rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: 	Tasks blocked on level-0 rcu_node (CPUs 0-1): P6954/1:b..l
rcu: 	(detected by 1, t=10502 jiffies, g=30329, q=302 ncpus=2)
task:syz-executor.0  state:R  running task     stack:26112 pid:6954  tgid:6953  ppid:5099   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+0x54/0x6c0 kernel/locking/lockdep.c:5762
Code: 24 08 48 c7 44 24 10 b3 8a b5 41 48 c1 ed 03 48 c7 44 24 18 18 e9 24 8d 48 01 e8 48 c7 44 24 20 00 c3 6b 81 c7 00 f1 f1 f1 f1 <c7> 40 04 f1 f1 04 f2 c7 40 08 04 f3 f3 f3 65 48 8b 04 25 28 00 00
RSP: 0018:ffffc9000332f620 EFLAGS: 00000286
RAX: fffff52000665ec6 RBX: 0000000000000001 RCX: ffffc90003499000
RDX: 0000000000040000 RSI: ffffffff81d20dcc RDI: ffffffff8dbb1760
RBP: 1ffff92000665ec6 R08: 0000000000000001 R09: 0000000000000000
R10: 0000000000000001 R11: 0000000000000001 R12: ffffffff8dbb1760
R13: 0000000000000000 R14: ffff88807c1e6810 R15: 0000000000000000
 rcu_lock_release include/linux/rcupdate.h:339 [inline]
 rcu_read_unlock include/linux/rcupdate.h:812 [inline]
 count_memcg_event_mm.part.0+0x131/0x340 include/linux/memcontrol.h:1121
 count_memcg_event_mm include/linux/memcontrol.h:580 [inline]
 mm_account_fault mm/memory.c:5470 [inline]
 handle_mm_fault+0x1b8/0xa00 mm/memory.c:5617
 faultin_page mm/gup.c:958 [inline]
 __get_user_pages+0x4cc/0x1510 mm/gup.c:1257
 __get_user_pages_locked mm/gup.c:1525 [inline]
 __gup_longterm_locked+0x27d/0x28f0 mm/gup.c:2223
 pin_user_pages_remote+0xee/0x150 mm/gup.c:3370
 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+0xcf/0x260 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7ff9a327cee9
RSP: 002b:00007ff9a3f500c8 EFLAGS: 00000246 ORIG_RAX: 0000000000000136
RAX: ffffffffffffffda RBX: 00007ff9a33abf80 RCX: 00007ff9a327cee9
RDX: 0000000000000002 RSI: 0000000020008400 RDI: 0000000000000145
RBP: 00007ff9a32c949e R08: 0000000000000286 R09: 0000000000000000
R10: 0000000020008640 R11: 0000000000000246 R12: 0000000000000000
R13: 000000000000000b R14: 00007ff9a33abf80 R15: 00007fff3c415c78
 </TASK>
rcu: rcu_preempt kthread starved for 10384 jiffies! g30329 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:28544 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