rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: 	0-...!: (1 GPs behind) idle=00f4/1/0x4000000000000000 softirq=22035/22035 fqs=119
rcu: 	(detected by 1, t=10505 jiffies, g=15809, q=777 ncpus=2)
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 UID: 0 PID: 6497 Comm: dhcpcd-run-hook Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/02/2025
RIP: 0010:lock_release+0x5/0x3e0 kernel/locking/lockdep.c:5876
Code: 03 48 8b 3c 24 e9 08 fa ff ff 66 66 2e 0f 1f 84 00 00 00 00 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 f3 0f 1e fa 55 <41> 57 41 56 41 55 41 54 53 48 83 ec 30 49 89 f5 49 89 fe 65 48 8b
RSP: 0018:ffffc90000007c60 EFLAGS: 00000006
RAX: ffffffff895fe16c RBX: ffffffff895fe0a8 RCX: ffff888024d55ac0
RDX: 0000000000010000 RSI: ffffffff895fe0a8 RDI: ffffffff8df3d2e0
RBP: 0000000000000001 R08: ffff8880290ff15f R09: 1ffff1100521fe2b
R10: dffffc0000000000 R11: ffffed100521fe2c R12: ffff8880290ff360
R13: ffff8880290ff000 R14: 1872fbe2586e25aa R15: ffff88807a6b3800
FS:  00007f59cd3a9c80(0000) GS:ffff88812613e000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f59cd5fe286 CR3: 00000000317c2000 CR4: 00000000003526f0
Call Trace:
 <IRQ>
 rcu_lock_release include/linux/rcupdate.h:341 [inline]
 rcu_read_unlock include/linux/rcupdate.h:897 [inline]
 advance_sched+0xb23/0xc90 net/sched/sch_taprio.c:992
 __run_hrtimer kernel/time/hrtimer.c:1777 [inline]
 __hrtimer_run_queues+0x52c/0xc60 kernel/time/hrtimer.c:1841
 hrtimer_interrupt+0x45b/0xaa0 kernel/time/hrtimer.c:1903
 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1041 [inline]
 __sysvec_apic_timer_interrupt+0x10b/0x410 arch/x86/kernel/apic/apic.c:1058
 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1052 [inline]
 sysvec_apic_timer_interrupt+0xa1/0xc0 arch/x86/kernel/apic/apic.c:1052
 </IRQ>
 <TASK>
 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:697
RIP: 0010:__raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:152 [inline]
RIP: 0010:_raw_spin_unlock_irqrestore+0xa8/0x110 kernel/locking/spinlock.c:194
Code: 74 05 e8 5b 1c 7f f6 48 c7 44 24 20 00 00 00 00 9c 8f 44 24 20 f6 44 24 21 02 75 4f f7 c3 00 02 00 00 74 01 fb bf 01 00 00 00 <e8> 53 4a 47 f6 65 8b 05 dc 78 25 07 85 c0 74 40 48 c7 04 24 0e 36
RSP: 0018:ffffc90003d97be0 EFLAGS: 00000206
RAX: becaef1e824e5c00 RBX: 0000000000000a02 RCX: becaef1e824e5c00
RDX: 0000000000000000 RSI: ffffffff8d70bf53 RDI: 0000000000000001
RBP: ffffc90003d97c70 R08: ffffffff8f7cd477 R09: 1ffffffff1ef9a8e
R10: dffffc0000000000 R11: fffffbfff1ef9a8f R12: dffffc0000000000
R13: ffff888072052b60 R14: ffffffff99a8a7e8 R15: 1ffff920007b2f7c
 debug_object_activate+0x2e2/0x420 lib/debugobjects.c:836
 debug_percpu_counter_activate lib/percpu_counter.c:44 [inline]
 __percpu_counter_init_many+0x1e1/0x380 lib/percpu_counter.c:214
 mm_init+0xbdb/0xfa0 kernel/fork.c:1086
 bprm_mm_init fs/exec.c:261 [inline]
 alloc_bprm+0x398/0x5c0 fs/exec.c:1466
 do_execveat_common+0x1b3/0x6a0 fs/exec.c:1811
 do_execve fs/exec.c:1934 [inline]
 __do_sys_execve fs/exec.c:2010 [inline]
 __se_sys_execve fs/exec.c:2005 [inline]
 __x64_sys_execve+0x94/0xb0 fs/exec.c:2005
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0xfa/0xfa0 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f59cd544107
Code: 0f 00 64 c7 00 07 00 00 00 b8 ff ff ff ff c9 c3 0f 1f 00 48 8b 05 a9 ee 0f 00 48 8b 10 e9 01 00 00 00 90 b8 3b 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 8b 0d c1 ec 0f 00 f7 d8 64 89 01 48
RSP: 002b:00007ffe1b6794a8 EFLAGS: 00000246 ORIG_RAX: 000000000000003b
RAX: ffffffffffffffda RBX: 00005617e37bb078 RCX: 00007f59cd544107
RDX: 00005617e37bb0a0 RSI: 00005617e37bb078 RDI: 00005617e37bb130
RBP: 00005617e37bb130 R08: 00007ffe1b67de8f R09: 0000000000000000
R10: 0000000000000008 R11: 0000000000000246 R12: 00005617e37bb0a0
R13: 00007f59cd709e8b R14: 00005617e37bb0a0 R15: 0000000000000000
 </TASK>
rcu: rcu_preempt kthread starved for 9909 jiffies! g15809 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:27224 pid:16    tgid:16    ppid:2      task_flags:0x208040 flags:0x00080000
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5325 [inline]
 __schedule+0x1798/0x4cc0 kernel/sched/core.c:6929
 __schedule_loop kernel/sched/core.c:7011 [inline]
 schedule+0x165/0x360 kernel/sched/core.c:7026
 schedule_timeout+0x12b/0x270 kernel/time/sleep_timeout.c:99
 rcu_gp_fqs_loop+0x301/0x1540 kernel/rcu/tree.c:2083
 rcu_gp_kthread+0x99/0x390 kernel/rcu/tree.c:2285
 kthread+0x711/0x8a0 kernel/kthread.c:463
 ret_from_fork+0x4bc/0x870 arch/x86/kernel/process.c:158
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
 </TASK>
rcu: Stack dump where RCU GP kthread last ran:
CPU: 1 UID: 0 PID: 6246 Comm: udevd Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/02/2025
RIP: 0010:csd_lock_wait kernel/smp.c:342 [inline]
RIP: 0010:smp_call_function_many_cond+0xd38/0x12d0 kernel/smp.c:877
Code: 89 ee 83 e6 01 31 ff e8 b6 73 0b 00 41 83 e5 01 49 bd 00 00 00 00 00 fc ff df 75 07 e8 61 6f 0b 00 eb 38 f3 90 42 0f b6 04 2b <84> c0 75 11 41 f7 04 24 01 00 00 00 74 1e e8 45 6f 0b 00 eb e4 44
RSP: 0000:ffffc90003ac7700 EFLAGS: 00000293
RAX: 0000000000000000 RBX: 1ffff11017108441 RCX: ffff8880313f5ac0
RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000000
RBP: ffffc90003ac7880 R08: ffffffff8f7cd477 R09: 1ffffffff1ef9a8e
R10: dffffc0000000000 R11: fffffbfff1ef9a8f R12: ffff8880b8842208
R13: dffffc0000000000 R14: ffff8880b893b240 R15: 0000000000000000
FS:  00007faeed451880(0000) GS:ffff88812623e000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000563bcd554a38 CR3: 0000000030074000 CR4: 00000000003526f0
Call Trace:
 <TASK>
 on_each_cpu_cond_mask+0x3f/0x80 kernel/smp.c:1043
 __flush_tlb_multi arch/x86/include/asm/paravirt.h:91 [inline]
 flush_tlb_multi arch/x86/mm/tlb.c:1381 [inline]
 flush_tlb_mm_range+0x6b1/0x12d0 arch/x86/mm/tlb.c:1471
 flush_tlb_page arch/x86/include/asm/tlbflush.h:324 [inline]
 ptep_clear_flush+0x120/0x170 mm/pgtable-generic.c:101
 wp_page_copy mm/memory.c:3745 [inline]
 do_wp_page+0x1bc2/0x5800 mm/memory.c:4140
 handle_pte_fault mm/memory.c:6193 [inline]
 __handle_mm_fault+0x1033/0x5400 mm/memory.c:6318
 handle_mm_fault+0x40a/0x8e0 mm/memory.c:6487
 do_user_addr_fault+0xa7c/0x1380 arch/x86/mm/fault.c:1336
 handle_page_fault arch/x86/mm/fault.c:1476 [inline]
 exc_page_fault+0x82/0x100 arch/x86/mm/fault.c:1532
 asm_exc_page_fault+0x26/0x30 arch/x86/include/asm/idtentry.h:618
RIP: 0033:0x7faeed4d8a9a
Code: 5b 5d c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 00 53 48 85 ff 74 2f 48 8b 47 08 48 39 c7 74 21 48 8b 1f 48 39 df 74 19 48 89 18 <48> 89 43 08 e8 8d d9 ff ff 48 89 d8 5b c3 0f 1f 84 00 00 00 00 00
RSP: 002b:00007ffe8bc59400 EFLAGS: 00010202
RAX: 0000563bcd5550b0 RBX: 0000563bcd554a30 RCX: 0000000000000000
RDX: 0000563bcd560430 RSI: 0000563bcd55cf60 RDI: 0000563bcd55a4e0
RBP: 0000563bcd55a4e0 R08: 0000563bcd55cf70 R09: 0000000000000003
R10: 0000000000000000 R11: 0000000000000297 R12: 0000563bc9ad9588
R13: 00007ffe8bc594b0 R14: 0000000000000000 R15: 0000000000000000
 </TASK>