rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: 	Tasks blocked on level-0 rcu_node (CPUs 0-1): P5319/1:b..l P4556/1:b..l
rcu: 	(detected by 1, t=10502 jiffies, g=9617, q=496 ncpus=2)
task:udevd           state:R  running task     stack:24976 pid:4556  tgid:4556  ppid:1      flags:0x00000002
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5188 [inline]
 __schedule+0x1800/0x4a60 kernel/sched/core.c:6529
 preempt_schedule_irq+0xfb/0x1c0 kernel/sched/core.c:6851
 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:kernfs_iop_permission+0x305/0x4d0 fs/kernfs/inode.c:293
Code: 49 89 5f 68 49 8d 5f 78 48 89 d8 48 c1 e8 03 0f b6 04 28 84 c0 0f 85 b5 01 00 00 44 89 23 eb 14 e8 20 25 5d ff b8 f6 ff ff ff <e9> 88 00 00 00 e8 11 25 5d ff 49 8d 5d 64 48 89 d8 48 c1 e8 03 0f
RSP: 0018:ffffc90009b57840 EFLAGS: 00000293
RAX: 00000000fffffff6 RBX: 1ffff110049c3a84 RCX: ffff88805a0b8000
RDX: 0000000000000000 RSI: 0000000000000080 RDI: 0000000000000000
RBP: ffff888024e1d420 R08: ffffffff82365b8d R09: 1ffff9200136af51
R10: dffffc0000000000 R11: ffffffff82365b60 R12: ffff888024e1d422
R13: ffffffff8e482060 R14: 0000000000000081 R15: ffff888024e1d420
 do_inode_permission fs/namei.c:468 [inline]
 inode_permission+0x23d/0x460 fs/namei.c:535
 may_lookup fs/namei.c:1746 [inline]
 link_path_walk+0x204/0xea0 fs/namei.c:2352
 path_lookupat+0xa9/0x450 fs/namei.c:2565
 filename_lookup+0x256/0x610 fs/namei.c:2595
 vfs_statx+0x103/0x490 fs/stat.c:312
 vfs_fstatat+0x145/0x190 fs/stat.c:341
 __do_sys_newfstatat fs/stat.c:505 [inline]
 __se_sys_newfstatat fs/stat.c:499 [inline]
 __x64_sys_newfstatat+0x11d/0x1a0 fs/stat.c:499
 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: 0033:0x7f4810b165f4
RSP: 002b:00007fff75a4a808 EFLAGS: 00000246 ORIG_RAX: 0000000000000106
RAX: ffffffffffffffda RBX: 0000559c13a5c2b0 RCX: 00007f4810b165f4
RDX: 00007fff75a4a818 RSI: 00007fff75a4aca8 RDI: 00000000ffffff9c
RBP: 00007fff75a4a8a8 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00007fff75a4aca8
R13: 00007fff75a4a818 R14: 0000559c13a39910 R15: 0000000000000000
 </TASK>
task:syz.1.25        state:R  running task     stack:23056 pid:5319  tgid:5316  ppid:5117   flags:0x00004002
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5188 [inline]
 __schedule+0x1800/0x4a60 kernel/sched/core.c:6529
 preempt_schedule_common+0x84/0xd0 kernel/sched/core.c:6708
 preempt_schedule+0xe1/0xf0 kernel/sched/core.c:6732
 preempt_schedule_thunk+0x1a/0x30 arch/x86/entry/thunk.S:12
 __raw_spin_unlock include/linux/spinlock_api_smp.h:143 [inline]
 _raw_spin_unlock+0x3e/0x50 kernel/locking/spinlock.c:186
 spin_unlock include/linux/spinlock.h:391 [inline]
 zap_pte_range mm/memory.c:1688 [inline]
 zap_pmd_range mm/memory.c:1736 [inline]
 zap_pud_range mm/memory.c:1765 [inline]
 zap_p4d_range mm/memory.c:1786 [inline]
 unmap_page_range+0x3818/0x42c0 mm/memory.c:1807
 unmap_vmas+0x3cc/0x5f0 mm/memory.c:1897
 exit_mmap+0x264/0xc80 mm/mmap.c:3412
 __mmput+0x115/0x390 kernel/fork.c:1345
 exit_mm+0x220/0x310 kernel/exit.c:571
 do_exit+0x9b2/0x27f0 kernel/exit.c:869
 do_group_exit+0x207/0x2c0 kernel/exit.c:1031
 get_signal+0x16a1/0x1740 kernel/signal.c:2917
 arch_do_signal_or_restart+0x96/0x860 arch/x86/kernel/signal.c:310
 exit_to_user_mode_loop kernel/entry/common.c:111 [inline]
 exit_to_user_mode_prepare include/linux/entry-common.h:328 [inline]
 __syscall_exit_to_user_mode_work kernel/entry/common.c:207 [inline]
 syscall_exit_to_user_mode+0xc9/0x370 kernel/entry/common.c:218
 do_syscall_64+0x100/0x230 arch/x86/entry/common.c:89
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f9454b75f19
RSP: 002b:00007f94559a8048 EFLAGS: 00000246 ORIG_RAX: 0000000000000133
RAX: 000000000000011c RBX: 00007f9454d06038 RCX: 00007f9454b75f19
RDX: 00000000000004ff RSI: 00000000200092c0 RDI: 0000000000000003
RBP: 00007f9454be4e68 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 000000000000006e R14: 00007f9454d06038 R15: 00007fff3b3e8e48
 </TASK>
rcu: rcu_preempt kthread starved for 10575 jiffies! g9617 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:24912 pid:17    tgid:17    ppid:2      flags:0x00004000
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5188 [inline]
 __schedule+0x1800/0x4a60 kernel/sched/core.c:6529
 __schedule_loop kernel/sched/core.c:6606 [inline]
 schedule+0x14b/0x320 kernel/sched/core.c:6621
 schedule_timeout+0x1be/0x310 kernel/time/timer.c:2581
 rcu_gp_fqs_loop+0x2df/0x1330 kernel/rcu/tree.c:2034
 rcu_gp_kthread+0xa7/0x3b0 kernel/rcu/tree.c:2236
 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 UID: 0 PID: 0 Comm: swapper/1 Not tainted 6.10.0-syzkaller-12381-gc33ffdb70cc6 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/27/2024
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:92 [inline]
RIP: 0010:acpi_safe_halt+0x21/0x30 drivers/acpi/processor_idle.c:112
Code: 90 90 90 90 90 90 90 90 90 65 48 8b 04 25 40 d7 03 00 48 f7 00 08 00 00 00 75 10 eb 07 0f 00 2d 05 4f 99 00 f3 0f 1e fa fb f4 <fa> e9 e4 85 1f 00 66 0f 1f 84 00 00 00 00 00 90 90 90 90 90 90 90
RSP: 0018:ffffc900001a7d08 EFLAGS: 00000246
RAX: ffff8880176e8000 RBX: ffff88801d298064 RCX: 0000000000092e19
RDX: 0000000000000001 RSI: ffff88801d298000 RDI: ffff88801d298064
RBP: 000000000003a6b8 R08: ffff8880b9537c7b R09: 1ffff110172a6f8f
R10: dffffc0000000000 R11: ffffffff8b90b6d0 R12: ffff88801a3dc000
R13: 0000000000000000 R14: 0000000000000001 R15: ffffffff8ead9820
FS:  0000000000000000(0000) GS:ffff8880b9500000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000555593d8e808 CR3: 00000000655b4000 CR4: 0000000000350ef0
Call Trace:
 <IRQ>
 </IRQ>
 <TASK>
 acpi_idle_enter+0xe4/0x140 drivers/acpi/processor_idle.c:702
 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:230 [inline]
 do_idle+0x375/0x5d0 kernel/sched/idle.c:326
 cpu_startup_entry+0x42/0x60 kernel/sched/idle.c:424
 start_secondary+0x100/0x100 arch/x86/kernel/smpboot.c:313
 common_startup_64+0x13e/0x147
 </TASK>