rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: 	Tasks blocked on level-0 rcu_node (CPUs 0-1): P9628/1:b..l
	(detected by 0, t=10502 jiffies, g=50269, q=109 ncpus=2)
task:syz-executor.2  state:R  running task     stack:25464 pid:9628  ppid:4478   flags:0x00004006
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5245 [inline]
 __schedule+0x142d/0x4550 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:653
RIP: 0010:ma_slots lib/maple_tree.c:793 [inline]
RIP: 0010:mtree_lookup_walk lib/maple_tree.c:3940 [inline]
RIP: 0010:mtree_load+0x86f/0xdf0 lib/maple_tree.c:6262
Code: ac 24 80 00 00 00 4c 89 74 24 38 eb 05 e8 99 17 09 f7 48 8b 5c 24 50 48 8b 7c 24 78 48 c7 c6 00 ea 5c 8e e8 e3 1b 09 f7 85 db <49> bd 00 00 00 00 00 fc ff df 4c 8d a4 24 e0 00 00 00 4c 8b 74 24
RSP: 0018:ffffc9001410fb20 EFLAGS: 00000206
RAX: 0000000000000002 RBX: 0000000000000003 RCX: 000000000000008b
RDX: 0000000000000003 RSI: ffffffff8e5cea00 RDI: 0000000000000003
RBP: ffffc9001410fcb0 R08: 0000000000000005 R09: ffffffff8a817bcd
R10: 0000000000000003 R11: ffff888021e95940 R12: 0000000000000000
R13: 0000000000000000 R14: 00007fbf4adfafff R15: ffff888058919a08
 vma_lookup include/linux/mm.h:2865 [inline]
 do_pages_stat_array mm/migrate.c:1916 [inline]
 do_pages_stat mm/migrate.c:1992 [inline]
 kernel_move_pages mm/migrate.c:2079 [inline]
 __do_sys_move_pages mm/migrate.c:2090 [inline]
 __se_sys_move_pages+0x1506/0x19d0 mm/migrate.c:2085
 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: 0033:0x7fbf4b67d0a9
RSP: 002b:00007fbf4c3c00c8 EFLAGS: 00000246 ORIG_RAX: 0000000000000117
RAX: ffffffffffffffda RBX: 00007fbf4b7b3f80 RCX: 00007fbf4b67d0a9
RDX: 0000000020000000 RSI: 20000000000001ab RDI: 0000000000000000
RBP: 00007fbf4b6ec074 R08: 0000000020000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 000000000000000b R14: 00007fbf4b7b3f80 R15: 00007ffc17fce538
 </TASK>
rcu: rcu_preempt kthread starved for 9718 jiffies! g50269 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x0 ->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:R  running task     stack:25624 pid:16    ppid:2      flags:0x00004000
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5245 [inline]
 __schedule+0x142d/0x4550 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:308
 </TASK>
rcu: Stack dump where RCU GP kthread last ran:
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1 skipped: idling at native_safe_halt arch/x86/include/asm/irqflags.h:51 [inline]
NMI backtrace for cpu 1 skipped: idling at arch_safe_halt arch/x86/include/asm/irqflags.h:89 [inline]
NMI backtrace for cpu 1 skipped: idling at acpi_safe_halt drivers/acpi/processor_idle.c:112 [inline]
NMI backtrace for cpu 1 skipped: idling at acpi_idle_do_entry+0x10f/0x340 drivers/acpi/processor_idle.c:572