rcu: INFO: rcu_preempt detected expedited stalls on CPUs/tasks: { 1-.... } 2627 jiffies s: 67425 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: 16372 Comm: syz.1.3081 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2026
RIP: 0010:check_kcov_mode kernel/kcov.c:182 [inline]
RIP: 0010:write_comp_data kernel/kcov.c:245 [inline]
RIP: 0010:__sanitizer_cov_trace_const_cmp4+0x2a/0x80 kernel/kcov.c:313
Code: 48 8b 04 24 65 48 8b 15 44 f7 7f 7e 65 8b 0d 45 f7 7f 7e 81 e1 00 01 ff 00 74 11 81 f9 00 01 00 00 75 5b 83 ba 1c 16 00 00 00 <74> 52 8b 8a f8 15 00 00 83 f9 03 75 47 48 8b 8a 00 16 00 00 44 8b
RSP: 0018:ffffc900001e0500 EFLAGS: 00000046
RAX: ffffffff8185fe0b RBX: ffff8880793fbb80 RCX: 0000000000000100
RDX: ffff8880793fbb80 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 0000000000000011 R08: ffff8880793fbb87 R09: 1ffff1100f27f770
R10: dffffc0000000000 R11: ffffed100f27f771 R12: 000000000000400c
R13: 0000000000000101 R14: 0000000000000000 R15: 0000000000000000
FS:  00007f9b47fd56c0(0000) GS:ffff8880b8f00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f9d64fe1000 CR3: 00000000757f2000 CR4: 00000000003506e0
DR0: 0000200000000300 DR1: 0000200000000300 DR2: 0000200000000300
DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600
Call Trace:
 <IRQ>
 tracing_gen_ctx_irq_test+0x9b/0x150 kernel/trace/trace.c:2645
 tracing_gen_ctx_flags include/linux/trace_events.h:185 [inline]
 tracing_gen_ctx include/linux/trace_events.h:192 [inline]
 perf_trace_buf_update+0xa8/0x230 kernel/trace/trace_event_perf.c:433
 perf_tp_event+0x217/0xc30 kernel/events/core.c:10060
 perf_trace_run_bpf_submit+0xf3/0x1c0 kernel/events/core.c:10032
 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 d2 33 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:ffffc900001e0ac0 EFLAGS: 00000206
RAX: 6ec39bc361cf5500 RBX: 1ffff9200003c160 RCX: 6ec39bc361cf5500
RDX: dffffc0000000000 RSI: ffffffff8a8c10a0 RDI: ffffffff8adf0d20
RBP: ffffc900001e0bb0 R08: ffff8880b8f3580b R09: 1ffff110171e6b01
R10: dffffc0000000000 R11: ffffed10171e6b02 R12: 0000000000000246
R13: dffffc0000000000 R14: ffff8880b8f3b900 R15: 0000000000000002
 __rcu_read_unlock+0x78/0xd0 kernel/rcu/tree_plugin.h:426
 rcu_read_unlock include/linux/rcupdate.h:823 [inline]
 ieee80211_iterate_active_interfaces_atomic+0x156/0x170 net/mac80211/util.c:826
 mac80211_hwsim_beacon+0xb7/0x1b0 drivers/net/wireless/mac80211_hwsim.c:2147
 __run_hrtimer kernel/time/hrtimer.c:1747 [inline]
 __hrtimer_run_queues+0x54a/0xd50 kernel/time/hrtimer.c:1811
 hrtimer_run_softirq+0x183/0x2a0 kernel/time/hrtimer.c:1828
 handle_softirqs+0x2a1/0x930 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:__sanitizer_cov_trace_pc+0x0/0x60 kernel/kcov.c:212
Code: 2e 0f 1f 84 00 00 00 00 00 90 53 48 89 fb e8 17 00 00 00 48 8b 3d 90 6c 9d 0c 48 89 de 5b e9 97 41 50 00 00 00 cc cc 00 00 cc <48> 8b 04 24 65 48 8b 0d a4 fa 7f 7e 65 8b 15 a5 fa 7f 7e 81 e2 00
RSP: 0018:ffffc90004c7fa08 EFLAGS: 00000283
RAX: 000000000000000a RBX: dffffc0000000000 RCX: 0000000000000001
RDX: ffffffff8a1eb916 RSI: ffffffff8e08f740 RDI: 0000000000000058
RBP: ffff0000ffffff00 R08: ffff8880793fbb80 R09: 000000000000000a
R10: 0000000000000078 R11: 0000000000000000 R12: ffff0000ffffff00
R13: 1ffffffff15b0ce4 R14: ffffffff8ad86724 R15: 0000000000000033
 format_decode+0x88e/0x1300 lib/vsprintf.c:2615
 vsnprintf+0xef/0x1c20 lib/vsprintf.c:2757
 snprintf+0xe5/0x140 lib/vsprintf.c:2940
 tomoyo_audit_path_number_log security/tomoyo/file.c:233 [inline]
 tomoyo_path_number_perm+0x3de/0x650 security/tomoyo/file.c:734
 security_file_ioctl+0x6c/0xa0 security/security.c:1569
 __do_sys_ioctl fs/ioctl.c:864 [inline]
 __se_sys_ioctl+0x48/0x170 fs/ioctl.c:856
 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: 0033:0x7f9b49d9c819
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:00007f9b47fd5028 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007f9b4a016090 RCX: 00007f9b49d9c819
RDX: 0000200000000740 RSI: 00000000000089e2 RDI: 0000000000000007
RBP: 00007f9b49e32c91 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f9b4a016128 R14: 00007f9b4a016090 R15: 00007ffc48975cc8
 </TASK>