rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: 	0-...!: (0 ticks this GP) idle=800c/1/0x4000000000000000 softirq=36329/36329 fqs=0
rcu: 	(detected by 1, t=10502 jiffies, g=29277, q=199 ncpus=2)
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 UID: 0 PID: 9166 Comm: syz.4.931 Not tainted 6.15.0-syzkaller-09113-g8477ab143069 #0 PREEMPT(full) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025
RIP: 0010:__lock_acquire+0x2e1/0xd20 kernel/locking/lockdep.c:5179
Code: fa 10 31 f6 85 d2 40 0f 95 c6 31 d2 83 bf d4 0a 00 00 00 0f 95 c2 c1 e2 0d c1 e6 0e 09 d6 8b 54 24 1c c1 e2 0f 0f b7 d2 09 f2 <41> 83 e4 03 41 c1 e4 10 41 09 d4 8b 54 24 0c 83 e2 01 c1 e2 12 44
RSP: 0018:ffffc90000007ad0 EFLAGS: 00000006
RAX: 0000000000000014 RBX: ffffffff99c80140 RCX: 0000000000000000
RDX: 0000000000004000 RSI: 0000000000004000 RDI: ffff88802c181e00
RBP: 0000000000000000 R08: 0000000000000000 R09: ffffffff84beaafa
R10: ffffc90000007cb0 R11: fffff52000000f98 R12: 0000000000000000
R13: 0000000000000000 R14: 0000000000000000 R15: ffff88802c1828f0
FS:  0000000000000000(0000) GS:ffff888125c99000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f8e0a97d2d8 CR3: 000000005f5b0000 CR4: 00000000003526f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <IRQ>
 lock_acquire+0x120/0x360 kernel/locking/lockdep.c:5871
 __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [inline]
 _raw_spin_lock_irqsave+0xa7/0xf0 kernel/locking/spinlock.c:162
 debug_object_deactivate+0x9a/0x250 lib/debugobjects.c:873
 debug_hrtimer_deactivate kernel/time/hrtimer.c:450 [inline]
 debug_deactivate+0x1d/0x200 kernel/time/hrtimer.c:490
 __run_hrtimer kernel/time/hrtimer.c:1729 [inline]
 __hrtimer_run_queues+0x2b0/0xc60 kernel/time/hrtimer.c:1825
 hrtimer_interrupt+0x45b/0xaa0 kernel/time/hrtimer.c:1887
 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1039 [inline]
 __sysvec_apic_timer_interrupt+0x10b/0x410 arch/x86/kernel/apic/apic.c:1056
 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1050 [inline]
 sysvec_apic_timer_interrupt+0xa1/0xc0 arch/x86/kernel/apic/apic.c:1050
 </IRQ>
 <TASK>
 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702
RIP: 0010:do_zap_pte_range mm/memory.c:-1 [inline]
RIP: 0010:zap_pte_range mm/memory.c:1731 [inline]
RIP: 0010:zap_pmd_range mm/memory.c:1823 [inline]
RIP: 0010:zap_pud_range mm/memory.c:1852 [inline]
RIP: 0010:zap_p4d_range mm/memory.c:1873 [inline]
RIP: 0010:unmap_page_range+0xe8b/0x4580 mm/memory.c:1894
Code: 89 74 24 50 0f 84 18 03 00 00 e8 40 6c b8 ff 4c 89 a4 24 98 00 00 00 44 89 e0 4c 8d 24 c3 48 c1 e0 0c 4c 01 f8 48 89 44 24 58 <4c> 8b 7c 24 28 4c 89 fe 48 81 e6 01 01 00 00 31 ff e8 ef 70 b8 ff
RSP: 0018:ffffc9000aed7660 EFLAGS: 00000293
RAX: ffffffff8207cf60 RBX: ffff88802f169e70 RCX: ffff88802c181e00
RDX: 0000000000000000 RSI: 800000006b8a4007 RDI: 0000000000000000
RBP: ffffc9000aed7910 R08: ffffea0001ae28f3 R09: 1ffffd400035c51e
R10: dffffc0000000000 R11: fffff9400035c51f R12: ffff88802f169e70
R13: dffffc0000000000 R14: 00007f2a69dce000 R15: 00007f2a69dce000
 unmap_vmas+0x25d/0x3c0 mm/memory.c:1984
 exit_mmap+0x245/0xba0 mm/mmap.c:1284
 __mmput+0x118/0x420 kernel/fork.c:1381
 exit_mm+0x1da/0x2c0 kernel/exit.c:595
 do_exit+0x864/0x2550 kernel/exit.c:947
 __do_sys_exit kernel/exit.c:1075 [inline]
 __se_sys_exit kernel/exit.c:1073 [inline]
 __x64_sys_exit+0x40/0x40 kernel/exit.c:1073
 x64_sys_call+0x21a3/0x21c0 arch/x86/include/generated/asm/syscalls_64.h:61
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0xfa/0x3b0 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f2a6ab8e969
Code: Unable to access opcode bytes at 0x7f2a6ab8e93f.
RSP: 002b:00007f2a6bac3fe8 EFLAGS: 00000246 ORIG_RAX: 000000000000003c
RAX: ffffffffffffffda RBX: 00007f2a6adb5fa0 RCX: 00007f2a6ab8e969
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 00007f2a6ac10ab1 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007f2a6adb5fa0 R15: 00007ffd900904f8
 </TASK>
rcu: rcu_preempt kthread timer wakeup didn't happen for 10501 jiffies! g29277 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x402
rcu: 	Possible timer handling issue on cpu=0 timer-softirq=24619
rcu: rcu_preempt kthread starved for 10502 jiffies! g29277 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:26024 pid:16    tgid:16    ppid:2      task_flags:0x208040 flags:0x00004000
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5392 [inline]
 __schedule+0x16a2/0x4cb0 kernel/sched/core.c:6781
 __schedule_loop kernel/sched/core.c:6859 [inline]
 schedule+0x165/0x360 kernel/sched/core.c:6874
 schedule_timeout+0x12b/0x270 kernel/time/sleep_timeout.c:99
 rcu_gp_fqs_loop+0x301/0x1540 kernel/rcu/tree.c:2054
 rcu_gp_kthread+0x99/0x390 kernel/rcu/tree.c:2256
 kthread+0x70e/0x8a0 kernel/kthread.c:464
 ret_from_fork+0x3fc/0x770 arch/x86/kernel/process.c:148
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
 </TASK>