rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: 	0-...!: (2 ticks this GP) idle=f164/1/0x4000000000000000 softirq=24180/24180 fqs=0
rcu: 	(detected by 1, t=10504 jiffies, g=15637, q=1290 ncpus=2)
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 UID: 0 PID: 6544 Comm: rm Not tainted 6.15.0-rc6-syzkaller-gb8fa067c4a76 #0 PREEMPT(full) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025
RIP: 0010:trace_lock_release include/trace/events/lock.h:69 [inline]
RIP: 0010:lock_release+0x4b/0x3e0 kernel/locking/lockdep.c:5877
Code: 89 44 24 28 0f 1f 44 00 00 65 8b 05 93 4f d8 10 83 f8 08 0f 83 9a 02 00 00 89 c0 48 0f a3 05 bc 25 e1 0d 73 16 e8 c5 c8 08 00 <84> c0 75 0d f6 05 2d 1a cb 0d 01 0f 84 ad 02 00 00 83 3d 7d 54 e1
RSP: 0018:ffffc90000007b78 EFLAGS: 00000002
RAX: 0000000000000001 RBX: 0000000000000802 RCX: 49e4bbd4fa724e00
RDX: 0000000000000001 RSI: ffffffff8bc1dbc0 RDI: ffffffff8bc1db80
RBP: ffffc90000007c78 R08: 0000000000000003 R09: 0000000000000004
R10: dffffc0000000000 R11: fffff52000000f6c R12: dffffc0000000000
R13: ffffffff84beb5f2 R14: ffffffff99a40560 R15: 1ffff92000000f7c
FS:  0000000000000000(0000) GS:ffff8881260b6000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fff60bc0ebc CR3: 000000003152e000 CR4: 00000000003526f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <IRQ>
 __raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:149 [inline]
 _raw_spin_unlock_irqrestore+0x70/0x110 kernel/locking/spinlock.c:194
 debug_object_activate+0x2e2/0x420 lib/debugobjects.c:836
 debug_hrtimer_activate kernel/time/hrtimer.c:445 [inline]
 debug_activate kernel/time/hrtimer.c:484 [inline]
 enqueue_hrtimer+0x30/0x3a0 kernel/time/hrtimer.c:1088
 __run_hrtimer kernel/time/hrtimer.c:1778 [inline]
 __hrtimer_run_queues+0x656/0xc60 kernel/time/hrtimer.c:1825
 hrtimer_interrupt+0x45b/0xaa0 kernel/time/hrtimer.c:1887
 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1038 [inline]
 __sysvec_apic_timer_interrupt+0x108/0x410 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:mas_validate_gaps lib/maple_tree.c:7284 [inline]
RIP: 0010:mt_validate+0x2aa3/0x4380 lib/maple_tree.c:7564
Code: 48 c1 e8 03 48 b9 00 00 00 00 00 fc ff df 80 3c 08 00 74 08 4c 89 f7 e8 3b cd d0 f6 4d 8b 36 e9 12 f9 ff ff 44 89 f9 80 e1 07 <38> c1 0f 8c 1a f8 ff ff 4c 89 ff e8 8d cc d0 f6 e9 0d f8 ff ff 89
RSP: 0018:ffffc900040df180 EFLAGS: 00000202
RAX: 0000000000000004 RBX: ffffffff8c970e21 RCX: 000000008c970e01
RDX: ffff888031c99e00 RSI: 0000000000000001 RDI: 0000000000000004
RBP: ffffc900040df350 R08: ffff888031c99e00 R09: 0000000000000004
R10: 0000000000000003 R11: 0000000000000000 R12: 0000000000000000
R13: 0000000000000000 R14: 0000000000000001 R15: ffffffff8c970e81
 validate_mm+0xb6/0x4b0 mm/vma.c:595
 __split_vma+0x867/0x9b0 mm/vma.c:524
 vms_gather_munmap_vmas+0x4ab/0x12b0 mm/vma.c:1336
 __mmap_prepare mm/vma.c:2303 [inline]
 __mmap_region mm/vma.c:2506 [inline]
 mmap_region+0x5f5/0x1e50 mm/vma.c:2597
 do_mmap+0xc68/0x1100 mm/mmap.c:561
 vm_mmap_pgoff+0x31b/0x4c0 mm/util.c:579
 ksys_mmap_pgoff+0x51f/0x760 mm/mmap.c:607
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0xf6/0x210 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f1ec1c1f242
Code: 08 00 04 00 00 eb e2 90 41 f7 c1 ff 0f 00 00 75 27 55 89 cd 53 48 89 fb 48 85 ff 74 33 41 89 ea 48 89 df b8 09 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 5e 5b 5d c3 0f 1f 00 c7 05 46 40 01 00 16 00
RSP: 002b:00007fff60bc0b18 EFLAGS: 00000206 ORIG_RAX: 0000000000000009
RAX: ffffffffffffffda RBX: 00007f1ec1b41000 RCX: 00007f1ec1c1f242
RDX: 0000000000000005 RSI: 0000000000086000 RDI: 00007f1ec1b41000
RBP: 0000000000000812 R08: 0000000000000003 R09: 0000000000010000
R10: 0000000000000812 R11: 0000000000000206 R12: 00007fff60bc0b68
R13: 00007f1ec1bf30c0 R14: 00007fff60bc0f20 R15: 00000fffec178166
 </TASK>
rcu: rcu_preempt kthread timer wakeup didn't happen for 10503 jiffies! g15637 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x402
rcu: 	Possible timer handling issue on cpu=0 timer-softirq=4817
rcu: rcu_preempt kthread starved for 10504 jiffies! g15637 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:27304 pid:16    tgid:16    ppid:2      task_flags:0x208040 flags:0x00004000
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5382 [inline]
 __schedule+0x16e2/0x4cd0 kernel/sched/core.c:6767
 __schedule_loop kernel/sched/core.c:6845 [inline]
 schedule+0x165/0x360 kernel/sched/core.c:6860
 schedule_timeout+0x12b/0x270 kernel/time/sleep_timeout.c:99
 rcu_gp_fqs_loop+0x301/0x1540 kernel/rcu/tree.c:2046
 rcu_gp_kthread+0x99/0x390 kernel/rcu/tree.c:2248
 kthread+0x711/0x8a0 kernel/kthread.c:464
 ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:153
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
 </TASK>