rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: 	Tasks blocked on level-0 rcu_node (CPUs 0-1): P6114/1:b..l
rcu: 	(detected by 1, t=10502 jiffies, g=21765, q=448 ncpus=2)
task:udevd           state:R  running task     stack:25840 pid:6114  tgid:6114  ppid:4538   flags:0x00000002
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5409 [inline]
 __schedule+0x17e8/0x4a50 kernel/sched/core.c:6746
 preempt_schedule_irq+0xfb/0x1c0 kernel/sched/core.c:7068
 irqentry_exit+0x5e/0x90 kernel/entry/common.c:354
 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702
RIP: 0010:lock_acquire+0x264/0x550 kernel/locking/lockdep.c:5758
Code: 2b 00 74 08 4c 89 f7 e8 2a 8a 88 00 f6 44 24 61 02 0f 85 85 01 00 00 41 f7 c7 00 02 00 00 74 01 fb 48 c7 44 24 40 0e 36 e0 45 <4b> c7 44 25 00 00 00 00 00 43 c7 44 25 09 00 00 00 00 43 c7 44 25
RSP: 0018:ffffc90009da7600 EFLAGS: 00000206
RAX: 0000000000000001 RBX: 1ffff920013b4ecc RCX: 0000000000000001
RDX: dffffc0000000000 RSI: ffffffff8bcae7c0 RDI: ffffffff8c1fa320
RBP: ffffc90009da7760 R08: ffffffff92f6e527 R09: 1ffffffff25edca4
R10: dffffc0000000000 R11: fffffbfff25edca5 R12: 1ffff920013b4ec8
R13: dffffc0000000000 R14: ffffc90009da7660 R15: 0000000000000246
 rcu_lock_acquire include/linux/rcupdate.h:329 [inline]
 rcu_read_lock include/linux/rcupdate.h:841 [inline]
 __d_lookup+0xa2/0x7e0 fs/dcache.c:2305
 lookup_fast+0x74/0x4a0 fs/namei.c:1650
 walk_component fs/namei.c:2000 [inline]
 link_path_walk+0x60b/0xea0 fs/namei.c:2331
 path_lookupat+0xa9/0x450 fs/namei.c:2484
 filename_lookup+0x256/0x610 fs/namei.c:2514
 vfs_statx+0x105/0x4e0 fs/stat.c:244
 vfs_fstatat+0x135/0x190 fs/stat.c:304
 __do_sys_newfstatat fs/stat.c:468 [inline]
 __se_sys_newfstatat fs/stat.c:462 [inline]
 __x64_sys_newfstatat+0x125/0x1b0 fs/stat.c:462
 do_syscall_64+0xfb/0x240
 entry_SYSCALL_64_after_hwframe+0x72/0x7a
RIP: 0033:0x7faae4f995f4
RSP: 002b:00007ffee67a7148 EFLAGS: 00000246 ORIG_RAX: 0000000000000106
RAX: ffffffffffffffda RBX: 0000560ca8565b00 RCX: 00007faae4f995f4
RDX: 00007ffee67a71a8 RSI: 00007ffee67a7638 RDI: 00000000ffffff9c
RBP: 0000560ca855f1cc R08: ffffc80000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000560ca856bc30
R13: 00007ffee67a7638 R14: 0000560ca855d8a0 R15: 0000560c9e2ffa04
 </TASK>
rcu: rcu_preempt kthread starved for 10296 jiffies! g21765 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x0 ->cpu=1
rcu: 	Unless rcu_preempt kthread gets sufficient CPU time, OOM is now expected behavior.
rcu: RCU grace-period kthread stack dump:
task:rcu_preempt     state:R  running task     stack:26320 pid:17    tgid:17    ppid:2      flags:0x00004000
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5409 [inline]
 __schedule+0x17e8/0x4a50 kernel/sched/core.c:6746
 __schedule_loop kernel/sched/core.c:6823 [inline]
 schedule+0x14b/0x320 kernel/sched/core.c:6838
 schedule_timeout+0x1be/0x310 kernel/time/timer.c:2582
 rcu_gp_fqs_loop+0x2df/0x1370 kernel/rcu/tree.c:2024
 rcu_gp_kthread+0xa7/0x3b0 kernel/rcu/tree.c:2226
 kthread+0x2f0/0x390 kernel/kthread.c:388
 ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:147
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:243
 </TASK>
rcu: Stack dump where RCU GP kthread last ran:
CPU: 1 PID: 0 Comm: swapper/1 Not tainted 6.9.0-rc2-next-20240404-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/27/2024
RIP: 0010:native_irq_disable arch/x86/include/asm/irqflags.h:37 [inline]
RIP: 0010:arch_local_irq_disable arch/x86/include/asm/irqflags.h:72 [inline]
RIP: 0010:acpi_safe_halt+0x21/0x30 drivers/acpi/processor_idle.c:113
Code: 90 90 90 90 90 90 90 90 90 65 48 8b 04 25 40 d3 03 00 48 f7 00 08 00 00 00 75 10 66 90 0f 00 2d 05 bd a5 00 f3 0f 1e fa fb f4 <fa> c3 cc cc cc cc 66 0f 1f 84 00 00 00 00 00 90 90 90 90 90 90 90
RSP: 0018:ffffc900001a7d08 EFLAGS: 00000246
RAX: ffff8880176e8000 RBX: ffff888017a87064 RCX: 0000000000062941
RDX: 0000000000000001 RSI: ffff888017a87000 RDI: ffff888017a87064
RBP: 000000000003a3f8 R08: ffff8880b9537ccb R09: 1ffff110172a6f99
R10: dffffc0000000000 R11: ffffffff8b83b170 R12: ffff88801a3bc000
R13: 0000000000000000 R14: 0000000000000001 R15: ffffffff8eac6700
FS:  0000000000000000(0000) GS:ffff8880b9500000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000c0000bb800 CR3: 0000000079f08000 CR4: 00000000003526f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <IRQ>
 </IRQ>
 <TASK>
 acpi_idle_enter+0xe4/0x140 drivers/acpi/processor_idle.c:707
 cpuidle_enter_state+0x112/0x480 drivers/cpuidle/cpuidle.c:267
 cpuidle_enter+0x5d/0xa0 drivers/cpuidle/cpuidle.c:388
 call_cpuidle kernel/sched/idle.c:155 [inline]
 cpuidle_idle_call kernel/sched/idle.c:236 [inline]
 do_idle+0x375/0x5d0 kernel/sched/idle.c:332
 cpu_startup_entry+0x42/0x60 kernel/sched/idle.c:430
 start_secondary+0x100/0x100 arch/x86/kernel/smpboot.c:313
 common_startup_64+0x13e/0x147
 </TASK>