rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: 	Tasks blocked on level-0 rcu_node (CPUs 0-1): P9585/1:b..l
rcu: 	(detected by 0, t=10502 jiffies, g=37273, q=262 ncpus=2)
task:syz.4.1421      state:R  running task     stack:27168 pid:9585  tgid:9585  ppid:5086   flags:0x00000000
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5407 [inline]
 __schedule+0xf27/0x5d10 kernel/sched/core.c:6748
 preempt_schedule_irq+0x51/0x90 kernel/sched/core.c:7070
 irqentry_exit+0x36/0x90 kernel/entry/common.c:354
 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702
RIP: 0010:__sanitizer_cov_trace_pc+0x33/0x60 kernel/kcov.c:207
Code: bf 75 7e 65 8b 05 55 bf 75 7e a9 00 01 ff 00 48 8b 34 24 74 0f f6 c4 01 74 35 8b 82 1c 16 00 00 85 c0 74 2b 8b 82 f8 15 00 00 <83> f8 02 75 20 48 8b 8a 00 16 00 00 8b 92 fc 15 00 00 48 8b 01 48
RSP: 0018:ffffc9000315f848 EFLAGS: 00000246
RAX: 0000000000000000 RBX: 0000000000000004 RCX: ffffffff8ad608d0
RDX: ffff8880670a9e00 RSI: ffffffff8ad608e9 RDI: 0000000000000007
RBP: ffff888011dd8a06 R08: 0000000000000007 R09: 0000000000000000
R10: 0000000000000002 R11: 0000000000000001 R12: 0000000000000003
R13: 0000000000000000 R14: 0000000000000009 R15: ffff8880257e5000
 mte_parent_slot lib/maple_tree.c:532 [inline]
 mas_validate_gaps lib/maple_tree.c:7372 [inline]
 mt_validate+0x2f99/0x4390 lib/maple_tree.c:7596
 validate_mm+0x9c/0x4b0 mm/mmap.c:288
 __split_vma+0xc99/0x11c0 mm/mmap.c:2440
 split_vma mm/mmap.c:2466 [inline]
 vma_modify+0x1ec/0x360 mm/mmap.c:2500
 vma_modify_flags include/linux/mm.h:3352 [inline]
 mprotect_fixup+0x220/0xc40 mm/mprotect.c:637
 do_mprotect_pkey+0x9d7/0xd70 mm/mprotect.c:820
 __do_sys_mprotect mm/mprotect.c:841 [inline]
 __se_sys_mprotect mm/mprotect.c:838 [inline]
 __x64_sys_mprotect+0x78/0xc0 mm/mprotect.c:838
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0xcd/0x250 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f4947575ad7
RSP: 002b:00007fff6f567028 EFLAGS: 00000206 ORIG_RAX: 000000000000000a
RAX: ffffffffffffffda RBX: 00007f49483336c0 RCX: 00007f4947575ad7
RDX: 0000000000000003 RSI: 0000000000020000 RDI: 00007f4948314000
RBP: 0000000000000000 R08: 00000000ffffffff R09: 0000000000000000
R10: 0000000000021000 R11: 0000000000000206 R12: 00007fff6f567280
R13: ffffffffffffffc0 R14: 0000000000001000 R15: 0000000000000000
 </TASK>
rcu: rcu_preempt kthread starved for 10532 jiffies! g37273 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:27312 pid:17    tgid:17    ppid:2      flags:0x00004000
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5407 [inline]
 __schedule+0xf27/0x5d10 kernel/sched/core.c:6748
 __schedule_loop kernel/sched/core.c:6825 [inline]
 schedule+0xe7/0x350 kernel/sched/core.c:6840
 schedule_timeout+0x136/0x2a0 kernel/time/timer.c:2581
 rcu_gp_fqs_loop+0x1eb/0xb00 kernel/rcu/tree.c:2034
 rcu_gp_kthread+0x271/0x380 kernel/rcu/tree.c:2236
 kthread+0x2c1/0x3a0 kernel/kthread.c:389
 ret_from_fork+0x45/0x80 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 0 to CPUs 1:
NMI backtrace for cpu 1 skipped: idling at native_safe_halt arch/x86/include/asm/irqflags.h:48 [inline]
NMI backtrace for cpu 1 skipped: idling at arch_safe_halt arch/x86/include/asm/irqflags.h:106 [inline]
NMI backtrace for cpu 1 skipped: idling at acpi_safe_halt+0x1a/0x20 drivers/acpi/processor_idle.c:111