rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: 	(detected by 1, t=12438 jiffies, g=9165, q=671 ncpus=2)
rcu: All QSes seen, last rcu_preempt kthread activity 12438 (4294977465-4294965027), jiffies_till_next_fqs=1, root ->qsmask 0x0
rcu: rcu_preempt kthread starved for 12438 jiffies! g9165 f0x2 RCU_GP_WAIT_FQS(5) ->state=0x0 ->cpu=0
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:25816 pid:17    tgid:17    ppid:2      task_flags:0x208040 flags:0x00004000
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5377 [inline]
 __schedule+0x190e/0x4c90 kernel/sched/core.c:6764
 __schedule_loop kernel/sched/core.c:6841 [inline]
 schedule+0x14b/0x320 kernel/sched/core.c:6856
 schedule_timeout+0x15a/0x290 kernel/time/sleep_timeout.c:99
 rcu_gp_fqs_loop+0x2df/0x1330 kernel/rcu/tree.c:2024
 rcu_gp_kthread+0xa7/0x3b0 kernel/rcu/tree.c:2226
 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:
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 UID: 101 PID: 5501 Comm: dhcpcd Not tainted 6.14.0-rc1-syzkaller-00026-gd009de7d5428 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 12/27/2024
RIP: 0010:task_wait_context kernel/locking/lockdep.c:4784 [inline]
RIP: 0010:check_wait_context kernel/locking/lockdep.c:4873 [inline]
RIP: 0010:__lock_acquire+0x7ca/0x2100 kernel/locking/lockdep.c:5178
Code: 05 97 c0 67 7e 85 c0 74 45 49 8d 9d c0 0a 00 00 48 89 d8 48 c1 e8 03 0f b6 04 10 84 c0 0f 85 00 14 00 00 b0 03 83 3b 00 75 44 <49> 8d 9d d8 0a 00 00 48 89 d8 48 c1 e8 03 0f b6 04 10 84 c0 0f 85
RSP: 0000:ffffc900000078f0 EFLAGS: 00000046
RAX: 0000000000000003 RBX: ffff8880303c46c0 RCX: 0000000000000002
RDX: dffffc0000000000 RSI: ffff8880303c46f0 RDI: ffffffff942f9840
RBP: 0000000000000002 R08: ffffffff942f9847 R09: 1ffffffff285f308
R10: dffffc0000000000 R11: fffffbfff285f309 R12: 0000000000000003
R13: ffff8880303c3c00 R14: 1ffff110060788f6 R15: ffff8880303c47b0
FS:  00007fca73eb6740(0000) GS:ffff8880b8600000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000055dad90a52f0 CR3: 000000002fdb6000 CR4: 00000000003526f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <NMI>
 </NMI>
 <IRQ>
 lock_acquire+0x1ed/0x550 kernel/locking/lockdep.c:5851
 __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [inline]
 _raw_spin_lock_irqsave+0xd5/0x120 kernel/locking/spinlock.c:162
 debug_object_activate+0x17f/0x580 lib/debugobjects.c:818
 debug_hrtimer_activate kernel/time/hrtimer.c:455 [inline]
 debug_activate kernel/time/hrtimer.c:496 [inline]
 enqueue_hrtimer+0x30/0x3c0 kernel/time/hrtimer.c:1100
 __run_hrtimer kernel/time/hrtimer.c:1818 [inline]
 __hrtimer_run_queues+0x6cb/0xd30 kernel/time/hrtimer.c:1865
 hrtimer_interrupt+0x403/0xa40 kernel/time/hrtimer.c:1927
 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1038 [inline]
 __sysvec_apic_timer_interrupt+0x110/0x420 arch/x86/kernel/apic/apic.c:1055
 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1049 [inline]
 sysvec_apic_timer_interrupt+0xa1/0xc0 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:csd_lock_wait kernel/smp.c:340 [inline]
RIP: 0010:smp_call_function_many_cond+0x1bb2/0x2d30 kernel/smp.c:885
Code: 01 31 ff e8 b0 e8 0b 00 41 83 e4 01 4c 8b 64 24 68 75 07 e8 60 e4 0b 00 eb 41 f3 90 48 b8 00 00 00 00 00 fc ff df 0f b6 04 03 <84> c0 75 11 41 f7 45 00 01 00 00 00 74 1e e8 3b e4 0b 00 eb db 44
RSP: 0000:ffffc90003497460 EFLAGS: 00000293
RAX: 0000000000000000 RBX: 1ffff110170e88f9 RCX: ffff8880303c3c00
RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000000
RBP: ffffc90003497660 R08: ffffffff81b379b0 R09: 1ffffffff285f308
R10: dffffc0000000000 R11: fffffbfff285f309 R12: ffff8880b863fb48
R13: ffff8880b87447c8 R14: ffff8880b863fb40 R15: 0000000000000001
 on_each_cpu_cond_mask+0x3f/0x80 kernel/smp.c:1052
 __flush_tlb_multi arch/x86/include/asm/paravirt.h:91 [inline]
 flush_tlb_multi arch/x86/mm/tlb.c:966 [inline]
 flush_tlb_mm_range+0x42d/0x710 arch/x86/mm/tlb.c:1054
 flush_tlb_page arch/x86/include/asm/tlbflush.h:255 [inline]
 ptep_clear_flush+0x11a/0x170 mm/pgtable-generic.c:101
 wp_page_copy mm/memory.c:3501 [inline]
 do_wp_page+0x1c64/0x49b0 mm/memory.c:3827
 handle_pte_fault mm/memory.c:5905 [inline]
 __handle_mm_fault+0x24d5/0x70f0 mm/memory.c:6032
 handle_mm_fault+0x3e5/0x8d0 mm/memory.c:6201
 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: 0033:0x7fca73f32208
Code: c6 75 7f 80 7c 24 2e 00 74 78 48 39 55 68 75 72 48 39 44 24 08 73 6b 48 8d 0c 1a 48 29 d8 48 89 4d 70 48 89 4d 78 48 89 4d 68 <4c> 89 71 10 4c 89 71 18 48 3d ff 03 00 00 76 10 48 c7 41 20 00 00
RSP: 002b:00007ffdf1b62920 EFLAGS: 00010206
RAX: 0000000000001e30 RBX: 00000000000003e0 RCX: 000055dad90a52e0
RDX: 000055dad90a4f00 RSI: 000055dad90a7110 RDI: 000055dad9095010
RBP: 00007fca7405baa0 R08: 00007fca7405bb00 R09: 00007fca7405bed0
R10: 000000000000004c R11: 0000000000000000 R12: 000000000000003e
R13: 000000000000003c R14: 00007fca7405bb00 R15: 00000000000003e0
 </TASK>