sched: DL replenish lagged too much
rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: 	Tasks blocked on level-0 rcu_node (CPUs 0-1): P7180/2:b..l
rcu: 	(detected by 1, t=10502 jiffies, g=19841, q=1040649 ncpus=2)
task:syz.5.599       state:R  running task     stack:23984 pid:7180  tgid:7177  ppid:5226   flags:0x00004002
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5264 [inline]
 __schedule+0x1893/0x4b50 kernel/sched/core.c:6607
 preempt_schedule_irq+0xfb/0x1c0 kernel/sched/core.c:6929
 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:bytes_is_nonzero mm/kasan/generic.c:87 [inline]
RIP: 0010:memory_is_nonzero mm/kasan/generic.c:104 [inline]
RIP: 0010:memory_is_poisoned_n mm/kasan/generic.c:129 [inline]
RIP: 0010:memory_is_poisoned mm/kasan/generic.c:161 [inline]
RIP: 0010:check_region_inline mm/kasan/generic.c:180 [inline]
RIP: 0010:kasan_check_range+0x86/0x290 mm/kasan/generic.c:189
Code: 00 fc ff df 4f 8d 3c 31 4c 89 fd 4c 29 dd 48 83 fd 10 7f 29 48 85 ed 0f 84 3e 01 00 00 4c 89 cd 48 f7 d5 48 01 dd 41 80 3b 00 <0f> 85 c9 01 00 00 49 ff c3 48 ff c5 75 ee e9 1e 01 00 00 45 89 dc
RSP: 0018:ffffc90004787248 EFLAGS: 00000246
RAX: ffffffff81ccc101 RBX: 1ffffd40002e9ae0 RCX: ffffffff81ccc112
RDX: 0000000000000000 RSI: 0000000000000008 RDI: ffffea000174d700
RBP: ffffffffffffffff R08: ffffea000174d707 R09: 1ffffd40002e9ae0
R10: dffffc0000000000 R11: fffff940002e9ae0 R12: ffffc90004787440
R13: ffffea000174d708 R14: dffffc0000000001 R15: fffff940002e9ae1
 instrument_atomic_read include/linux/instrumented.h:68 [inline]
 _test_bit include/asm-generic/bitops/instrumented-non-atomic.h:141 [inline]
 folio_test_locked include/linux/page-flags.h:507 [inline]
 next_uptodate_folio+0x122/0xa40 mm/filemap.c:3481
 filemap_map_pages+0x2ff/0x1e70 mm/filemap.c:3623
 do_fault_around mm/memory.c:5034 [inline]
 do_read_fault mm/memory.c:5067 [inline]
 do_fault mm/memory.c:5206 [inline]
 do_pte_missing mm/memory.c:3962 [inline]
 handle_pte_fault+0x30a6/0x7010 mm/memory.c:5536
 __handle_mm_fault mm/memory.c:5679 [inline]
 handle_mm_fault+0x1106/0x1bb0 mm/memory.c:5847
 faultin_page mm/gup.c:1207 [inline]
 __get_user_pages+0x6ec/0x16a0 mm/gup.c:1506
 populate_vma_page_range+0x264/0x330 mm/gup.c:1945
 __mm_populate+0x27a/0x460 mm/gup.c:2048
 mm_populate include/linux/mm.h:3437 [inline]
 vm_mmap_pgoff+0x2c3/0x3d0 mm/util.c:593
 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: 0033:0x7faeca37def9
RSP: 002b:00007faecb1a7038 EFLAGS: 00000246 ORIG_RAX: 0000000000000009
RAX: ffffffffffffffda RBX: 00007faeca535f80 RCX: 00007faeca37def9
RDX: b635773f06ebbeee RSI: 0000000000b36000 RDI: 0000000020000000
RBP: 00007faeca3f0b76 R08: ffffffffffffffff R09: 0000000000000000
R10: 0000000000008031 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007faeca535f80 R15: 00007ffc6fd7be58
 </TASK>
rcu: rcu_preempt kthread starved for 10290 jiffies! g19841 f0x2 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:25832 pid:17    tgid:17    ppid:2      flags:0x00004000
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5264 [inline]
 __schedule+0x1893/0x4b50 kernel/sched/core.c:6607
 __schedule_loop kernel/sched/core.c:6684 [inline]
 schedule+0x14b/0x320 kernel/sched/core.c:6699
 schedule_timeout+0x1be/0x310 kernel/time/timer.c:2615
 rcu_gp_fqs_loop+0x2df/0x1330 kernel/rcu/tree.c:2045
 rcu_gp_kthread+0xa7/0x3b0 kernel/rcu/tree.c:2247
 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:106 [inline]
NMI backtrace for cpu 0 skipped: idling at acpi_safe_halt+0x21/0x30 drivers/acpi/processor_idle.c:111