rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: 	Tasks blocked on level-0 rcu_node (CPUs 0-1): P15645/1:b..l
rcu: 	(detected by 1, t=10502 jiffies, g=136713, q=543 ncpus=2)
task:syz.3.1789      state:R  running task     stack:23640 pid:15645 tgid:15643 ppid:15009  flags:0x00004004
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5408 [inline]
 __schedule+0x17e8/0x4a20 kernel/sched/core.c:6745
 preempt_schedule_irq+0xfb/0x1c0 kernel/sched/core.c:7067
 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:rcu_read_unlock include/linux/rcupdate.h:810 [inline]
RIP: 0010:count_memcg_event_mm+0x334/0x420 include/linux/memcontrol.h:1078
Code: 62 1f b3 ff 4c 8b 6c 24 18 eb 1f e8 56 1f b3 ff e8 51 de a2 09 4d 85 f6 74 84 e8 47 1f b3 ff fb 49 be 00 00 00 00 00 fc ff df <e8> d7 e4 a2 09 89 c3 31 ff 89 c6 e8 6c 23 b3 ff 85 db 74 10 e8 d3
RSP: 0018:ffffc90004467740 EFLAGS: 00000283
RAX: ffffffff81e30869 RBX: 0000000000000000 RCX: 0000000000040000
RDX: ffffc9000c101000 RSI: 0000000000022d88 RDI: 0000000000022d89
RBP: ffffc90004467810 R08: ffffffff81e307d9 R09: 1ffffffff25f4eb6
R10: dffffc0000000000 R11: fffffbfff25f4eb7 R12: 0000000000000046
R13: ffffffff81e305d4 R14: dffffc0000000000 R15: 1ffff9200088ceec
 mm_account_fault mm/memory.c:5558 [inline]
 handle_mm_fault+0x16c4/0x1ba0 mm/memory.c:5705
 faultin_page mm/gup.c:1290 [inline]
 __get_user_pages+0x6ef/0x1590 mm/gup.c:1589
 populate_vma_page_range+0x264/0x330 mm/gup.c:2029
 __mm_populate+0x27a/0x460 mm/gup.c:2132
 mm_populate include/linux/mm.h:3469 [inline]
 vm_mmap_pgoff+0x2c3/0x3d0 mm/util.c:578
 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: 0033:0x7f0252975bd9
RSP: 002b:00007f0253735048 EFLAGS: 00000246 ORIG_RAX: 0000000000000009
RAX: ffffffffffffffda RBX: 00007f0252b03f60 RCX: 00007f0252975bd9
RDX: b635773f06ebbeee RSI: 0000000000b36000 RDI: 0000000020000000
RBP: 00007f02529e4aa1 R08: ffffffffffffffff R09: 0000000000000000
R10: 0000000000008031 R11: 0000000000000246 R12: 0000000000000000
R13: 000000000000000b R14: 00007f0252b03f60 R15: 00007ffd54207cf8
 </TASK>
rcu: rcu_preempt kthread starved for 10449 jiffies! g136713 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:25560 pid:17    tgid:17    ppid:2      flags:0x00004000
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5408 [inline]
 __schedule+0x17e8/0x4a20 kernel/sched/core.c:6745
 __schedule_loop kernel/sched/core.c:6822 [inline]
 schedule+0x14b/0x320 kernel/sched/core.c:6837
 schedule_timeout+0x1be/0x310 kernel/time/timer.c:2581
 rcu_gp_fqs_loop+0x2df/0x1330 kernel/rcu/tree.c:2000
 rcu_gp_kthread+0xa7/0x3b0 kernel/rcu/tree.c:2202
 kthread+0x2f2/0x390 kernel/kthread.c:389
 ret_from_fork+0x4d/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+0x21/0x30 drivers/acpi/processor_idle.c:112