rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: 	Tasks blocked on level-0 rcu_node (CPUs 0-1): P9908/1:b..l P8984/1:b..l
rcu: 	(detected by 1, t=10503 jiffies, g=33137, q=289 ncpus=2)
task:udevd           state:R  running task     stack:21696 pid:8984  tgid:8984  ppid:5202   task_flags:0x400140 flags:0x00000002
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5373 [inline]
 __schedule+0x190e/0x4c90 kernel/sched/core.c:6760
 preempt_schedule_irq+0xfb/0x1c0 kernel/sched/core.c:7082
 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:unwind_next_frame+0x38c/0x2380 arch/x86/kernel/unwind_orc.c:505
Code: 00 48 01 db 48 01 d3 0f 84 45 01 00 00 4c 8d 7b 04 4c 8d 73 05 4c 89 f8 48 c1 e8 03 48 bd 00 00 00 00 00 fc ff df 0f b6 04 28 <84> c0 0f 85 de 18 00 00 4c 89 f0 48 c1 e8 03 0f b6 04 28 84 c0 0f
RSP: 0018:ffffc9000bdeeec8 EFLAGS: 00000a07
RAX: 0000000000000000 RBX: ffffffff90d22650 RCX: ffffffff90579120
RDX: ffffffff90d22650 RSI: ffffffff8c814d40 RDI: ffffffff8c814d00
RBP: dffffc0000000000 R08: 0000000000000001 R09: 1ffffffff28acc08
R10: dffffc0000000000 R11: fffffbfff28acc09 R12: ffffffff8206274f
R13: 0000000000000000 R14: ffffffff90d22655 R15: ffffffff90d22654
 arch_stack_walk+0x11c/0x150 arch/x86/kernel/stacktrace.c:25
 stack_trace_save+0x118/0x1d0 kernel/stacktrace.c:122
 save_stack+0xfb/0x1f0 mm/page_owner.c:156
 __set_page_owner+0x89/0x530 mm/page_owner.c:320
 set_page_owner include/linux/page_owner.h:32 [inline]
 post_alloc_hook+0x1f4/0x240 mm/page_alloc.c:1629
 prep_new_page mm/page_alloc.c:1637 [inline]
 get_page_from_freelist+0x365c/0x37a0 mm/page_alloc.c:3555
 __alloc_frozen_pages_noprof+0x292/0x710 mm/page_alloc.c:4817
 alloc_pages_mpol+0x311/0x660 mm/mempolicy.c:2270
 folio_alloc_mpol_noprof+0x36/0x70 mm/mempolicy.c:2289
 shmem_alloc_folio mm/shmem.c:1863 [inline]
 shmem_alloc_and_add_folio+0x4a0/0x1090 mm/shmem.c:1902
 shmem_get_folio_gfp+0x621/0x1840 mm/shmem.c:2511
 shmem_get_folio mm/shmem.c:2617 [inline]
 shmem_write_begin+0x165/0x350 mm/shmem.c:3267
 generic_perform_write+0x346/0x990 mm/filemap.c:4190
 shmem_file_write_iter+0xf9/0x120 mm/shmem.c:3443
 new_sync_write fs/read_write.c:591 [inline]
 vfs_write+0xacf/0xd10 fs/read_write.c:684
 ksys_write+0x18f/0x2b0 fs/read_write.c:736
 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: 0033:0x7fa97396ebf2
RSP: 002b:00007ffedab74d58 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 00005605736842b0 RCX: 00007fa97396ebf2
RDX: 0000000000000011 RSI: 00005605736756a0 RDI: 0000000000000009
RBP: 0000000000000011 R08: 0000000000000000 R09: 00007ffedab74908
R10: 000000000000010f R11: 0000000000000246 R12: 0000000000000011
R13: 00005605736756a0 R14: 00007ffedab75228 R15: 000056056f96bec8
 </TASK>
task:sed             state:R  running task     stack:23968 pid:9908  tgid:9908  ppid:9907   task_flags:0x400000 flags:0x00000002
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5373 [inline]
 __schedule+0x190e/0x4c90 kernel/sched/core.c:6760
 preempt_schedule_common+0x84/0xd0 kernel/sched/core.c:6939
 preempt_schedule+0xe1/0xf0 kernel/sched/core.c:6963
 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]
 finish_fault+0xa76/0x11d0 mm/memory.c:5308
 do_cow_fault mm/memory.c:5480 [inline]
 do_fault mm/memory.c:5574 [inline]
 do_pte_missing mm/memory.c:4091 [inline]
 handle_pte_fault mm/memory.c:5935 [inline]
 __handle_mm_fault+0x4814/0x7100 mm/memory.c:6078
 handle_mm_fault+0x3e5/0x8d0 mm/memory.c:6247
 do_user_addr_fault arch/x86/mm/fault.c:1337 [inline]
 handle_page_fault arch/x86/mm/fault.c:1480 [inline]
 exc_page_fault+0x459/0x8b0 arch/x86/mm/fault.c:1538
 asm_exc_page_fault+0x26/0x30 arch/x86/include/asm/idtentry.h:623
RIP: 0033:0x7f171da3773a
RSP: 002b:00007ffea2bcd710 EFLAGS: 00010202
RAX: 0000000017f3ecce RBX: 0000000000000000 RCX: 00007f171da4ee20
RDX: 00000000000000f5 RSI: 0000000000000000 RDI: 00007ffea2bcd7d0
RBP: 00007ffea2bcd7c0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000000 R12: 00007ffea2bcd7d0
R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000
 </TASK>
rcu: rcu_preempt kthread starved for 10299 jiffies! g33137 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:25728 pid:15    tgid:15    ppid:2      task_flags:0x208040 flags:0x00004000
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5373 [inline]
 __schedule+0x190e/0x4c90 kernel/sched/core.c:6760
 __schedule_loop kernel/sched/core.c:6837 [inline]
 schedule+0x14b/0x320 kernel/sched/core.c:6852
 schedule_timeout+0x15a/0x290 kernel/time/sleep_timeout.c:99
 rcu_gp_fqs_loop+0x2df/0x1330 kernel/rcu/tree.c:2044
 rcu_gp_kthread+0xa7/0x3b0 kernel/rcu/tree.c:2246
 kthread+0x7a9/0x920 kernel/kthread.c:464
 ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:148
 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 6.14.0-rc2-next-20250214-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 12/27/2024
RIP: 0010:ieee80211_rx_h_amsdu net/mac80211/rx.c:3118 [inline]
RIP: 0010:ieee80211_rx_handlers+0x20b0/0xbc30 net/mac80211/rx.c:4146
Code: ef 48 c7 c6 c0 de 15 90 e8 2d 4f 40 f6 45 85 ed 0f 84 d4 01 00 00 41 83 fd 01 0f 85 d4 01 00 00 e8 95 49 40 f6 e9 19 20 00 00 <e8> 8b 49 40 f6 49 bf 00 00 00 00 00 fc ff df 48 8b 44 24 70 42 80
RSP: 0018:ffffc900001f03e0 EFLAGS: 00000246
RAX: 0000000000000100 RBX: 0000000000000000 RCX: 23629fd49bf5c300
RDX: ffff88801d2abc00 RSI: 0000000000000000 RDI: 0000000000000008
RBP: ffffc900001f0730 R08: ffffffff8b81d0aa R09: 1ffff1100f6775b3
R10: dffffc0000000000 R11: ffffed100f6775b4 R12: 0000000000000000
R13: ffffc900001f0a50 R14: 0000000000000080 R15: ffff88805eeb1850
FS:  0000000000000000(0000) GS:ffff8880b8700000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f0279b58f15 CR3: 000000002fd60000 CR4: 00000000003526f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <IRQ>
 ieee80211_invoke_rx_handlers net/mac80211/rx.c:4190 [inline]
 ieee80211_prepare_and_rx_handle+0x299e/0x6460 net/mac80211/rx.c:5040
 __ieee80211_rx_handle_packet net/mac80211/rx.c:5281 [inline]
 ieee80211_rx_list+0x2aa6/0x3480 net/mac80211/rx.c:5416
 ieee80211_rx_napi+0x18a/0x3c0 net/mac80211/rx.c:5439
 ieee80211_rx include/net/mac80211.h:5179 [inline]
 ieee80211_handle_queued_frames+0xe7/0x1e0 net/mac80211/main.c:441
 tasklet_action_common+0x426/0x620 kernel/softirq.c:811
 handle_softirqs+0x2d4/0x9b0 kernel/softirq.c:561
 __do_softirq kernel/softirq.c:595 [inline]
 invoke_softirq kernel/softirq.c:435 [inline]
 __irq_exit_rcu+0xf7/0x220 kernel/softirq.c:662
 irq_exit_rcu+0x9/0x30 kernel/softirq.c:678
 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1049 [inline]
 sysvec_apic_timer_interrupt+0xa6/0xc0 arch/x86/kernel/apic/apic.c:1049
 </IRQ>
 <TASK>
 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702
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 80 d6 03 00 48 f7 00 08 00 00 00 75 10 66 90 0f 00 2d e5 1f 7c 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:ffffc90000187d08 EFLAGS: 00000246
RAX: ffff88801d2abc00 RBX: ffff8880216a2864 RCX: ffffffff8c0ea51c
RDX: 0000000000000001 RSI: ffff8880216a2800 RDI: ffff8880216a2864
RBP: 000000000003aab8 R08: ffff8880b873799b R09: 1ffff110170e6f33
R10: dffffc0000000000 R11: ffffffff8c0ebff0 R12: ffff88801f73a000
R13: 0000000000000001 R14: 0000000000000001 R15: ffffffff8f33ede0
 acpi_idle_enter+0xe4/0x140 drivers/acpi/processor_idle.c:701
 cpuidle_enter_state+0x109/0x470 drivers/cpuidle/cpuidle.c:268
 cpuidle_enter+0x5d/0xa0 drivers/cpuidle/cpuidle.c:389
 call_cpuidle kernel/sched/idle.c:155 [inline]
 cpuidle_idle_call kernel/sched/idle.c:230 [inline]
 do_idle+0x372/0x5c0 kernel/sched/idle.c:325
 cpu_startup_entry+0x42/0x60 kernel/sched/idle.c:423
 start_secondary+0x102/0x110 arch/x86/kernel/smpboot.c:315
 common_startup_64+0x13e/0x147
 </TASK>