rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
	(detected by 0, t=10502 jiffies, g=64493, q=18)
rcu: All QSes seen, last rcu_preempt kthread activity 10501 (4295001576-4294991075), jiffies_till_next_fqs=1, root ->qsmask 0x0
syz-executor.4  R  running task    27448 21181   9589 0x80004002
Call Trace:
 <IRQ>
 sched_show_task kernel/sched/core.c:5954 [inline]
 sched_show_task.cold+0x2ee/0x35d kernel/sched/core.c:5929
 print_other_cpu_stall kernel/rcu/tree_stall.h:410 [inline]
 check_cpu_stall kernel/rcu/tree_stall.h:538 [inline]
 rcu_pending kernel/rcu/tree.c:2827 [inline]
 rcu_sched_clock_irq.cold+0xaf4/0xc0d kernel/rcu/tree.c:2271
 update_process_times+0x2d/0x70 kernel/time/timer.c:1726
 tick_sched_handle+0xa2/0x190 kernel/time/tick-sched.c:167
 tick_sched_timer+0x53/0x140 kernel/time/tick-sched.c:1310
 __run_hrtimer kernel/time/hrtimer.c:1517 [inline]
 __hrtimer_run_queues+0x364/0xe40 kernel/time/hrtimer.c:1579
 hrtimer_interrupt+0x314/0x770 kernel/time/hrtimer.c:1641
 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1110 [inline]
 smp_apic_timer_interrupt+0x160/0x610 arch/x86/kernel/apic/apic.c:1135
 apic_timer_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:829
 </IRQ>
RIP: 0010:__sanitizer_cov_trace_pc+0x3b/0x50 kernel/kcov.c:192
Code: 28 8d 7e 81 e2 00 01 1f 00 48 8b 75 08 75 2b 8b 90 80 13 00 00 83 fa 02 75 20 48 8b 88 88 13 00 00 8b 80 84 13 00 00 48 8b 11 <48> 83 c2 01 48 39 d0 76 07 48 89 34 d1 48 89 11 5d c3 0f 1f 00 65
RSP: 0018:ffffc9000647f3c8 EFLAGS: 00000246 ORIG_RAX: ffffffffffffff13
RAX: 0000000000040000 RBX: 0000000000000000 RCX: ffffc90012b39000
RDX: 000000000003ffff RSI: ffffffff8198d74d RDI: 0000000000000006
RBP: ffffc9000647f3c8 R08: ffff8880949e6100 R09: ffffed10146402b1
R10: ffffed10146402b0 R11: ffff8880a3201587 R12: ffffc9000647f4c0
R13: 0000000000000000 R14: ffff8880a5030758 R15: 0000000000000400
 trace_mm_shrink_slab_start include/trace/events/vmscan.h:185 [inline]
 do_shrink_slab+0x28d/0xad0 mm/vmscan.c:501
 shrink_slab_memcg mm/vmscan.c:596 [inline]
 shrink_slab+0x4fc/0x680 mm/vmscan.c:675
 shrink_node_memcgs mm/vmscan.c:2687 [inline]
 shrink_node+0x46a/0x1ad0 mm/vmscan.c:2791
 shrink_zones mm/vmscan.c:2996 [inline]
 do_try_to_free_pages+0x3ba/0x14f0 mm/vmscan.c:3049
 try_to_free_mem_cgroup_pages+0x30c/0xa70 mm/vmscan.c:3371
 try_charge+0x628/0x14d0 mm/memcontrol.c:2455
 mem_cgroup_try_charge+0x136/0x590 mm/memcontrol.c:6404
 mem_cgroup_try_charge_delay+0x1f/0xa0 mm/memcontrol.c:6419
 do_anonymous_page mm/memory.c:3154 [inline]
 handle_pte_fault mm/memory.c:3995 [inline]
 __handle_mm_fault+0x1f61/0x3cc0 mm/memory.c:4127
 handle_mm_fault+0x3b2/0xa50 mm/memory.c:4164
 faultin_page mm/gup.c:640 [inline]
 __get_user_pages+0x7b2/0x1ac0 mm/gup.c:851
 populate_vma_page_range+0x20d/0x2a0 mm/gup.c:1235
 __mm_populate+0x204/0x380 mm/gup.c:1283
 mm_populate include/linux/mm.h:2347 [inline]
 __do_sys_mlockall mm/mlock.c:823 [inline]
 __se_sys_mlockall mm/mlock.c:799 [inline]
 __x64_sys_mlockall+0x473/0x520 mm/mlock.c:799
 do_syscall_64+0xfa/0x790 arch/x86/entry/common.c:294
 entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x45af49
Code: ad b6 fb ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 90 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 0f 83 7b b6 fb ff c3 66 2e 0f 1f 84 00 00 00 00
RSP: 002b:00007faa2f36ec78 EFLAGS: 00000246 ORIG_RAX: 0000000000000097
RAX: ffffffffffffffda RBX: 0000000000000001 RCX: 000000000045af49
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000003
RBP: 000000000075bf20 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00007faa2f36f6d4
R13: 00000000004c83c5 R14: 00000000004e06a8 R15: 00000000ffffffff
rcu: rcu_preempt kthread starved for 10552 jiffies! g64493 f0x2 RCU_GP_WAIT_FQS(5) ->state=0x0 ->cpu=1
rcu: RCU grace-period kthread stack dump:
rcu_preempt     R  running task    29264    10      2 0x80004000
Call Trace:
 context_switch kernel/sched/core.c:3385 [inline]
 __schedule+0x934/0x1f90 kernel/sched/core.c:4081
 schedule+0xdc/0x2b0 kernel/sched/core.c:4155
 schedule_timeout+0x486/0xc50 kernel/time/timer.c:1895
 rcu_gp_fqs_loop kernel/rcu/tree.c:1661 [inline]
 rcu_gp_kthread+0x9b2/0x18d0 kernel/rcu/tree.c:1821
 kthread+0x361/0x430 kernel/kthread.c:255
 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:352