rcu: INFO: rcu_preempt detected expedited stalls on CPUs/tasks: { 1-.... } 2634 jiffies s: 4829 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: 4483 Comm: udevd Not tainted 6.5.0-rc4-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/12/2023
RIP: 0010:check_kcov_mode kernel/kcov.c:173 [inline]
RIP: 0010:__sanitizer_cov_trace_pc+0x20/0x70 kernel/kcov.c:207
Code: 0f 1f 84 00 00 00 00 00 66 90 f3 0f 1e fa 65 8b 05 5d b1 7d 7e 89 c1 48 8b 34 24 81 e1 00 01 00 00 65 48 8b 14 25 80 b9 03 00 <a9> 00 01 ff 00 74 0e 85 c9 74 35 8b 82 04 16 00 00 85 c0 74 2b 8b
RSP: 0018:ffffc900001e0bb8 EFLAGS: 00000206
RAX: 0000000000000101 RBX: 00000000002af31d RCX: 0000000000000100
RDX: ffff88807cc41dc0 RSI: ffffffff88582710 RDI: 0000000000000006
RBP: 00000001ad7f29ab R08: 0000000000000006 R09: 0000000000000000
R10: 00000001ad7f29ab R11: 0000000000000000 R12: 0000000000989680
R13: 0000000000000001 R14: 0000000000044b82 R15: 0000000000000000
FS:  00007f682aaafc80(0000) GS:ffff8880b9900000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00000000f7276760 CR3: 00000000204c5000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <NMI>
 </NMI>
 <IRQ>
 pie_calculate_probability+0x2a0/0x850 net/sched/sch_pie.c:345
 fq_pie_timer+0x1da/0x4f0 net/sched/sch_fq_pie.c:387
 call_timer_fn+0x1a0/0x580 kernel/time/timer.c:1700
 expire_timers kernel/time/timer.c:1751 [inline]
 __run_timers+0x764/0xb10 kernel/time/timer.c:2022
 run_timer_softirq+0x58/0xd0 kernel/time/timer.c:2035
 __do_softirq+0x218/0x965 kernel/softirq.c:553
 invoke_softirq kernel/softirq.c:427 [inline]
 __irq_exit_rcu kernel/softirq.c:632 [inline]
 irq_exit_rcu+0xb7/0x120 kernel/softirq.c:644
 sysvec_apic_timer_interrupt+0x93/0xc0 arch/x86/kernel/apic/apic.c:1109
 </IRQ>
 <TASK>
 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:645
RIP: 0010:d_revalidate fs/namei.c:858 [inline]
RIP: 0010:lookup_fast+0x1ad/0x520 fs/namei.c:1651
Code: e8 48 3c 99 ff 48 89 ea 48 b8 00 00 00 00 00 fc ff df 48 c1 ea 03 0f b6 04 02 84 c0 74 08 3c 03 0f 8e b5 02 00 00 44 8b 65 00 <31> ff 41 83 e4 04 44 89 e6 e8 85 37 99 ff 45 85 e4 74 90 e8 0b 3c
RSP: 0018:ffffc900049af950 EFLAGS: 00000246
RAX: 0000000000000000 RBX: ffffc900049afb60 RCX: 0000000000000000
RDX: 1ffff1100cf7fb1f RSI: ffffffff81eccbd8 RDI: ffffffff8ac804a0
RBP: ffff888067bfd8f8 R08: 0000000000000000 R09: fffffbfff1d57122
R10: ffffffff8eab8917 R11: 0000000000000000 R12: 0000000000280004
R13: ffffc900049afb98 R14: ffffc900049afb70 R15: ffffc900049afb60
 walk_component+0x5b/0x5a0 fs/namei.c:1994
 link_path_walk.part.0.constprop.0+0x71f/0xce0 fs/namei.c:2325
 link_path_walk fs/namei.c:2249 [inline]
 path_lookupat+0x93/0x770 fs/namei.c:2478
 filename_lookup+0x1e7/0x5b0 fs/namei.c:2508
 vfs_statx+0x160/0x430 fs/stat.c:238
 vfs_fstatat+0x90/0xb0 fs/stat.c:276
 __do_sys_newfstatat+0x98/0x110 fs/stat.c:446
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x38/0xb0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x63/0xcd
RIP: 0033:0x7f682ab855f4
Code: 64 c7 00 09 00 00 00 83 c8 ff c3 48 89 f2 b9 00 01 00 00 48 89 fe bf 9c ff ff ff e9 00 00 00 00 41 89 ca b8 06 01 00 00 0f 05 <45> 31 c0 3d 00 f0 ff ff 76 10 48 8b 15 03 a8 0d 00 f7 d8 41 83 c8
RSP: 002b:00007ffc39229c08 EFLAGS: 00000246 ORIG_RAX: 0000000000000106
RAX: ffffffffffffffda RBX: 000055d74d6d1140 RCX: 00007f682ab855f4
RDX: 00007ffc39229c18 RSI: 00007ffc3922a0a8 RDI: 00000000ffffff9c
RBP: 00007ffc39229ca8 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00007ffc3922a0a8
R13: 00007ffc39229c18 R14: 000055d74d6a6910 R15: 0000000000000000
 </TASK>