rcu: INFO: rcu_preempt detected expedited stalls on CPUs/tasks: { 0-.... } 2681 jiffies s: 23421 root: 0x1/.
rcu: blocking rcu_node structures (internal RCU debug):
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 PID: 9440 Comm: syz.4.4628 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/18/2025
RIP: 0010:tracing_generic_entry_update include/linux/trace_events.h:161 [inline]
RIP: 0010:perf_trace_buf_update+0xa0/0x220 kernel/trace/trace_event_perf.c:433
Code: 00 9c 8f 44 24 40 be 00 02 00 00 45 31 ff 48 23 74 24 40 41 0f 94 c7 31 ff e8 8c fa f7 ff 44 89 ff e8 34 78 fb ff 4c 8d 7b 03 <4c> 89 f9 48 c1 e9 03 42 0f b6 0c 21 84 c9 0f 85 af 00 00 00 41 88
RSP: 0018:ffffc90004d46ec0 EFLAGS: 00000002
RAX: 0000000000250002 RBX: ffffe8ffffcbd000 RCX: 0000000000250000
RDX: 0000000000000000 RSI: 0000000000000002 RDI: 0000000000000000
RBP: ffffc90004d46f70 R08: dffffc0000000000 R09: ffffed1005cc1001
R10: ffffed1005cc1001 R11: 1ffff11005cc1000 R12: dffffc0000000000
R13: 1ffff920009a8ddc R14: 000000000000011b R15: ffffe8ffffcbd003
FS:  000055558867b500(0000) GS:ffff8880b8e00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000200000000140 CR3: 0000000077121000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 perf_tp_event+0x132/0xb60 kernel/events/core.c:10025
 perf_trace_run_bpf_submit+0xf3/0x1c0 kernel/events/core.c:10002
 perf_trace_preemptirq_template+0x287/0x330 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+0x84/0x500 kernel/rcu/tree_plugin.h:685
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 2d 97 96 7e 41 f7 c6 00 00 f0 00 74 45 <48> c7 44 24 40 0e 36 e0 45 4a c7 04 2b 00 00 00 00 66 42 c7 44 2b
RSP: 0018:ffffc90004d47420 EFLAGS: 00000206
RAX: d28cd8880f7a0d00 RBX: 1ffff920009a8e8c RCX: d28cd8880f7a0d00
RDX: dffffc0000000000 RSI: ffffffff8a8c0500 RDI: ffffffff8adefd20
RBP: ffffc90004d47520 R08: dffffc0000000000 R09: fffffbfff215c45c
R10: fffffbfff215c45c R11: 1ffffffff215c45b R12: 0000000000000246
R13: dffffc0000000000 R14: ffff8880b8e3b900 R15: 0000000000000001
 __rcu_read_unlock+0x78/0xd0 kernel/rcu/tree_plugin.h:426
 rcu_read_unlock include/linux/rcupdate.h:823 [inline]
 d_alloc_parallel+0x119a/0x1480 fs/dcache.c:2734
 __lookup_slow+0x113/0x3a0 fs/namei.c:1675
 lookup_slow+0x53/0x70 fs/namei.c:1707
 walk_component fs/namei.c:1998 [inline]
 link_path_walk+0x928/0xe50 fs/namei.c:2325
 path_openat+0x276/0x2e70 fs/namei.c:3779
 do_filp_open+0x1c1/0x3c0 fs/namei.c:3810
 do_sys_openat2+0x142/0x490 fs/open.c:1318
 do_sys_open fs/open.c:1334 [inline]
 __do_sys_openat fs/open.c:1350 [inline]
 __se_sys_openat fs/open.c:1345 [inline]
 __x64_sys_openat+0x135/0x160 fs/open.c:1345
 do_syscall_x64 arch/x86/entry/common.c:51 [inline]
 do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:81
 entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7f93b318d710
Code: 48 89 44 24 20 75 93 44 89 54 24 0c e8 69 95 02 00 44 8b 54 24 0c 89 da 48 89 ee 41 89 c0 bf 9c ff ff ff b8 01 01 00 00 0f 05 <48> 3d 00 f0 ff ff 77 38 44 89 c7 89 44 24 0c e8 bc 95 02 00 8b 44
RSP: 002b:00007ffdf0bacda0 EFLAGS: 00000293 ORIG_RAX: 0000000000000101
RAX: ffffffffffffffda RBX: 0000000000000002 RCX: 00007f93b318d710
RDX: 0000000000000002 RSI: 00007ffdf0bace30 RDI: 00000000ffffff9c
RBP: 00007ffdf0bace30 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000293 R12: 0000000000000000
R13: 00007f93b33e5fa0 R14: 00007f93b33e5fa0 R15: 0000000000000002
 </TASK>