rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: 	1-...!: (2 ticks this GP) idle=edf4/1/0x4000000000000000 softirq=19714/19714 fqs=0
rcu: 	(detected by 0, t=10502 jiffies, g=16897, q=586 ncpus=2)
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 UID: 0 PID: 5852 Comm: udevd Not tainted 6.14.0-rc7-syzkaller-01431-gbfc17c165835 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025
RIP: 0010:__hrtimer_run_queues+0x6e3/0xd30 kernel/time/hrtimer.c:1865
Code: c2 12 00 4c 89 f7 48 8b 74 24 58 31 d2 e8 05 2c 00 00 eb 16 e8 ce c2 12 00 49 bd 00 00 00 00 00 fc ff df eb 0a e8 bd c2 12 00 <48> 8b 5c 24 28 48 8b 74 24 60 42 0f b6 04 2e 84 c0 48 8b 54 24 18
RSP: 0018:ffffc90000a28d40 EFLAGS: 00000082
RAX: 00000000b872c601 RBX: 0000000000000000 RCX: dffffc0000000000
RDX: 0000000000000000 RSI: ffff8880b872c650 RDI: ffff88805d217340
RBP: ffffc90000a28ea0 R08: ffff88805d217357 R09: 0000000000000000
R10: ffff88805d217340 R11: ffffed100ba42e6b R12: 1ffff110170e58cb
R13: dffffc0000000000 R14: ffff88805d217340 R15: ffff8880b872c500
FS:  0000000000000000(0000) GS:ffff8880b8700000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00005642c2093d88 CR3: 000000005d9be000 CR4: 00000000003526f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <NMI>
 </NMI>
 <IRQ>
 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:native_set_pte arch/x86/include/asm/pgtable_64.h:67 [inline]
RIP: 0010:native_pte_clear arch/x86/include/asm/pgtable_64.h:73 [inline]
RIP: 0010:native_local_ptep_get_and_clear arch/x86/include/asm/pgtable.h:1260 [inline]
RIP: 0010:ptep_get_and_clear_full arch/x86/include/asm/pgtable.h:1336 [inline]
RIP: 0010:clear_full_ptes include/linux/pgtable.h:749 [inline]
RIP: 0010:zap_present_folio_ptes mm/memory.c:1523 [inline]
RIP: 0010:zap_present_ptes mm/memory.c:1595 [inline]
RIP: 0010:do_zap_pte_range mm/memory.c:1697 [inline]
RIP: 0010:zap_pte_range mm/memory.c:1741 [inline]
RIP: 0010:zap_pmd_range mm/memory.c:1833 [inline]
RIP: 0010:zap_pud_range mm/memory.c:1862 [inline]
RIP: 0010:zap_p4d_range mm/memory.c:1883 [inline]
RIP: 0010:unmap_page_range+0x16c6/0x4510 mm/memory.c:1904
Code: 80 3c 2b 00 74 08 4c 89 e7 e8 46 8e 1a 00 4c 8b a4 24 20 02 00 00 43 80 3c 2f 00 48 8b 5c 24 10 74 08 48 89 df e8 1a 8f 1a 00 <4c> 89 23 e9 3b 1d 00 00 e8 5d 45 b3 ff bb 01 00 00 00 45 31 e4 e9
RSP: 0018:ffffc90003f8f4e0 EFLAGS: 00000246
RAX: 0000000000000000 RBX: ffff88805f231950 RCX: ffff8880607e3c00
RDX: ffff8880607e3c00 RSI: 0000000000000001 RDI: 0000000000000000
RBP: ffffc90003f8f890 R08: ffffffff820ea9af R09: 1ffffd40005c3628
R10: dffffc0000000000 R11: fffff940005c3629 R12: 0000000000000000
R13: dffffc0000000000 R14: 84000000b86c5805 R15: 1ffff1100be4632a
 unmap_vmas+0x3cc/0x5f0 mm/memory.c:1994
 exit_mmap+0x283/0xd40 mm/mmap.c:1284
 __mmput+0x115/0x420 kernel/fork.c:1356
 exit_mm+0x220/0x310 kernel/exit.c:570
 do_exit+0x9ad/0x2940 kernel/exit.c:925
 do_group_exit+0x207/0x2c0 kernel/exit.c:1087
 __do_sys_exit_group kernel/exit.c:1098 [inline]
 __se_sys_exit_group kernel/exit.c:1096 [inline]
 __x64_sys_exit_group+0x3f/0x40 kernel/exit.c:1096
 x64_sys_call+0x26a8/0x26b0 arch/x86/include/generated/asm/syscalls_64.h:232
 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: 0033:0x7f12ea8fca90
Code: Unable to access opcode bytes at 0x7f12ea8fca66.
RSP: 002b:00007ffcd42ac3e8 EFLAGS: 00000206 ORIG_RAX: 00000000000000e7
RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f12ea8fca90
RDX: 00000000000000e7 RSI: 000000000000003c RDI: 0000000000000000
RBP: 0000000000000000 R08: 0000000000000007 R09: ba47767d35b9cdb1
R10: 00000000ffffffff R11: 0000000000000206 R12: 00005642c2083860
R13: 00007ffcd42ac428 R14: 0000000000000001 R15: 00005642c2079910
 </TASK>
rcu: rcu_preempt kthread timer wakeup didn't happen for 10501 jiffies! g16897 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x402
rcu: 	Possible timer handling issue on cpu=1 timer-softirq=5801
rcu: rcu_preempt kthread starved for 10502 jiffies! g16897 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x402 ->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:I stack:25168 pid:18    tgid:18    ppid:2      task_flags:0x208040 flags:0x00004000
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5378 [inline]
 __schedule+0x190e/0x4c90 kernel/sched/core.c:6765
 __schedule_loop kernel/sched/core.c:6842 [inline]
 schedule+0x14b/0x320 kernel/sched/core.c:6857
 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>