rcu: INFO: rcu_sched self-detected stall on CPU
rcu: 	1-....: (10499 ticks this GP) idle=262/1/0x4000000000000002 softirq=83189/83189 fqs=5245 
	(t=10500 jiffies g=123273 q=379)
NMI backtrace for cpu 1
CPU: 1 PID: 3679 Comm: syz-executor.3 Not tainted 5.2.0+ #37
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+0x1d8/0x2f8 /lib/dump_stack.c:113
 nmi_cpu_backtrace+0xb0/0x1a0 /lib/nmi_backtrace.c:101
 nmi_trigger_cpumask_backtrace+0x14c/0x240 /lib/nmi_backtrace.c:62
 arch_trigger_cpumask_backtrace+0x10/0x20 /arch/x86/kernel/apic/hw_nmi.c:38
 trigger_single_cpu_backtrace /./include/linux/nmi.h:164 [inline]
 rcu_dump_cpu_stacks+0x15a/0x220 /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+0x7e3/0xfb0 /kernel/rcu/tree.c:2183
 update_process_times+0x114/0x170 /kernel/time/timer.c:1639
 tick_sched_handle /kernel/time/tick-sched.c:167 [inline]
 tick_sched_timer+0x257/0x410 /kernel/time/tick-sched.c:1296
 __run_hrtimer /kernel/time/hrtimer.c:1389 [inline]
 __hrtimer_run_queues+0x471/0x8c0 /kernel/time/hrtimer.c:1451
 hrtimer_interrupt+0x36c/0xd80 /kernel/time/hrtimer.c:1509
 local_apic_timer_interrupt /arch/x86/kernel/apic/apic.c:1068 [inline]
 smp_apic_timer_interrupt+0xc2/0x220 /arch/x86/kernel/apic/apic.c:1093
 apic_timer_interrupt+0xf/0x20 /arch/x86/entry/entry_64.S:828
 </IRQ>
RIP: 0010:blk_start_plug+0x115/0x140 /block/blk-core.c:1678
Code: e8 03 42 8a 04 20 84 c0 75 34 41 c6 07 00 43 80 7c 25 00 00 74 08 48 89 df e8 d7 0c 60 fe 4c 89 33 5b 41 5c 41 5d 41 5e 41 5f <5d> c3 89 f9 80 e1 07 fe c1 38 c1 7c b9 e8 79 0c 60 fe eb b2 44 89
RSP: 0018:ffff8880970cec10 EFLAGS: 00000246 ORIG_RAX: ffffffffffffff13
RAX: 1ffff11012e19d00 RBX: 0000000000000000 RCX: ffff88808667e0c0
RDX: 0000000000000000 RSI: ffff8880970ced48 RDI: ffff8880970cede0
RBP: ffff8880970cec10 R08: dffffc0000000000 R09: ffffed1012e19db3
R10: ffffed1012e19db3 R11: 0000000000000000 R12: ffff8880970cf320
R13: ffff88809b43ed80 R14: ffff8880970ced20 R15: ffff88809b43ed80
 shrink_node_memcg+0x28e/0x1120 /mm/vmscan.c:2481
 shrink_node+0x468/0x17a0 /mm/vmscan.c:2707
 shrink_zones+0x2d8/0x940 /mm/vmscan.c:2940
 do_try_to_free_pages+0x21e/0x930 /mm/vmscan.c:2998
 try_to_free_mem_cgroup_pages+0x3d1/0x6c0 /mm/vmscan.c:3300
 try_charge+0x6aa/0x17b0 /mm/memcontrol.c:2399
 __memcg_kmem_charge_memcg+0x78/0x180 /mm/memcontrol.c:2781
 memcg_kmem_charge_memcg /./include/linux/memcontrol.h:1314 [inline]
 memcg_charge_slab /mm/slab.h:304 [inline]
 charge_slab_page /mm/slab.h:425 [inline]
 kmem_getpages+0x411/0x970 /mm/slab.c:1372
 cache_grow_begin+0x7e/0x2c0 /mm/slab.c:2599
 fallback_alloc+0x134/0x1c0 /mm/slab.c:3146
 ____cache_alloc_node+0x22a/0x250 /mm/slab.c:3214
 __do_cache_alloc /mm/slab.c:3283 [inline]
 slab_alloc /mm/slab.c:3311 [inline]
 kmem_cache_alloc+0x157/0x2e0 /mm/slab.c:3483
 ext4_alloc_inode+0x1f/0x560 /fs/ext4/super.c:1073
 alloc_inode /fs/inode.c:227 [inline]
 new_inode_pseudo+0x68/0x240 /fs/inode.c:916
 new_inode+0x28/0x1c0 /fs/inode.c:945
 __ext4_new_inode+0x60a/0x5d00 /fs/ext4/ialloc.c:829
 ext4_mkdir+0x423/0x14c0 /fs/ext4/namei.c:2763
 vfs_mkdir+0x43f/0x610 /fs/namei.c:3815
 do_mkdirat+0x22a/0x390 /fs/namei.c:3838
 __do_sys_mkdir /fs/namei.c:3854 [inline]
 __se_sys_mkdir /fs/namei.c:3852 [inline]
 __x64_sys_mkdir+0x60/0x70 /fs/namei.c:3852
 do_syscall_64+0xfe/0x140 /arch/x86/entry/common.c:296
 entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x458c37
Code: 1f 40 00 b8 5a 00 00 00 0f 05 48 3d 01 f0 ff ff 0f 83 cd c3 fb ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 90 b8 53 00 00 00 0f 05 <48> 3d 01 f0 ff ff 0f 83 ad c3 fb ff c3 66 2e 0f 1f 84 00 00 00 00
RSP: 002b:00007ffd8be2f018 EFLAGS: 00000206 ORIG_RAX: 0000000000000053
RAX: ffffffffffffffda RBX: 00000000000c90ac RCX: 0000000000458c37
RDX: 00007ffd8be2f063 RSI: 00000000000001ff RDI: 00007ffd8be2f060
RBP: 0000000000000006 R08: 0000000000000080 R09: 0000000000000003
R10: 0000000000000064 R11: 0000000000000206 R12: 0000000000000012
R13: 00007ffd8be2f050 R14: 00000000000c901b R15: 00007ffd8be2f060