rcu: INFO: rcu_preempt self-detected stall on CPU
rcu: 	1-...!: (10499 ticks this GP) idle=7de/1/0x4000000000000002 softirq=356597/356597 fqs=0 
	(t=10501 jiffies g=578197 q=87)
rcu: rcu_preempt kthread starved for 10502 jiffies! g578197 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x0 ->cpu=0
rcu: RCU grace-period kthread stack dump:
rcu_preempt     R  running task    29112    10      2 0x80004000
Call Trace:
 context_switch kernel/sched/core.c:3254 [inline]
 __schedule+0x755/0x1580 kernel/sched/core.c:3880
 schedule+0xa8/0x270 kernel/sched/core.c:3944
 schedule_timeout+0x486/0xc50 kernel/time/timer.c:1807
 rcu_gp_fqs_loop kernel/rcu/tree.c:1611 [inline]
 rcu_gp_kthread+0x9b2/0x18c0 kernel/rcu/tree.c:1768
 kthread+0x361/0x430 kernel/kthread.c:255
 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:352
NMI backtrace for cpu 1
CPU: 1 PID: 17937 Comm: syz-executor.0 Not tainted 5.3.0-rc5+ #115
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
 <IRQ>
 __dump_stack lib/dump_stack.c:77 [inline]
 dump_stack+0x172/0x1f0 lib/dump_stack.c:113
 nmi_cpu_backtrace.cold+0x70/0xb2 lib/nmi_backtrace.c:101
 nmi_trigger_cpumask_backtrace+0x23b/0x28b lib/nmi_backtrace.c:62
 arch_trigger_cpumask_backtrace+0x14/0x20 arch/x86/kernel/apic/hw_nmi.c:38
 trigger_single_cpu_backtrace include/linux/nmi.h:164 [inline]
 rcu_dump_cpu_stacks+0x183/0x1cf kernel/rcu/tree_stall.h:254
 print_cpu_stall kernel/rcu/tree_stall.h:455 [inline]
 check_cpu_stall kernel/rcu/tree_stall.h:529 [inline]
 rcu_pending kernel/rcu/tree.c:2736 [inline]
 rcu_sched_clock_irq.cold+0x4dd/0xc13 kernel/rcu/tree.c:2183
 update_process_times+0x32/0x80 kernel/time/timer.c:1639
 tick_sched_handle+0xa2/0x190 kernel/time/tick-sched.c:167
 tick_sched_timer+0x53/0x140 kernel/time/tick-sched.c:1296
 __run_hrtimer kernel/time/hrtimer.c:1389 [inline]
 __hrtimer_run_queues+0x364/0xe40 kernel/time/hrtimer.c:1451
 hrtimer_interrupt+0x314/0x770 kernel/time/hrtimer.c:1509
 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1068 [inline]
 smp_apic_timer_interrupt+0x160/0x610 arch/x86/kernel/apic/apic.c:1093
 apic_timer_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:830
 </IRQ>
RIP: 0010:arch_local_irq_restore arch/x86/include/asm/paravirt.h:768 [inline]
RIP: 0010:lock_release+0x4c0/0x960 kernel/locking/lockdep.c:4434
Code: 00 00 00 00 00 48 c1 e8 03 80 3c 10 00 0f 85 8c 03 00 00 48 83 3d bf 37 7a 07 00 0f 84 7f 01 00 00 48 8b bd 48 ff ff ff 57 9d <0f> 1f 44 00 00 48 b8 00 00 00 00 00 fc ff df 48 01 c3 48 c7 03 00
RSP: 0000:ffff888208e26cd0 EFLAGS: 00000282 ORIG_RAX: ffffffffffffff13
RAX: 1ffffffff11a5e62 RBX: 1ffff110411c4d9f RCX: 1ffffffff134b55e
RDX: dffffc0000000000 RSI: 0000000000000000 RDI: 0000000000000282
RBP: ffff888208e26da0 R08: 1ffffffff134af1f R09: fffffbfff134af20
R10: fffffbfff134af1f R11: ffffffff89a578ff R12: ffff88801d9a0480
R13: ffffffff8194bf50 R14: ffff888208e26d78 R15: ffff88801d9a0480
 rcu_lock_release include/linux/rcupdate.h:213 [inline]
 rcu_read_unlock include/linux/rcupdate.h:646 [inline]
 page_evictable+0x1e7/0x3b0 mm/vmscan.c:4238
 shrink_active_list+0x3a7/0x13a0 mm/vmscan.c:2083
 shrink_list mm/vmscan.c:2227 [inline]
 shrink_node_memcg+0x68d/0x1430 mm/vmscan.c:2496
 shrink_node+0x294/0x16b0 mm/vmscan.c:2711
 shrink_zones mm/vmscan.c:2942 [inline]
 do_try_to_free_pages+0x3cb/0x11f0 mm/vmscan.c:3000
 try_to_free_mem_cgroup_pages+0x314/0xa80 mm/vmscan.c:3299
 try_charge+0x602/0x1440 mm/memcontrol.c:2438
 mem_cgroup_try_charge+0x136/0x590 mm/memcontrol.c:6128
 mem_cgroup_try_charge_delay+0x1f/0xa0 mm/memcontrol.c:6143
 shmem_getpage_gfp+0x88e/0x2680 mm/shmem.c:1856
 shmem_getpage mm/shmem.c:139 [inline]
 shmem_file_read_iter+0x30e/0xbd0 mm/shmem.c:2544
 call_read_iter include/linux/fs.h:1864 [inline]
 generic_file_splice_read+0x4af/0x800 fs/splice.c:307
 do_splice_to+0x127/0x180 fs/splice.c:877
 splice_direct_to_actor+0x2d2/0x970 fs/splice.c:954
 do_splice_direct+0x1da/0x2a0 fs/splice.c:1063
 do_sendfile+0x597/0xd00 fs/read_write.c:1464
 __do_sys_sendfile64 fs/read_write.c:1519 [inline]
 __se_sys_sendfile64 fs/read_write.c:1511 [inline]
 __x64_sys_sendfile64+0x15a/0x220 fs/read_write.c:1511
 do_syscall_64+0xfd/0x6a0 arch/x86/entry/common.c:296
 entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x459829
Code: fd b7 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 cb b7 fb ff c3 66 2e 0f 1f 84 00 00 00 00
RSP: 002b:00007ff0e89bac78 EFLAGS: 00000246 ORIG_RAX: 0000000000000028
RAX: ffffffffffffffda RBX: 0000000000000004 RCX: 0000000000459829
RDX: 0000000020000040 RSI: 0000000000000008 RDI: 0000000000000007
RBP: 000000000075c310 R08: 0000000000000000 R09: 0000000000000000
R10: 00000000fffffdef R11: 0000000000000246 R12: 00007ff0e89bb6d4
R13: 00000000004c7005 R14: 00000000004dc630 R15: 00000000ffffffff