rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: 	0-...!: (0 ticks this GP) idle=e244/1/0x4000000000000000 softirq=26511/26511 fqs=0
rcu: 	(detected by 1, t=10505 jiffies, g=23165, q=3496 ncpus=2)
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 UID: 0 PID: 9129 Comm: syz.0.794 Not tainted 6.13.0-rc1-syzkaller-00001-ge70140ba0d2b #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024
RIP: 0010:check_preemption_disabled+0x3/0xe0 lib/smp_processor_id.c:13
Code: 65 8b 05 cc b9 d8 74 85 c0 74 04 90 0f 0b 90 e9 53 fc ff ff 0f 1f 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 41 54 55 <53> 48 83 ec 08 65 8b 1d 1d 0a da 74 65 8b 05 12 0a da 74 a9 ff ff
RSP: 0018:ffffc90000007cc0 EFLAGS: 00000007
RAX: 0000000000000001 RBX: 0000000000000000 RCX: ffffffff8175ceec
RDX: fffffbfff20be083 RSI: ffffffff8bd1b3e0 RDI: ffffffff8bd1b420
RBP: 0000000000000000 R08: 0000000000000000 R09: fffffbfff20be082
R10: ffffffff905f0417 R11: 0000000000000004 R12: 0000000000000000
R13: 000000000003d90c R14: 0000000000000000 R15: 0000000000000000
FS:  00007f73736306c0(0000) GS:ffff8880b8600000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000000000 CR3: 000000005ec5e000 CR4: 00000000003526f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <NMI>
 </NMI>
 <IRQ>
 rcu_is_watching_curr_cpu include/linux/context_tracking.h:128 [inline]
 rcu_is_watching+0x12/0xc0 kernel/rcu/tree.c:737
 trace_lock_acquire+0x14e/0x1f0 include/trace/events/lock.h:24
 lock_acquire+0x2f/0xb0 kernel/locking/lockdep.c:5820
 rcu_lock_acquire include/linux/rcupdate.h:337 [inline]
 rcu_read_lock include/linux/rcupdate.h:849 [inline]
 advance_sched+0x67f/0xc60 net/sched/sch_taprio.c:985
 __run_hrtimer kernel/time/hrtimer.c:1739 [inline]
 __hrtimer_run_queues+0x20a/0xae0 kernel/time/hrtimer.c:1803
 hrtimer_interrupt+0x392/0x8e0 kernel/time/hrtimer.c:1865
 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1038 [inline]
 __sysvec_apic_timer_interrupt+0x10f/0x400 arch/x86/kernel/apic/apic.c:1055
 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1049 [inline]
 sysvec_apic_timer_interrupt+0x9f/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:lock_acquire.part.0+0x155/0x380 kernel/locking/lockdep.c:5814
Code: b8 ff ff ff ff 65 0f c1 05 f0 cf 8b 7e 83 f8 01 0f 85 d0 01 00 00 9c 58 f6 c4 02 0f 85 e5 01 00 00 48 85 ed 0f 85 b6 01 00 00 <48> b8 00 00 00 00 00 fc ff df 48 01 c3 48 c7 03 00 00 00 00 48 c7
RSP: 0018:ffffc9001c1173b8 EFLAGS: 00000206
RAX: 0000000000000046 RBX: 1ffff92003822e78 RCX: 000000009c12069b
RDX: 0000000000000001 RSI: ffffffff8b6cdb40 RDI: ffffffff8bd1b460
RBP: 0000000000000200 R08: 0000000000000000 R09: fffffbfff2dca598
R10: ffffffff96e52cc7 R11: 0000000000000003 R12: 0000000000000000
R13: ffffffff8e1bb440 R14: 0000000000000000 R15: 0000000000000000
 rcu_lock_acquire include/linux/rcupdate.h:337 [inline]
 rcu_read_lock_sched include/linux/rcupdate.h:941 [inline]
 pfn_valid include/linux/mmzone.h:2048 [inline]
 page_table_check_clear mm/page_table_check.c:70 [inline]
 __page_table_check_pte_clear+0x1c0/0x580 mm/page_table_check.c:169
 page_table_check_pte_clear include/linux/page_table_check.h:49 [inline]
 ptep_get_and_clear_full arch/x86/include/asm/pgtable.h:1337 [inline]
 get_and_clear_full_ptes include/linux/pgtable.h:705 [inline]
 zap_present_folio_ptes mm/memory.c:1502 [inline]
 zap_present_ptes mm/memory.c:1585 [inline]
 zap_pte_range mm/memory.c:1627 [inline]
 zap_pmd_range mm/memory.c:1753 [inline]
 zap_pud_range mm/memory.c:1782 [inline]
 zap_p4d_range mm/memory.c:1803 [inline]
 unmap_page_range+0x22f6/0x3d60 mm/memory.c:1824
 unmap_single_vma+0x194/0x2b0 mm/memory.c:1870
 unmap_vmas+0x22f/0x490 mm/memory.c:1914
 exit_mmap+0x1c6/0xb20 mm/mmap.c:1667
 __mmput+0x12a/0x4c0 kernel/fork.c:1353
 mmput+0x62/0x70 kernel/fork.c:1375
 copy_process+0x2b24/0x8df0 kernel/fork.c:2656
 kernel_clone+0xfd/0x960 kernel/fork.c:2807
 __do_sys_clone+0xba/0x100 kernel/fork.c:2950
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0xcd/0x250 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f737277ff19
Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 a8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f7373630008 EFLAGS: 00000206 ORIG_RAX: 0000000000000038
RAX: ffffffffffffffda RBX: 00007f7372946080 RCX: 00007f737277ff19
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000040000000
RBP: 00007f73727f3986 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000206 R12: 0000000000000000
R13: 0000000000000000 R14: 00007f7372946080 R15: 00007ffe68398828
 </TASK>
rcu: rcu_preempt kthread timer wakeup didn't happen for 10504 jiffies! g23165 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x402
rcu: 	Possible timer handling issue on cpu=0 timer-softirq=17288
rcu: rcu_preempt kthread starved for 10505 jiffies! g23165 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x402 ->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:I stack:27600 pid:17    tgid:17    ppid:2      flags:0x00004000
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5369 [inline]
 __schedule+0xe58/0x5ad0 kernel/sched/core.c:6756
 __schedule_loop kernel/sched/core.c:6833 [inline]
 schedule+0xe7/0x350 kernel/sched/core.c:6848
 schedule_timeout+0x124/0x280 kernel/time/sleep_timeout.c:99
 rcu_gp_fqs_loop+0x1eb/0xb00 kernel/rcu/tree.c:2045
 rcu_gp_kthread+0x271/0x380 kernel/rcu/tree.c:2247
 kthread+0x2c1/0x3a0 kernel/kthread.c:389
 ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:147
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244
 </TASK>