rcu: INFO: rcu_preempt detected expedited stalls on CPUs/tasks: { 0-.... } 2627 jiffies s: 49641 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: 15937 Comm: syz.1.3531 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/24/2026
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_cmp8+0x4/0x80 kernel/kcov.c:316
Code: 77 22 89 ff 89 f6 49 ff c0 4c 89 01 48 c7 44 11 08 05 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 0d 74 38 80 7e 65 8b 15 75 38 80 7e 81 e2 00 01 ff 00 74
RSP: 0018:ffffc900000073b8 EFLAGS: 00000046
RAX: ffffffff81a4c4af RBX: ffffc90000007560 RCX: ffff888024a69e00
RDX: 0000000000000100 RSI: 0000000000000000 RDI: 0000000000000000
RBP: ffffc900000074b0 R08: ffffc90000007537 R09: ffffc90000007500
R10: dffffc0000000000 R11: fffff52000000ea7 R12: dffffc0000000000
R13: 0000000000000000 R14: 0000000000000000 R15: ffffc90000007800
FS:  00007f32fae8b6c0(0000) GS:ffff8880b8e00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f3fb224bff8 CR3: 00000000603b7000 CR4: 00000000003506f0
DR0: 00000000000000d4 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600
Call Trace:
 <IRQ>
 perf_prepare_sample+0x87f/0x2020 kernel/events/core.c:7600
 __perf_event_output kernel/events/core.c:7740 [inline]
 perf_event_output_forward+0x197/0x2f0 kernel/events/core.c:7760
 __perf_event_overflow+0x457/0x630 kernel/events/core.c:9506
 perf_swevent_overflow+0x19b/0x230 kernel/events/core.c:9589
 perf_swevent_event+0x458/0x570 kernel/events/core.c:-1
 perf_tp_event+0x36b/0xc10 kernel/events/core.c:10074
 perf_trace_run_bpf_submit+0xf3/0x1c0 kernel/events/core.c:10042
 perf_trace_preemptirq_template+0x268/0x320 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+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:ffffc90000007c40 EFLAGS: 00000206
RAX: 457e967a5ef4f500 RBX: 1ffff92000000f90 RCX: 457e967a5ef4f500
RDX: dffffc0000000000 RSI: ffffffff8a8c18a0 RDI: ffffffff8adf68a0
RBP: ffffc90000007d30 R08: ffffffff90b0f26f R09: 1ffffffff2161e4d
R10: dffffc0000000000 R11: fffffbfff2161e4e R12: 0000000000000246
R13: dffffc0000000000 R14: ffff8880b8e3bb00 R15: 0000000000000001
 __rcu_read_unlock+0x78/0xd0 kernel/rcu/tree_plugin.h:426
 rcu_read_unlock include/linux/rcupdate.h:823 [inline]
 rebalance_domains+0x86f/0x9d0 kernel/sched/fair.c:11052
 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:perf_trace_init+0x9e/0x2d0 kernel/trace/trace_event_perf.c:223
Code: 40 2b b8 8c 0f 84 75 01 00 00 4c 89 24 24 4c 8d 63 40 4c 89 e0 48 c1 e8 03 42 0f b6 04 30 84 c0 0f 85 17 01 00 00 4d 63 24 24 <4c> 89 ff 4c 89 e6 e8 07 fe f7 ff 4d 39 e7 0f 85 a9 00 00 00 4c 8d
RSP: 0018:ffffc9000d92fc38 EFLAGS: 00000246
RAX: 0000000000000000 RBX: ffffffff8d7b5c80 RCX: ffff888024a69e00
RDX: 0000000000000000 RSI: 0000000000000a98 RDI: 000000000000011d
RBP: 0000000000000002 R08: ffffffff8cb82a8b R09: 1ffffffff1970551
R10: dffffc0000000000 R11: fffffbfff1970552 R12: 0000000000000a97
R13: 0000000000000000 R14: dffffc0000000000 R15: 000000000000011d
 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: 0033:0x7f32f9f9e159
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:00007f32fae8b028 EFLAGS: 00000246 ORIG_RAX: 000000000000012a
RAX: ffffffffffffffda RBX: 00007f32fa226180 RCX: 00007f32f9f9e159
RDX: fffffffdffffffff RSI: 0000000000000000 RDI: 0000200000000140
RBP: 00007f32fa03506b R08: 0000000000000000 R09: 0000000000000000
R10: ffffffffffffffff R11: 0000000000000246 R12: 0000000000000000
R13: 00007f32fa226218 R14: 00007f32fa226180 R15: 00007fffcb38bb08
 </TASK>