rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
	(detected by 1, t=10506 jiffies, g=25413, q=48 ncpus=2)
rcu: All QSes seen, last rcu_preempt kthread activity 10506 (4294993981-4294983475), jiffies_till_next_fqs=1, root ->qsmask 0x0
rcu: rcu_preempt kthread starved for 10506 jiffies! g25413 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:26712 pid:16    ppid:2      flags:0x00004000
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5241 [inline]
 __schedule+0x132c/0x4330 kernel/sched/core.c:6554
 schedule+0xbf/0x180 kernel/sched/core.c:6630
 schedule_timeout+0x1b9/0x300 kernel/time/timer.c:1935
 rcu_gp_fqs_loop+0x2c2/0x1010 kernel/rcu/tree.c:1661
 rcu_gp_kthread+0xa3/0x3a0 kernel/rcu/tree.c:1860
 kthread+0x26e/0x300 kernel/kthread.c:376
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:306
 </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 PID: 6435 Comm: syz-executor.5 Not tainted 6.1.38-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/03/2023
RIP: 0010:rb_erase_cached include/linux/rbtree.h:124 [inline]
RIP: 0010:timerqueue_del+0x8a/0xf0 lib/timerqueue.c:57
Code: 2f 00 74 08 48 89 df e8 14 fa 61 f7 4c 39 2b 74 07 e8 4a 94 0b f7 eb 25 e8 43 94 0b f7 4c 89 ef e8 cb 86 ff ff 41 80 3c 2f 00 <74> 0e 48 89 df 49 89 c7 e8 69 fa 61 f7 4c 89 f8 48 89 03 4c 89 ef
RSP: 0018:ffffc90000007d28 EFLAGS: 00000046
RAX: 0000000000000000 RBX: ffff8880b982a718 RCX: ffff8880289ebb80
RDX: 0000000080010001 RSI: ffff88807523b340 RDI: ffff88807523b340
RBP: dffffc0000000000 R08: ffffffff8a7e46c4 R09: fffffbfff1ca6a76
R10: 0000000000000000 R11: dffffc0000000001 R12: 1ffff1100ea47668
R13: ffff88807523b340 R14: ffff8880b982a710 R15: 1ffff110173054e3
FS:  0000000000000000(0000) GS:ffff8880b9800000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000000000 CR3: 0000000083f9b000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <NMI>
 </NMI>
 <IRQ>
 __remove_hrtimer kernel/time/hrtimer.c:1116 [inline]
 __run_hrtimer kernel/time/hrtimer.c:1665 [inline]
 __hrtimer_run_queues+0x409/0xe50 kernel/time/hrtimer.c:1749
 hrtimer_interrupt+0x392/0x980 kernel/time/hrtimer.c:1811
 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1095 [inline]
 __sysvec_apic_timer_interrupt+0x156/0x580 arch/x86/kernel/apic/apic.c:1112
 sysvec_apic_timer_interrupt+0x8c/0xb0 arch/x86/kernel/apic/apic.c:1106
 </IRQ>
 <TASK>
 asm_sysvec_apic_timer_interrupt+0x16/0x20 arch/x86/include/asm/idtentry.h:649
RIP: 0010:free_pages_and_swap_cache+0x49/0x90 mm/swap_state.c:313
Code: 73 b2 ff 45 85 f6 7e 4e 44 89 f0 4c 8d 3c c5 f8 ff ff ff 31 ed 49 bc 00 00 00 00 00 fc ff df 48 8d 3c 2b 48 89 f8 48 c1 e8 03 <42> 80 3c 20 00 74 05 e8 3b d5 08 00 48 8b 3c 2b e8 a2 f6 ff ff 49
RSP: 0018:ffffc9000549f2c0 EFLAGS: 00000a06
RAX: 1ffff11005134ac6 RBX: ffff8880289a5010 RCX: ffff8880289ebb80
RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffff8880289a5630
RBP: 0000000000000620 R08: ffffffff81d7636a R09: fffff940001bd9a1
R10: 0000000000000000 R11: dffffc0000000001 R12: dffffc0000000000
R13: ffff8880289a5010 R14: 00000000000001fe R15: 0000000000000fe8
 tlb_batch_pages_flush mm/mmu_gather.c:59 [inline]
 tlb_flush_mmu_free mm/mmu_gather.c:254 [inline]
 tlb_flush_mmu+0xfc/0x210 mm/mmu_gather.c:261
 zap_pte_range mm/memory.c:1515 [inline]
 zap_pmd_range mm/memory.c:1564 [inline]
 zap_pud_range mm/memory.c:1593 [inline]
 zap_p4d_range mm/memory.c:1614 [inline]
 unmap_page_range+0x217c/0x2740 mm/memory.c:1635
 unmap_vmas+0x3c4/0x560 mm/memory.c:1720
 exit_mmap+0x252/0x9f0 mm/mmap.c:3213
 __mmput+0x115/0x3c0 kernel/fork.c:1191
 exit_mm+0x226/0x300 kernel/exit.c:563
 do_exit+0x67e/0x2300 kernel/exit.c:856
 do_group_exit+0x202/0x2b0 kernel/exit.c:1019
 get_signal+0x16f7/0x17d0 kernel/signal.c:2858
 arch_do_signal_or_restart+0xb0/0x1a10 arch/x86/kernel/signal.c:869
 exit_to_user_mode_loop+0x6a/0x100 kernel/entry/common.c:168
 exit_to_user_mode_prepare+0xb1/0x140 kernel/entry/common.c:204
 __syscall_exit_to_user_mode_work kernel/entry/common.c:286 [inline]
 syscall_exit_to_user_mode+0x60/0x270 kernel/entry/common.c:297
 do_syscall_64+0x49/0xb0 arch/x86/entry/common.c:86
 entry_SYSCALL_64_after_hwframe+0x63/0xcd
RIP: 0033:0x7ff4d467cb29
Code: Unable to access opcode bytes at 0x7ff4d467caff.
RSP: 002b:00007ff4d5382178 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca
RAX: 0000000000000001 RBX: 00007ff4d479bf88 RCX: 00007ff4d467cb29
RDX: 00000000000f4240 RSI: 0000000000000081 RDI: 00007ff4d479bf8c
RBP: 00007ff4d479bf80 R08: 0000000000000010 R09: 00007ff4d53826c0
R10: ffffffffffffffff R11: 0000000000000246 R12: 00007ff4d479bf8c
R13: 000000000000000b R14: 00007ffc035ca3e0 R15: 00007ffc035ca4c8
 </TASK>