [inline]
 insn_decode+0x386/0x520 arch/x86/lib/insn.c:747
 arch_jump_entry_size arch/x86/kernel/jump_label.c:24 [inline]
 __jump_label_patch+0x105/0x450 arch/x86/kernel/jump_label.c:45
 arch_jump_label_transform_queue+0x48/0xd0 arch/x86/kernel/jump_label.c:137
 __jump_label_update+0x18a/0x3c0 kernel/jump_label.c:510
 static_key_enable_cpuslocked+0x11f/0x240 kernel/jump_label.c:207
 static_key_enable+0x16/0x20 kernel/jump_label.c:220
 tracepoint_add_func+0x985/0xa10 kernel/tracepoint.c:363
 tracepoint_probe_register_prio kernel/tracepoint.c:513 [inline]
 tracepoint_probe_register+0x5a/0x90 kernel/tracepoint.c:533
 perf_trace_event_reg kernel/trace/trace_event_perf.c:129 [inline]
 perf_trace_event_init+0x41e/0x940 kernel/trace/trace_event_perf.c:202
 perf_trace_init+0x234/0x2d0 kernel/trace/trace_event_perf.c:226
 perf_tp_event_init+0x89/0x110 kernel/events/core.c:10129
 perf_try_init_event+0x12b/0x3d0 kernel/events/core.c:11644
 perf_init_event kernel/events/core.c:11708 [inline]
 perf_event_alloc+0xea0/0x21e0 kernel/events/core.c:12000
 __do_sys_perf_event_open kernel/events/core.c:12536 [inline]
 __se_sys_perf_event_open+0x701/0x1ec0 kernel/events/core.c:12428
 do_syscall_x64 arch/x86/entry/common.c:46 [inline]
 do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:76
 entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7f2441d9e159
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:00007f2442d06028 EFLAGS: 00000246 ORIG_RAX: 000000000000012a
RAX: ffffffffffffffda RBX: 00007f2442026180 RCX: 00007f2441d9e159
RDX: ffffffefffffffff RSI: 0000000000000000 RDI: 0000200000000140
RBP: 00007f2441e3506b R08: 0000000000000008 R09: 0000000000000000
R10: ffffffffffffffff R11: 0000000000000246 R12: 0000000000000000
R13: 00007f2442026218 R14: 00007f2442026180 R15: 00007ffdeddfa968
 </TASK>