rcu: INFO: rcu_preempt detected expedited stalls on CPUs/tasks: { 1-...D } 2646 jiffies s: 613 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: 0 Comm: swapper/1 Not tainted 6.7.0-syzkaller-01193-g6c1dd1fe5d8a #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 11/17/2023
RIP: 0010:preempt_count arch/x86/include/asm/preempt.h:27 [inline]
RIP: 0010:check_kcov_mode kernel/kcov.c:173 [inline]
RIP: 0010:write_comp_data+0x12/0x80 kernel/kcov.c:236
Code: 04 25 80 c2 03 00 48 8b 80 f0 15 00 00 c3 66 2e 0f 1f 84 00 00 00 00 00 49 89 d2 49 89 f8 49 89 f1 65 48 8b 14 25 80 c2 03 00 <65> 8b 05 ff b5 7b 7e a9 00 01 ff 00 74 0f f6 c4 01 74 59 8b 82 fc
RSP: 0018:ffffc900001f0e38 EFLAGS: 00000046
RAX: 0000000000000001 RBX: ffff8880b992c040 RCX: ffffffff8176be19
RDX: ffff8880156bbb80 RSI: 0000000000000000 RDI: 0000000000000001
RBP: 0000000000000001 R08: 0000000000000001 R09: 0000000000000000
R10: 0000000000000001 R11: ffffffff8acf2ec0 R12: ffff8880b992bf40
R13: 0000000000000001 R14: ffff888013121340 R15: ffffffff88a50d10
FS:  0000000000000000(0000) GS:ffff8880b9900000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00005614a470c710 CR3: 000000006ced4000 CR4: 0000000000350ef0
Call Trace:
 <NMI>
 </NMI>
 <IRQ>
 trace_hrtimer_expire_entry include/trace/events/timer.h:259 [inline]
 __run_hrtimer kernel/time/hrtimer.c:1685 [inline]
 __hrtimer_run_queues+0x9e9/0xc20 kernel/time/hrtimer.c:1752
 hrtimer_interrupt+0x31b/0x800 kernel/time/hrtimer.c:1814
 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1065 [inline]
 __sysvec_apic_timer_interrupt+0x105/0x400 arch/x86/kernel/apic/apic.c:1082
 sysvec_apic_timer_interrupt+0x90/0xb0 arch/x86/kernel/apic/apic.c:1076
 </IRQ>
 <TASK>
 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:649
RIP: 0010:__schedule+0xf1a/0x5c00 kernel/sched/core.c:6607
Code: fa 48 c1 ea 03 80 3c 02 00 0f 85 48 47 00 00 48 8b bd 10 ff ff ff 4d 89 6f 10 4c 89 ee e8 ce b3 7b f6 48 89 c7 e8 b6 9c d6 f6 <48> 8b 8d a0 fe ff ff 48 b8 00 00 00 00 00 fc ff df 48 01 c1 48 c7
RSP: 0018:ffffc90000187c60 EFLAGS: 00000246
RAX: 0000000000000003 RBX: ffff8880156bbb80 RCX: 1ffffffff1e7397b
RDX: 0000000000000000 RSI: ffffffff8b2f2840 RDI: ffffffff8a84c3aa
RBP: ffffc90000187df0 R08: 0000000000000000 R09: 0000000000000000
R10: ffffffff8f399817 R11: 0000000000000000 R12: ffff8880b993d7c8
R13: 0000000000000000 R14: ffff8880156bbe30 R15: ffff8880b993ccc0
 schedule_idle+0x5b/0x90 kernel/sched/core.c:6842
 do_idle+0x28c/0x400 kernel/sched/idle.c:340
 cpu_startup_entry+0x50/0x60 kernel/sched/idle.c:410
 start_secondary+0x20e/0x2a0 arch/x86/kernel/smpboot.c:336
 secondary_startup_64_no_verify+0x170/0x17b
 </TASK>
INFO: NMI handler (nmi_cpu_backtrace_handler) took too long to run: 1.209 msecs