rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: 	0-....: (1 GPs behind) idle=249/1/0x4000000000000002 softirq=67936/67950 fqs=5246 
	(detected by 1, t=10502 jiffies, g=93249, q=1948)
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 PID: 23984 Comm: syz.0.4129 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:172 [inline]
RIP: 0010:__sanitizer_cov_trace_pc+0x23/0x60 kernel/kcov.c:206
Code: 00 00 cc cc 00 00 cc 48 8b 04 24 65 48 8b 0d 74 4d 89 7e 65 8b 15 75 4d 89 7e 81 e2 00 01 ff 00 74 11 81 fa 00 01 00 00 75 35 <83> b9 34 16 00 00 00 74 2c 8b 91 10 16 00 00 83 fa 02 75 21 48 8b
RSP: 0018:ffffc90000007140 EFLAGS: 00000046
RAX: ffffffff8100fccb RBX: 0000000000000000 RCX: ffff888021e7d940
RDX: 0000000000000100 RSI: 0000000000000000 RDI: 0000000000000000
RBP: ffffc90000007220 R08: ffffffff8d89db2f R09: 1ffffffff1b13b65
R10: dffffc0000000000 R11: fffffbfff1b13b66 R12: ffffc90003d5ff58
R13: ffffc90003d5ff58 R14: ffffffff8c125da0 R15: dffffc0000000000
FS:  00007ff6f3f196c0(0000) GS:ffff8880b9000000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000100000002 CR3: 000000004eec7000 CR4: 00000000003506f0
DR0: 0000200000000300 DR1: 0000200000000300 DR2: 0000000000000004
DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600
Call Trace:
 <IRQ>
 perf_callchain_user+0xeb/0xfd0 arch/x86/events/core.c:2874
 get_perf_callchain+0x33d/0x460 kernel/events/callchain.c:221
 perf_callchain kernel/events/core.c:7606 [inline]
 perf_prepare_sample+0x352/0x1cd0 kernel/events/core.c:7633
 __perf_event_output kernel/events/core.c:7802 [inline]
 perf_event_output_forward+0x185/0x2e0 kernel/events/core.c:7822
 __perf_event_overflow+0x364/0x530 kernel/events/core.c:9515
 perf_tp_event+0x383/0xbf0 kernel/events/core.c:10047
 perf_trace_run_bpf_submit+0xf3/0x1c0 kernel/events/core.c:10021
 perf_trace_preemptirq_template+0x2aa/0x360 include/trace/events/preemptirq.h:14
 trace_irq_enable_rcuidle+0x108/0x180 include/trace/events/preemptirq.h:40
 trace_hardirqs_on+0x57/0x80 kernel/trace/trace_preemptirq.c:44
 asm_sysvec_irq_work+0x16/0x20 arch/x86/include/asm/idtentry.h:713
RIP: 0010:rcu_read_unlock_special+0x7f/0x4a0 kernel/rcu/tree_plugin.h:674
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 e2 f0 9c 7e 41 f7 c6 00 00 f0 00 74 40 <48> c7 44 24 20 0e 36 e0 45 4a c7 04 2b 00 00 00 00 42 c7 44 2b 08
RSP: 0018:ffffc900000079e0 EFLAGS: 00000206
RAX: fd661e2b44974800 RBX: 1ffff92000000f40 RCX: fd661e2b44974800
RDX: dffffc0000000000 RSI: ffffffff8a2b2780 RDI: ffffffff8a79f740
RBP: ffffc90000007ac0 R08: ffffffff901d21bf R09: 1ffffffff203a437
R10: dffffc0000000000 R11: fffffbfff203a438 R12: ffffffff8c322f00
R13: dffffc0000000000 R14: 0000000000000246 R15: 0000000000000001
 __rcu_read_unlock+0x78/0xd0 kernel/rcu/tree_plugin.h:422
 rcu_read_unlock include/linux/rcupdate.h:772 [inline]
 hsr_announce+0x29a/0x310 net/hsr/hsr_device.c:410
 call_timer_fn+0x17b/0x540 kernel/time/timer.c:1648
 expire_timers kernel/time/timer.c:1699 [inline]
 __run_timers+0x53e/0x800 kernel/time/timer.c:1970
 run_timer_softirq+0x63/0xf0 kernel/time/timer.c:1983
 handle_softirqs+0x339/0x830 kernel/softirq.c:576
 __do_softirq kernel/softirq.c:610 [inline]
 invoke_softirq kernel/softirq.c:450 [inline]
 __irq_exit_rcu+0x13b/0x230 kernel/softirq.c:659
 irq_exit_rcu+0x5/0x20 kernel/softirq.c:671
 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1108 [inline]
 sysvec_apic_timer_interrupt+0xa0/0xc0 arch/x86/kernel/apic/apic.c:1108
 </IRQ>
 <TASK>
 asm_sysvec_apic_timer_interrupt+0x16/0x20 arch/x86/include/asm/idtentry.h:676
RIP: 0010:variable_test_bit arch/x86/include/asm/bitops.h:214 [inline]
RIP: 0010:test_bit include/asm-generic/bitops/instrumented-non-atomic.h:135 [inline]
RIP: 0010:tomoyo_check_acl+0x2e2/0x3f0 security/tomoyo/domain.c:184
Code: c5 e0 08 00 00 4d 8d 74 24 ff 44 89 f7 c1 ef 03 81 e7 f8 1f 00 00 4c 8b 7c 24 28 4c 01 ff be 08 00 00 00 e8 f0 8e 1a fe 31 f6 <4d> 0f a3 37 40 0f 93 c5 40 0f 92 c6 bf 02 00 00 00 e8 c8 83 d5 fd
RSP: 0018:ffffc90003d5fb98 EFLAGS: 00000246
RAX: ffffffff83a3a001 RBX: dffffc0000000000 RCX: ffffffff83a3a0c0
RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffff888075a862c0
RBP: ffff888075a86201 R08: ffff888075a862c7 R09: 1ffff1100eb50c58
R10: dffffc0000000000 R11: ffffed100eb50c59 R12: 0000000000000093
R13: 0000000000001200 R14: 0000000000000092 R15: ffff888075a862b0
 tomoyo_path_number_perm+0x396/0x660 security/tomoyo/file.c:733
 security_file_ioctl+0x6c/0xa0 security/security.c:1555
 __do_sys_ioctl fs/ioctl.c:868 [inline]
 __se_sys_ioctl+0x48/0x170 fs/ioctl.c:860
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x66/0xd0
RIP: 0033:0x7ff6f5cbef79
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:00007ff6f3f19028 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007ff6f5f38fa0 RCX: 00007ff6f5cbef79
RDX: 0000200000001200 RSI: 0000000000008b26 RDI: 0000000000000004
RBP: 00007ff6f5d557e0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007ff6f5f39038 R14: 00007ff6f5f38fa0 R15: 00007ffd475d53b8
 </TASK>