rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: 	0-....: (0 ticks this GP) idle=b79/1/0x4000000000000002 softirq=9292/9292 fqs=5245 
	(detected by 1, t=10502 jiffies, g=11125, q=1217)
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 PID: 4997 Comm: syz-executor Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/25/2025
RIP: 0010:__lock_acquire+0x4a5/0x7c60 kernel/locking/lockdep.c:4955
Code: 8b 84 24 b0 00 00 00 c1 e0 0f 0f b7 c0 09 d8 8b 8c 24 90 00 00 00 83 e1 03 c1 e1 10 09 c1 8b 44 24 68 83 e0 01 c1 e0 12 09 c8 <8b> 8c 24 c8 00 00 00 c1 e1 13 41 c1 e5 14 41 09 cd 45 09 f5 41 09
RSP: 0018:ffffc90002e8eca0 EFLAGS: 00000006
RAX: 0000000000020000 RBX: 0000000000000000 RCX: 0000000000020000
RDX: 0000000000000015 RSI: 0000000000000000 RDI: ffff888025962988
RBP: ffffc90002e8eef0 R08: dffffc0000000000 R09: 0000000000000001
R10: fffffbfff1ad26b6 R11: 1ffffffff1ad26b5 R12: ffff888025962894
R13: 0000000000000000 R14: 0000000000000015 R15: ffff888025962978
FS:  000055557b823500(0000) GS:ffff8880b9000000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007efe510e7000 CR3: 000000005d296000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000600
Call Trace:
 <TASK>
 lock_acquire+0x197/0x3f0 kernel/locking/lockdep.c:5623
 rcu_lock_acquire+0x2a/0x30 include/linux/rcupdate.h:313
 rcu_read_lock include/linux/rcupdate.h:740 [inline]
 __task_pid_nr_ns+0x21/0x420 kernel/pid.c:497
 perf_event_pid_type kernel/events/core.c:1446 [inline]
 perf_event_pid kernel/events/core.c:1455 [inline]
 __perf_event_header__init_id+0x144/0x500 kernel/events/core.c:7105
 perf_prepare_sample+0x158/0x1cb0 kernel/events/core.c:7624
 __perf_event_output kernel/events/core.c:7802 [inline]
 perf_event_output_forward+0x146/0x280 kernel/events/core.c:7822
 __perf_event_overflow+0x364/0x530 kernel/events/core.c:9515
 perf_swevent_overflow kernel/events/core.c:9591 [inline]
 perf_swevent_event+0x4ad/0x530 kernel/events/core.c:9629
 perf_tp_event+0x32c/0xb50 kernel/events/core.c:10047
 perf_trace_run_bpf_submit+0xf3/0x1c0 kernel/events/core.c:10021
 perf_trace_preemptirq_template+0x2be/0x380 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+0x84/0x480 kernel/rcu/tree_plugin.h:674
Code: f1 f1 f1 00 f2 f2 f2 4a 89 04 2b 66 42 c7 44 2b 09 f3 f3 42 c6 44 2b 0b f3 65 44 8b 35 ed 11 9e 7e 41 f7 c6 00 00 f0 00 74 45 <48> c7 44 24 20 0e 36 e0 45 4a c7 04 2b 00 00 00 00 66 42 c7 44 2b
RSP: 0018:ffffc90002e8f880 EFLAGS: 00000206
RAX: 5a93334c860d0e00 RBX: 1ffff920005d1f14 RCX: 5a93334c860d0e00
RDX: dffffc0000000000 RSI: ffffffff8a0b1be0 RDI: ffffffff8a59e800
RBP: ffffc90002e8f960 R08: dffffc0000000000 R09: fffffbfff1ff542f
R10: fffffbfff1ff542f R11: 1ffffffff1ff542e R12: ffffffff8c120c00
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]
 __bpf_trace_run kernel/trace/bpf_trace.c:1879 [inline]
 bpf_trace_run2+0x1da/0x2d0 kernel/trace/bpf_trace.c:1915
 __bpf_trace_kfree+0x6e/0x90 include/trace/events/kmem.h:118
 trace_kfree include/trace/events/kmem.h:118 [inline]
 kfree+0x25f/0x2a0 mm/slub.c:4554
 tomoyo_path_perm+0x3e8/0x510 security/tomoyo/file.c:842
 tomoyo_path_symlink+0xa0/0xe0 security/tomoyo/tomoyo.c:199
 security_path_symlink+0xdc/0x130 security/security.c:1179
 do_symlinkat+0xff/0x6c0 fs/namei.c:4461
 __do_sys_symlinkat fs/namei.c:4483 [inline]
 __se_sys_symlinkat fs/namei.c:4480 [inline]
 __x64_sys_symlinkat+0x95/0xa0 fs/namei.c:4480
 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: 0033:0x7efe5115ccc7
Code: 73 01 c3 48 c7 c1 a8 ff ff ff f7 d8 64 89 01 48 83 c8 ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 b8 0a 01 00 00 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:00007ffdf34e9f18 EFLAGS: 00000202 ORIG_RAX: 000000000000010a
RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007efe5115ccc7
RDX: 00007efe511e38c3 RSI: 00000000ffffff9c RDI: 00007efe511e2390
RBP: 00007ffdf34e9f5c R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000202 R12: 0000000000000001
R13: 00000000000927c0 R14: 000000000001b6e2 R15: 00007ffdf34e9fb0
 </TASK>