rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: 	Tasks blocked on level-0 rcu_node (CPUs 0-1): P5475/1:b..l
	(detected by 0, t=10502 jiffies, g=18841, q=606 ncpus=2)
task:rm              state:R  running task     stack:23176 pid:5475  ppid:5430   flags:0x00004000
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5241 [inline]
 __schedule+0x143f/0x4570 kernel/sched/core.c:6558
 preempt_schedule_irq+0xf7/0x1c0 kernel/sched/core.c:6870
 irqentry_exit+0x53/0x80 kernel/entry/common.c:439
 asm_sysvec_apic_timer_interrupt+0x16/0x20 arch/x86/include/asm/idtentry.h:691
RIP: 0010:lock_is_held_type+0x1c/0x180 kernel/locking/lockdep.c:5690
Code: fd ff ff 66 2e 0f 1f 84 00 00 00 00 00 90 55 41 57 41 56 41 55 41 54 53 48 83 ec 10 65 48 8b 04 25 28 00 00 00 48 89 44 24 08 <bd> ff ff ff ff 83 3d 4c 86 e8 03 00 0f 84 00 01 00 00 65 8b 05 8b
RSP: 0018:ffffc900060ef5b8 EFLAGS: 00000286
RAX: f0767c7359523f00 RBX: 0000000000000300 RCX: dffffc0000000000
RDX: ffff88807abdb480 RSI: 00000000ffffffff RDI: ffff88807abdb5d8
RBP: ffffc900060ef7f0 R08: ffffffff8aa9a299 R09: 0000000000000003
R10: ffffffffffffffff R11: dffffc0000000001 R12: ffff888053f38c58
R13: ffff888053f38e0c R14: 0000000000000001 R15: ffffc900060ef758
 mt_slot lib/maple_tree.c:814 [inline]
 mas_slot lib/maple_tree.c:847 [inline]
 mas_validate_parent_slot lib/maple_tree.c:7058 [inline]
 mt_validate+0x1401/0x5ad0 lib/maple_tree.c:7247
 validate_mm_mt+0x165/0x670 mm/mmap.c:294
 validate_mm+0x16e/0x380 mm/mmap.c:331
 mmap_region+0x1556/0x2660 mm/mmap.c:2910
 do_mmap+0x8c5/0xf60 mm/mmap.c:1424
 vm_mmap_pgoff+0x1ca/0x2d0 mm/util.c:520
 ksys_mmap_pgoff+0x4f5/0x6d0 mm/mmap.c:1470
 do_syscall_x64 arch/x86/entry/common.c:51 [inline]
 do_syscall_64+0x3b/0xb0 arch/x86/entry/common.c:81
 entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7fdf63f3eb74
RSP: 002b:00007ffe9c4482b8 EFLAGS: 00000246 ORIG_RAX: 0000000000000009
RAX: ffffffffffffffda RBX: 00007ffe9c4482f8 RCX: 00007fdf63f3eb74
RDX: 0000000000000005 RSI: 000000000002c000 RDI: 00007fdf63c23000
RBP: 00007ffe9c448650 R08: 0000000000000003 R09: 0000000000002000
R10: 0000000000000812 R11: 0000000000000246 R12: 00007fdf63f22570
R13: 00007ffe9c4486d8 R14: 0000000000001fd8 R15: 0000000000000000
 </TASK>
rcu: rcu_preempt kthread starved for 7930 jiffies! g18841 f0x0 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:25528 pid:16    ppid:2      flags:0x00004000
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5241 [inline]
 __schedule+0x143f/0x4570 kernel/sched/core.c:6558
 schedule+0xbf/0x180 kernel/sched/core.c:6634
 schedule_timeout+0x1b9/0x300 kernel/time/timer.c:1965
 rcu_gp_fqs_loop+0x2d2/0x1150 kernel/rcu/tree.c:1706
 rcu_gp_kthread+0xa3/0x3b0 kernel/rcu/tree.c:1905
 kthread+0x28d/0x320 kernel/kthread.c:376
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295
 </TASK>
rcu: Stack dump where RCU GP kthread last ran:
CPU: 0 PID: 0 Comm: swapper/0 Not tainted 6.1.128-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 12/27/2024
RIP: 0010:native_save_fl arch/x86/include/asm/irqflags.h:22 [inline]
RIP: 0010:arch_local_save_flags arch/x86/include/asm/irqflags.h:70 [inline]
RIP: 0010:arch_irqs_disabled arch/x86/include/asm/irqflags.h:130 [inline]
RIP: 0010:acpi_safe_halt drivers/acpi/processor_idle.c:112 [inline]
RIP: 0010:acpi_idle_do_entry+0x10f/0x340 drivers/acpi/processor_idle.c:567
Code: 6a cd f6 48 83 e3 08 0f 85 0b 01 00 00 4c 8d 74 24 20 e8 b4 26 d4 f6 0f 1f 44 00 00 e8 1a 66 cd f6 0f 00 2d d3 67 ab 00 fb f4 <4c> 89 f3 48 c1 eb 03 42 80 3c 3b 00 74 08 4c 89 f7 e8 6b f9 24 f7
RSP: 0018:ffffffff8d007b20 EFLAGS: 000002d3
RAX: ffffffff8abd3686 RBX: 0000000000000000 RCX: ffffffff8d0bd8c0
RDX: 0000000000000000 RSI: ffffffff8b0c0340 RDI: ffffffff8b5e6980
RBP: ffffffff8d007bb0 R08: ffffffff8abd3668 R09: fffffbfff1a17b19
R10: 0000000000000000 R11: dffffc0000000001 R12: 1ffffffff1a00f64
R13: ffff888019f5f004 R14: ffffffff8d007b40 R15: dffffc0000000000
FS:  0000000000000000(0000) GS:ffff8880b8e00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fd56a7dd866 CR3: 000000007bef9000 CR4: 00000000003526f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <IRQ>
 </IRQ>
 <TASK>
 acpi_idle_enter+0x352/0x4f0 drivers/acpi/processor_idle.c:704
 cpuidle_enter_state+0x516/0xf80 drivers/cpuidle/cpuidle.c:239
 cpuidle_enter+0x59/0x90 drivers/cpuidle/cpuidle.c:356
 call_cpuidle kernel/sched/idle.c:155 [inline]
 cpuidle_idle_call kernel/sched/idle.c:236 [inline]
 do_idle+0x3ce/0x680 kernel/sched/idle.c:303
 cpu_startup_entry+0x3d/0x60 kernel/sched/idle.c:401
 rest_init+0x2da/0x300 init/main.c:733
 arch_call_rest_init+0xa/0xa init/main.c:893
 start_kernel+0x496/0x53f init/main.c:1140
 secondary_startup_64_no_verify+0xcf/0xdb
 </TASK>