rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: 	Tasks blocked on level-0 rcu_node (CPUs 0-1): P19534/1:b..l
rcu: 	(detected by 1, t=10502 jiffies, g=163401, q=750 ncpus=2)
task:syz-executor.2  state:R  running task     stack:27360 pid:19534 tgid:19533 ppid:16122  flags:0x00004002
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5408 [inline]
 __schedule+0xf15/0x5d00 kernel/sched/core.c:6745
 preempt_schedule_irq+0x51/0x90 kernel/sched/core.c:7067
 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:lock_release+0x3ba/0x6c0 kernel/locking/lockdep.c:5762
Code: 7e 83 f8 01 0f 85 f5 01 00 00 9c 58 f6 c4 02 0f 85 e0 01 00 00 48 f7 04 24 00 02 00 00 74 01 fb 48 b8 00 00 00 00 00 fc ff df <48> 01 c5 48 c7 45 00 00 00 00 00 c7 45 08 00 00 00 00 48 8b 84 24
RSP: 0000:ffffc9000331f4b8 EFLAGS: 00000206
RAX: dffffc0000000000 RBX: d5e9e978e57f2557 RCX: ffffc9000331f508
RDX: 1ffff110040708da RSI: ffffffff8b2cb0e0 RDI: ffffffff8b8fffc0
RBP: 1ffff92000663e99 R08: 0000000000000000 R09: fffffbfff1fc8bca
R10: ffffffff8fe45e57 R11: 0000000000000003 R12: 0000000000000001
R13: 0000000000000002 R14: ffff8880203846d8 R15: ffff888020383c00
 rcu_lock_release include/linux/rcupdate.h:339 [inline]
 rcu_read_unlock+0x32/0xb0 include/linux/rcupdate.h:812
 pte_unmap include/linux/pgtable.h:115 [inline]
 do_anonymous_page mm/memory.c:4521 [inline]
 do_pte_missing mm/memory.c:3901 [inline]
 handle_pte_fault mm/memory.c:5380 [inline]
 __handle_mm_fault+0x288c/0x53f0 mm/memory.c:5523
 handle_mm_fault+0x476/0xa00 mm/memory.c:5688
 faultin_page mm/gup.c:1290 [inline]
 __get_user_pages+0x473/0x1490 mm/gup.c:1589
 __get_user_pages_locked mm/gup.c:1857 [inline]
 __gup_longterm_locked+0x243/0x2790 mm/gup.c:2556
 pin_user_pages_remote+0xee/0x150 mm/gup.c:3616
 process_vm_rw_single_vec mm/process_vm_access.c:106 [inline]
 process_vm_rw_core.constprop.0+0x439/0xa10 mm/process_vm_access.c:216
 process_vm_rw+0x301/0x360 mm/process_vm_access.c:284
 __do_sys_process_vm_readv mm/process_vm_access.c:296 [inline]
 __se_sys_process_vm_readv mm/process_vm_access.c:292 [inline]
 __x64_sys_process_vm_readv+0xe2/0x1c0 mm/process_vm_access.c:292
 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: 0033:0x7fbd70e7cee9
RSP: 002b:00007fbd709ff0c8 EFLAGS: 00000246 ORIG_RAX: 0000000000000136
RAX: ffffffffffffffda RBX: 00007fbd70fb3fa0 RCX: 00007fbd70e7cee9
RDX: 0000000000000002 RSI: 0000000020008400 RDI: 00000000000002d5
RBP: 00007fbd70ec947f R08: 0000000000000286 R09: 0000000000000000
R10: 0000000020008640 R11: 0000000000000246 R12: 0000000000000000
R13: 000000000000000b R14: 00007fbd70fb3fa0 R15: 00007ffe0517e958
 </TASK>
rcu: rcu_preempt kthread starved for 10537 jiffies! g163401 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:27136 pid:17    tgid:17    ppid:2      flags:0x00004000
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5408 [inline]
 __schedule+0xf15/0x5d00 kernel/sched/core.c:6745
 __schedule_loop kernel/sched/core.c:6822 [inline]
 schedule+0xe7/0x350 kernel/sched/core.c:6837
 schedule_timeout+0x136/0x2a0 kernel/time/timer.c:2581
 rcu_gp_fqs_loop+0x1eb/0xb00 kernel/rcu/tree.c:2000
 rcu_gp_kthread+0x271/0x380 kernel/rcu/tree.c:2202
 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 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:86 [inline]
NMI backtrace for cpu 0 skipped: idling at acpi_safe_halt+0x1a/0x20 drivers/acpi/processor_idle.c:112