rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: 	Tasks blocked on level-0 rcu_node (CPUs 0-1): P7242/1:b..l
rcu: 	(detected by 1, t=10503 jiffies, g=33017, q=776 ncpus=2)
task:syz.3.244       state:R  running task     stack:24672 pid:7242  tgid:7242  ppid:6929   flags:0x00004000
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5188 [inline]
 __schedule+0x1800/0x4a60 kernel/sched/core.c:6529
 preempt_schedule_irq+0xfb/0x1c0 kernel/sched/core.c:6851
 irqentry_exit+0x5e/0x90 kernel/entry/common.c:354
 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702
RIP: 0010:mas_validate_limits lib/maple_tree.c:7504 [inline]
RIP: 0010:mt_validate+0x17a3/0x4aa0 lib/maple_tree.c:7590
Code: 83 fd 03 0f 87 2d 05 00 00 e8 b9 1b e7 f5 49 bd 00 00 00 00 00 fc ff df 44 89 f7 48 8b 5c 24 58 89 de e8 60 1d e7 f5 41 39 de <0f> 8d 8d 05 00 00 48 8b 44 24 20 42 80 3c 28 00 74 0d 48 8d bc 24
RSP: 0018:ffffc90002e9f760 EFLAGS: 00000283
RAX: 0000000000000000 RBX: 0000000000000010 RCX: ffff888028b53c00
RDX: ffff888028b53c00 RSI: 0000000000000010 RDI: 000000000000000e
RBP: ffffc90002e9f950 R08: ffffffff8bac6fa0 R09: ffffffff8bac6dd4
R10: 0000000000000003 R11: ffff888028b53c00 R12: 000000000000000d
R13: dffffc0000000000 R14: 000000000000000e R15: 000000000000000f
 validate_mm+0xe7/0x530 mm/mmap.c:329
 mmap_region+0x1a61/0x2090 mm/mmap.c:3071
 do_mmap+0x8f9/0x1010 mm/mmap.c:1468
 vm_mmap_pgoff+0x1dd/0x3d0 mm/util.c:588
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f94b7d79eb3
RSP: 002b:00007ffee61a21f8 EFLAGS: 00000246 ORIG_RAX: 0000000000000009
RAX: ffffffffffffffda RBX: 00007f94b60006c0 RCX: 00007f94b7d79eb3
RDX: 0000000000000000 RSI: 0000000000021000 RDI: 0000000000000000
RBP: 0000000000000000 R08: 00000000ffffffff R09: 0000000000000000
R10: 0000000000020022 R11: 0000000000000246 R12: 00007ffee61a2350
R13: ffffffffffffffc0 R14: 0000000000001000 R15: 0000000000000000
 </TASK>
rcu: rcu_preempt kthread starved for 10538 jiffies! g33017 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:26448 pid:17    tgid:17    ppid:2      flags:0x00004000
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5188 [inline]
 __schedule+0x1800/0x4a60 kernel/sched/core.c:6529
 __schedule_loop kernel/sched/core.c:6606 [inline]
 schedule+0x14b/0x320 kernel/sched/core.c:6621
 schedule_timeout+0x1be/0x310 kernel/time/timer.c:2581
 rcu_gp_fqs_loop+0x2df/0x1330 kernel/rcu/tree.c:2034
 rcu_gp_kthread+0xa7/0x3b0 kernel/rcu/tree.c:2236
 kthread+0x2f2/0x390 kernel/kthread.c:389
 ret_from_fork+0x4d/0x80 arch/x86/kernel/process.c:147
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244
 </TASK>
rcu: Stack dump where RCU GP kthread last ran:
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0 skipped: idling at native_safe_halt arch/x86/include/asm/irqflags.h:48 [inline]
NMI backtrace for cpu 0 skipped: idling at arch_safe_halt arch/x86/include/asm/irqflags.h:106 [inline]
NMI backtrace for cpu 0 skipped: idling at acpi_safe_halt+0x21/0x30 drivers/acpi/processor_idle.c:111