rcu: INFO: rcu_preempt self-detected stall on CPU
rcu: 	1-....: (1 GPs behind) idle=caec/1/0x4000000000000000 softirq=180664/180665 fqs=5248
rcu: 	         hardirqs   softirqs   csw/system
rcu: 	 number:    18559          0            0
rcu: 	cputime:      136      56750            0   ==> 52500(ms)
rcu: 	(t=10502 jiffies g=241001 q=4250 ncpus=2)
CPU: 1 UID: 0 PID: 5914 Comm: udevd Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/16/2026
RIP: 0010:seqcount_lockdep_reader_access+0xec/0x100 include/linux/seqlock.h:76
Code: 00 75 11 e8 b6 0b 13 00 4d 85 ff 75 16 e8 ac 0b 13 00 eb 15 e8 a5 0b 13 00 e8 30 3e 1d 0a 4d 85 ff 74 ea e8 96 0b 13 00 fb 5b <41> 5e 41 5f e9 06 3a 5c ff cc 66 2e 0f 1f 84 00 00 00 00 00 90 90
RSP: 0018:ffffc90000a08d80 EFLAGS: 00000246
RAX: ffffffff81b406fa RBX: 0000000000000000 RCX: ffff888031be5d00
RDX: 0000000000000100 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 1bc34b9ecfd97dd8 R08: ffffffff90579e37 R09: 1ffffffff20af3c6
R10: dffffc0000000000 R11: fffffbfff20af3c7 R12: ffff88802b334798
R13: ffff888054d37330 R14: ffffffff81b40b45 R15: 0000000000000200
FS:  00007f0d26b66880(0000) GS:ffff88812504b000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000555585ffb4e8 CR3: 00000000552f3000 CR4: 0000000000350ef0
Call Trace:
 <IRQ>
 ktime_get+0x45/0x220 kernel/time/timekeeping.c:971
 gate_get_time net/sched/act_gate.c:23 [inline]
 gate_timer_func+0x1dc/0x450 net/sched/act_gate.c:101
 __run_hrtimer kernel/time/hrtimer.c:2032 [inline]
 __hrtimer_run_queues+0x3bc/0xa10 kernel/time/hrtimer.c:2096
 hrtimer_run_softirq+0x17a/0x240 kernel/time/hrtimer.c:2113
 handle_softirqs+0x225/0x840 kernel/softirq.c:622
 __do_softirq kernel/softirq.c:656 [inline]
 invoke_softirq kernel/softirq.c:496 [inline]
 __irq_exit_rcu+0xca/0x220 kernel/softirq.c:735
 irq_exit_rcu+0x9/0x30 kernel/softirq.c:752
 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1062 [inline]
 sysvec_apic_timer_interrupt+0xa6/0xc0 arch/x86/kernel/apic/apic.c:1062
 </IRQ>
 <TASK>
 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:674
RIP: 0010:step_into fs/namei.c:-1 [inline]
RIP: 0010:walk_component fs/namei.c:2288 [inline]
RIP: 0010:link_path_walk+0xd4c/0x1910 fs/namei.c:2656
Code: 7c 24 28 e8 a6 7d fe ff 49 89 c7 48 3d 00 f0 ff ff 0f 86 91 01 00 00 e8 22 d3 7a ff e9 ff f9 ff ff e8 18 d3 7a ff 48 8b 1c 24 <48> 8b 7c 24 08 be 02 00 00 00 4c 89 fa e8 42 1d 00 00 49 89 c7 e9
RSP: 0018:ffffc90004fef8a0 EFLAGS: 00000293
RAX: ffffffff824c3f78 RBX: ffffc90004fefad8 RCX: ffff888031be5d00
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: dffffc0000000000 R08: ffff88801c28d11f R09: 1ffff11003851a23
R10: dffffc0000000000 R11: ffffed1003851a24 R12: ffffc90004fefad0
R13: ffffc90004fefaa8 R14: 000000000000006e R15: ffff888078bb3a70
 path_lookupat+0xe4/0x8c0 fs/namei.c:2812
 filename_lookup+0x265/0x5d0 fs/namei.c:2842
 vfs_statx+0xfc/0x200 fs/stat.c:353
 vfs_fstatat+0x11b/0x170 fs/stat.c:373
 __do_sys_newfstatat fs/stat.c:538 [inline]
 __se_sys_newfstatat fs/stat.c:532 [inline]
 __x64_sys_newfstatat+0x151/0x200 fs/stat.c:532
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0x174/0x580 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f0d26511b0a
Code: 48 8b 15 f1 f2 0d 00 f7 d8 64 89 02 b8 ff ff ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 41 89 ca b8 06 01 00 00 0f 05 <3d> 00 f0 ff ff 77 07 31 c0 c3 0f 1f 40 00 48 8b 15 b9 f2 0d 00 f7
RSP: 002b:00007ffd7e29bc58 EFLAGS: 00000206 ORIG_RAX: 0000000000000106
RAX: ffffffffffffffda RBX: 000055796d626bd1 RCX: 00007f0d26511b0a
RDX: 00007ffd7e29bc60 RSI: 00007ffd7e29bcf0 RDI: 00000000ffffff9c
RBP: 000055796d61a910 R08: 000055796d626bd1 R09: 0000000000000000
R10: 0000000000000100 R11: 0000000000000206 R12: 000055796d61aa00
R13: 00007ffd7e29bcf0 R14: 000055796d5fa64c R15: 000055796a783bcc
 </TASK>
sched: DL replenish lagged too much