rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: 	Tasks blocked on level-0 rcu_node (CPUs 0-1): P9810/1:b..l
rcu: 	(detected by 0, t=10502 jiffies, g=64345, q=349 ncpus=2)
task:syz.2.602       state:R  running task     stack:25824 pid:9810  tgid:9809  ppid:8946   flags:0x00004002
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5188 [inline]
 __schedule+0xe37/0x5490 kernel/sched/core.c:6529
 preempt_schedule_irq+0x51/0x90 kernel/sched/core.c:6851
 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:trace_lock_acquire include/trace/events/lock.h:24 [inline]
RIP: 0010:lock_acquire+0xc3/0x560 kernel/locking/lockdep.c:5730
Code: 07 0f 87 0e 04 00 00 89 d5 be 08 00 00 00 48 89 e8 48 c1 e8 06 48 8d 3c c5 98 46 14 90 e8 25 c8 80 00 48 0f a3 2d 35 86 aa 0e <0f> 82 ad 03 00 00 48 c7 c0 98 79 14 90 48 ba 00 00 00 00 00 fc ff
RSP: 0018:ffffc90004037410 EFLAGS: 00000247
RAX: 0000000000000001 RBX: 1ffff92000806e84 RCX: ffffffff8169c05b
RDX: fffffbfff20288d4 RSI: 0000000000000008 RDI: ffffffff90144698
RBP: 0000000000000001 R08: 0000000000000000 R09: fffffbfff20288d3
R10: ffffffff9014469f R11: 0000000000000000 R12: 0000000000000000
R13: 0000000000000000 R14: ffffffff8ddb9fe0 R15: 0000000000000000
 rcu_lock_acquire include/linux/rcupdate.h:326 [inline]
 rcu_read_lock include/linux/rcupdate.h:838 [inline]
 __pte_offset_map+0x48/0x540 mm/pgtable-generic.c:287
 __pte_offset_map_lock+0x8e/0x300 mm/pgtable-generic.c:371
 pte_offset_map_lock include/linux/mm.h:3000 [inline]
 do_anonymous_page mm/memory.c:4531 [inline]
 do_pte_missing mm/memory.c:3945 [inline]
 handle_pte_fault mm/memory.c:5521 [inline]
 __handle_mm_fault+0x27bd/0x5660 mm/memory.c:5664
 handle_mm_fault+0x498/0xa60 mm/memory.c:5832
 faultin_page mm/gup.c:1194 [inline]
 __get_user_pages+0x475/0x15c0 mm/gup.c:1493
 __get_user_pages_locked mm/gup.c:1760 [inline]
 __gup_longterm_locked+0x22e/0x1b30 mm/gup.c:2489
 pin_user_pages_remote+0xee/0x150 mm/gup.c:3528
 process_vm_rw_single_vec mm/process_vm_access.c:106 [inline]
 process_vm_rw_core.constprop.0+0x439/0x9f0 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: 0033:0x7fe650b7cef9
RSP: 002b:00007fe6519fd038 EFLAGS: 00000246 ORIG_RAX: 0000000000000136
RAX: ffffffffffffffda RBX: 00007fe650d35f80 RCX: 00007fe650b7cef9
RDX: 0000000000000002 RSI: 0000000020008400 RDI: 0000000000000072
RBP: 00007fe650bef01e R08: 0000000000000286 R09: 0000000000000000
R10: 0000000020008640 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007fe650d35f80 R15: 00007fff9d12d458
 </TASK>
rcu: rcu_preempt kthread starved for 10100 jiffies! g64345 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:26640 pid:17    tgid:17    ppid:2      flags:0x00004000
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5188 [inline]
 __schedule+0xe37/0x5490 kernel/sched/core.c:6529
 __schedule_loop kernel/sched/core.c:6606 [inline]
 schedule+0xe7/0x350 kernel/sched/core.c:6621
 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