rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: 	Tasks blocked on level-0 rcu_node (CPUs 0-1): P4541/1:b..l
rcu: 	(detected by 1, t=10502 jiffies, g=32709, q=577 ncpus=2)
task:udevd           state:R  running task     stack:23736 pid:4541  tgid:4541  ppid:1      flags:0x00000002
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5408 [inline]
 __schedule+0x17e8/0x4a20 kernel/sched/core.c:6745
 preempt_schedule_irq+0xfb/0x1c0 kernel/sched/core.c:7067
 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:acl_permission_check fs/namei.c:346 [inline]
RIP: 0010:generic_permission+0xe9/0x550 fs/namei.c:407
Code: 89 de e8 7a 20 0e 00 89 c3 e8 03 fa 76 09 65 48 8b 2c 25 00 d5 03 00 48 81 c5 a0 08 00 00 48 89 e8 48 c1 e8 03 42 80 3c 20 00 <74> 08 48 89 ef e8 ad 46 ec ff 48 8b 6d 00 48 83 c5 20 48 89 e8 48
RSP: 0018:ffffc900034df738 EFLAGS: 00000246
RAX: 1ffff1100fb57114 RBX: 0000000000000000 RCX: ffff88807dab8000
RDX: 0000000000000000 RSI: ffffffff8e1da7e0 RDI: ffffffff8e47d4e0
RBP: ffff88807dab88a0 R08: ffffffff820fa9b1 R09: ffffffff821108ca
R10: 0000000000000002 R11: ffff88807dab8000 R12: dffffc0000000000
R13: 1ffff11003aba19b R14: 00000000000041ed R15: ffff88801d5d0cb0
 do_inode_permission fs/namei.c:468 [inline]
 inode_permission+0xa6/0x460 fs/namei.c:528
 may_lookup fs/namei.c:1718 [inline]
 link_path_walk+0x289/0xea0 fs/namei.c:2273
 path_openat+0x24a/0x3280 fs/namei.c:3803
 do_filp_open+0x235/0x490 fs/namei.c:3834
 do_sys_openat2+0x13e/0x1d0 fs/open.c:1405
 do_sys_open fs/open.c:1420 [inline]
 __do_sys_openat fs/open.c:1436 [inline]
 __se_sys_openat fs/open.c:1431 [inline]
 __x64_sys_openat+0x247/0x2a0 fs/open.c:1431
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fc0b251a477
RSP: 002b:00007ffd0474cd58 EFLAGS: 00000287 ORIG_RAX: 0000000000000101
RAX: ffffffffffffffda RBX: 000055b4ab6a6e60 RCX: 00007fc0b251a477
RDX: 0000000000090800 RSI: 000055b4ab698830 RDI: 00000000ffffff9c
RBP: 000055b4ab7b7b00 R08: 0000000000090800 R09: 000055b4ab698830
R10: 0000000000000000 R11: 0000000000000287 R12: 000055b4ab698830
R13: 00000000000000ff R14: 000055b48cc671c4 R15: 0000000000000000
 </TASK>
rcu: rcu_preempt kthread starved for 10404 jiffies! g32709 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:25752 pid:17    tgid:17    ppid:2      flags:0x00004000
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5408 [inline]
 __schedule+0x17e8/0x4a20 kernel/sched/core.c:6745
 __schedule_loop kernel/sched/core.c:6822 [inline]
 schedule+0x14b/0x320 kernel/sched/core.c:6837
 schedule_timeout+0x1be/0x310 kernel/time/timer.c:2581
 rcu_gp_fqs_loop+0x2df/0x1330 kernel/rcu/tree.c:2000
 rcu_gp_kthread+0xa7/0x3b0 kernel/rcu/tree.c:2202
 kthread+0x2f2/0x390 kernel/kthread.c:389
 ret_from_fork+0x4d/0x80 arch/x86/kernel/process.c:147
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244
 </TASK>
rcu: Stack dump where RCU GP kthread last ran:
CPU: 1 PID: 0 Comm: swapper/1 Not tainted 6.10.0-rc3-syzkaller-00044-g2ccbdf43d5e7 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/07/2024
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 00 d5 03 00 48 f7 00 08 00 00 00 75 10 eb 07 0f 00 2d e5 b9 a2 00 f3 0f 1e fa fb f4 <fa> e9 84 72 29 00 66 0f 1f 84 00 00 00 00 00 90 90 90 90 90 90 90
RSP: 0018:ffffc900001a7d08 EFLAGS: 00000246
RAX: ffff888017ae0000 RBX: ffff88801bae9064 RCX: 00000000002b5141
RDX: 0000000000000001 RSI: ffff88801bae9000 RDI: ffff88801bae9064
RBP: 000000000003a5b8 R08: ffff8880b9537d0b R09: 1ffff110172a6fa1
R10: dffffc0000000000 R11: ffffffff8b86ca30 R12: ffff88801bbf2000
R13: 0000000000000000 R14: 0000000000000001 R15: ffffffff8eace760
FS:  0000000000000000(0000) GS:ffff8880b9500000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000020001040 CR3: 000000002296c000 CR4: 0000000000350ef0
Call Trace:
 <IRQ>
 </IRQ>
 <TASK>
 acpi_idle_enter+0xe4/0x140 drivers/acpi/processor_idle.c:707
 cpuidle_enter_state+0x114/0x480 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>