rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: 	Tasks blocked on level-0 rcu_node (CPUs 0-1): P8597/1:b..l
rcu: 	(detected by 1, t=10502 jiffies, g=35517, q=312 ncpus=2)
task:syz.1.1076      state:R  running task     stack:24504 pid:8597  tgid:8595  ppid:5226   flags:0x00004002
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5188 [inline]
 __schedule+0x17ae/0x4a10 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:lock_acquire+0x264/0x550 kernel/locking/lockdep.c:5763
Code: 2b 00 74 08 4c 89 f7 e8 7a e0 87 00 f6 44 24 61 02 0f 85 85 01 00 00 41 f7 c7 00 02 00 00 74 01 fb 48 c7 44 24 40 0e 36 e0 45 <4b> c7 44 25 00 00 00 00 00 43 c7 44 25 09 00 00 00 00 43 c7 44 25
RSP: 0018:ffffc90003edf2e0 EFLAGS: 00000206
RAX: 0000000000000001 RBX: 1ffff920007dbe68 RCX: 7a9ef0d9891efd00
RDX: dffffc0000000000 RSI: ffffffff8beae6c0 RDI: ffffffff8c3fb900
RBP: ffffc90003edf428 R08: ffffffff93fa6847 R09: 1ffffffff27f4d08
R10: dffffc0000000000 R11: fffffbfff27f4d09 R12: 1ffff920007dbe64
R13: dffffc0000000000 R14: ffffc90003edf340 R15: 0000000000000246
 rcu_lock_acquire include/linux/rcupdate.h:326 [inline]
 rcu_read_lock include/linux/rcupdate.h:838 [inline]
 count_memcg_event_mm+0xb1/0x420 include/linux/memcontrol.h:1017
 mm_account_fault mm/memory.c:5698 [inline]
 handle_mm_fault+0x1627/0x1ad0 mm/memory.c:5858
 faultin_page mm/gup.c:1194 [inline]
 __get_user_pages+0x6ec/0x16a0 mm/gup.c:1493
 __get_user_pages_locked mm/gup.c:1760 [inline]
 __gup_longterm_locked+0xed7/0x17d0 mm/gup.c:2489
 pin_user_pages_remote+0x132/0x1f0 mm/gup.c:3528
 process_vm_rw_single_vec mm/process_vm_access.c:106 [inline]
 process_vm_rw_core mm/process_vm_access.c:216 [inline]
 process_vm_rw+0x716/0xcf0 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+0xe0/0x100 mm/process_vm_access.c:292
 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: 0033:0x7f7f03579eb9
RSP: 002b:00007f7f04333038 EFLAGS: 00000246 ORIG_RAX: 0000000000000136
RAX: ffffffffffffffda RBX: 00007f7f03715f80 RCX: 00007f7f03579eb9
RDX: 0000000000000002 RSI: 0000000020008400 RDI: 00000000000002d6
RBP: 00007f7f035e793e R08: 0000000000000286 R09: 0000000000000000
R10: 0000000020008640 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007f7f03715f80 R15: 00007ffe2d1faf88
 </TASK>
rcu: rcu_preempt kthread starved for 10405 jiffies! g35517 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:26576 pid:17    tgid:17    ppid:2      flags:0x00004000
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5188 [inline]
 __schedule+0x17ae/0x4a10 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+0x2f0/0x390 kernel/kthread.c:389
 ret_from_fork+0x4b/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