rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: 	1-...!: (2 ticks this GP) idle=15d4/1/0x4000000000000000 softirq=39701/39701 fqs=0
rcu: 	(detected by 0, t=10502 jiffies, g=28437, q=583 ncpus=2)
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 UID: 0 PID: 10520 Comm: syz.1.1217 Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/18/2025
RIP: 0010:__remove_hrtimer kernel/time/hrtimer.c:1122 [inline]
RIP: 0010:__run_hrtimer kernel/time/hrtimer.c:1741 [inline]
RIP: 0010:__hrtimer_run_queues+0x374/0xc60 kernel/time/hrtimer.c:1825
Code: e8 f1 fa 11 00 e9 84 00 00 00 48 8b bc 24 90 00 00 00 4c 89 e6 e8 2c c5 c8 09 84 c0 74 07 e8 d3 fa 11 00 eb 69 48 8b 54 24 38 <48> 89 d0 48 c1 e8 03 42 0f b6 04 28 84 c0 0f 85 41 05 00 00 44 8b
RSP: 0018:ffffc90000a08d40 EFLAGS: 00000046
RAX: 1ffff110170e4f00 RBX: ffff8880b8727bc8 RCX: dffffc0000000000
RDX: ffff8880b8727b88 RSI: ffff8880b8727bd0 RDI: ffff888024958348
RBP: ffffc90000a08e90 R08: ffffffff8fa3a637 R09: 1ffffffff1f474c6
R10: dffffc0000000000 R11: fffffbfff1f474c7 R12: ffff888024958340
R13: dffffc0000000000 R14: ffff8880b8727a80 R15: 0000000000000001
FS:  00007f6d872416c0(0000) GS:ffff888125d12000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f6d87240f98 CR3: 000000002fd16000 CR4: 00000000003526f0
Call Trace:
 <IRQ>
 hrtimer_interrupt+0x45b/0xaa0 kernel/time/hrtimer.c:1887
 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1039 [inline]
 __sysvec_apic_timer_interrupt+0x108/0x410 arch/x86/kernel/apic/apic.c:1056
 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1050 [inline]
 sysvec_apic_timer_interrupt+0xa1/0xc0 arch/x86/kernel/apic/apic.c:1050
 </IRQ>
 <TASK>
 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702
RIP: 0010:check_kcov_mode kernel/kcov.c:194 [inline]
RIP: 0010:write_comp_data kernel/kcov.c:246 [inline]
RIP: 0010:__sanitizer_cov_trace_const_cmp4+0x37/0x90 kernel/kcov.c:314
Code: 08 e0 a0 92 65 8b 0d 48 2e e1 10 81 e1 00 01 ff 00 74 11 81 f9 00 01 00 00 75 5b 83 ba 3c 16 00 00 00 74 52 8b 8a 18 16 00 00 <83> f9 03 75 47 48 8b 8a 20 16 00 00 44 8b 8a 1c 16 00 00 49 c1 e1
RSP: 0018:ffffc9011cad6bb0 EFLAGS: 00000246
RAX: ffffffff81df0f4a RBX: 00000000000084cc RCX: 0000000000000000
RDX: ffff88802e7c8000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: dffffc0000000000 R08: ffff88806ea786a4 R09: 1ffff1100dd4f0d4
R10: dffffc0000000000 R11: ffffed100dd4f0d5 R12: ffff88806ea786a4
R13: ffff88806ea78680 R14: 0000000000000000 R15: 0000000000000000
 bpf_verifier_vlog+0x36a/0x900 kernel/bpf/log.c:-1
 bpf_verifier_log_write+0x10a/0x180 kernel/bpf/log.c:313
 print_verifier_state+0x2f6/0x1f40 kernel/bpf/log.c:774
 __mark_chain_precision+0x4fac/0x7160 kernel/bpf/verifier.c:4924
 mark_chain_precision kernel/bpf/verifier.c:4950 [inline]
 check_cond_jmp_op+0xc4c/0x2910 kernel/bpf/verifier.c:16714
 do_check_insn kernel/bpf/verifier.c:19960 [inline]
 do_check+0x6751/0xe520 kernel/bpf/verifier.c:20097
 do_check_common+0x1949/0x24f0 kernel/bpf/verifier.c:23264
 do_check_main kernel/bpf/verifier.c:23347 [inline]
 bpf_check+0x1746a/0x1d2d0 kernel/bpf/verifier.c:24707
 bpf_prog_load+0x1318/0x1930 kernel/bpf/syscall.c:2979
 __sys_bpf+0x528/0x870 kernel/bpf/syscall.c:6029
 __do_sys_bpf kernel/bpf/syscall.c:6139 [inline]
 __se_sys_bpf kernel/bpf/syscall.c:6137 [inline]
 __x64_sys_bpf+0x7c/0x90 kernel/bpf/syscall.c:6137
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0xfa/0x3b0 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f6d8638eec9
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:00007f6d87241038 EFLAGS: 00000246 ORIG_RAX: 0000000000000141
RAX: ffffffffffffffda RBX: 00007f6d865e5fa0 RCX: 00007f6d8638eec9
RDX: 0000000000000048 RSI: 00002000000017c0 RDI: 0000000000000005
RBP: 00007f6d86411f91 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f6d865e6038 R14: 00007f6d865e5fa0 R15: 00007ffcc326c5b8
 </TASK>
rcu: rcu_preempt kthread timer wakeup didn't happen for 10501 jiffies! g28437 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x402
rcu: 	Possible timer handling issue on cpu=1 timer-softirq=15272
rcu: rcu_preempt kthread starved for 10502 jiffies! g28437 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x402 ->cpu=1
rcu: 	Unless rcu_preempt kthread gets sufficient CPU time, OOM is now expected behavior.
rcu: RCU grace-period kthread stack dump:
task:rcu_preempt     state:I stack:27160 pid:16    tgid:16    ppid:2      task_flags:0x208040 flags:0x00004000
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5357 [inline]
 __schedule+0x1798/0x4cc0 kernel/sched/core.c:6961
 __schedule_loop kernel/sched/core.c:7043 [inline]
 schedule+0x165/0x360 kernel/sched/core.c:7058
 schedule_timeout+0x12b/0x270 kernel/time/sleep_timeout.c:99
 rcu_gp_fqs_loop+0x301/0x1540 kernel/rcu/tree.c:2083
 rcu_gp_kthread+0x99/0x390 kernel/rcu/tree.c:2285
 kthread+0x70e/0x8a0 kernel/kthread.c:463
 ret_from_fork+0x439/0x7d0 arch/x86/kernel/process.c:148
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
 </TASK>