INFO: rcu detected stall in memcg_kmem_cache_create

Kernel	Title	Repro	Cause bisect	Fix bisect	Count	Last	Reported	Patched	Status
upstream	INFO: rcu detected stall in memcg_kmem_cache_create_func kernel				1	1616d	1616d	0/26	closed as invalid on 2019/12/04 14:04

rcu: INFO: rcu_preempt self-detected stall on CPU rcu: 0-...!: (10499 ticks this GP) idle=036/1/0x4000000000000002 softirq=11989/11990 fqs=46 (t=10500 jiffies g=7493 q=490) rcu: rcu_preempt kthread starved for 10403 jiffies! g7493 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x0 ->cpu=1 rcu: RCU grace-period kthread stack dump: rcu_preempt R running task 28984 10 2 0x80004000 Call Trace: context_switch kernel/sched/core.c:3385 [inline] __schedule+0x9a0/0xcc0 kernel/sched/core.c:4081 schedule+0x181/0x210 kernel/sched/core.c:4155 schedule_timeout+0x14f/0x240 kernel/time/timer.c:1895 rcu_gp_fqs_loop kernel/rcu/tree.c:1661 [inline] rcu_gp_kthread+0xed8/0x1770 kernel/rcu/tree.c:1821 kthread+0x332/0x350 kernel/kthread.c:255 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:352 NMI backtrace for cpu 0 CPU: 0 PID: 2823 Comm: kworker/0:34 Not tainted 5.5.0-rc5-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Workqueue: memcg_kmem_cache memcg_kmem_cache_create_func Call Trace: <IRQ> __dump_stack lib/dump_stack.c:77 [inline] dump_stack+0x1fb/0x318 lib/dump_stack.c:118 nmi_cpu_backtrace+0xaf/0x1a0 lib/nmi_backtrace.c:101 nmi_trigger_cpumask_backtrace+0x174/0x290 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:2827 [inline] rcu_sched_clock_irq+0xe25/0x1ad0 kernel/rcu/tree.c:2271 update_process_times+0x12d/0x180 kernel/time/timer.c:1726 tick_sched_handle kernel/time/tick-sched.c:167 [inline] tick_sched_timer+0x263/0x420 kernel/time/tick-sched.c:1310 __run_hrtimer kernel/time/hrtimer.c:1517 [inline] __hrtimer_run_queues+0x403/0x840 kernel/time/hrtimer.c:1579 hrtimer_interrupt+0x38c/0xda0 kernel/time/hrtimer.c:1641 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1110 [inline] smp_apic_timer_interrupt+0x109/0x280 arch/x86/kernel/apic/apic.c:1135 apic_timer_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:829 </IRQ> RIP: 0010:free_thread_stack+0x151/0x590 kernel/fork.c:280 Code: 31 f6 e8 02 8d 6f 00 43 80 3c 2e 00 74 08 4c 89 e7 e8 73 94 6a 00 49 8b 1c 24 48 83 c3 08 48 89 d8 48 c1 e8 03 42 80 3c 28 00 <74> 08 48 89 df e8 55 94 6a 00 48 8b 3b be fc ff ff ff e8 28 04 00 RSP: 0018:ffffc9000833f688 EFLAGS: 00000246 ORIG_RAX: ffffffffffffff13 RAX: 1ffff110145b84c1 RBX: ffff8880a2dc2608 RCX: 0000000000000000 RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffffea00028d6940 RBP: ffffc9000833f6c0 R08: dffffc0000000000 R09: fffffbfff124248a R10: fffffbfff124248a R11: 0000000000000000 R12: ffff8880a2dc26a0 R13: dffffc0000000000 R14: 1ffff110145b84d4 R15: ffff88809014d778 release_task_stack kernel/fork.c:440 [inline] put_task_stack+0xa3/0x130 kernel/fork.c:451 finish_task_switch+0x3f1/0x550 kernel/sched/core.c:3256 context_switch kernel/sched/core.c:3388 [inline] __schedule+0x9a8/0xcc0 kernel/sched/core.c:4081 preempt_schedule_irq+0xc1/0x140 kernel/sched/core.c:4338 retint_kernel+0x1b/0x2b RIP: 0010:arch_local_irq_restore arch/x86/include/asm/paravirt.h:752 [inline] RIP: 0010:lock_is_held_type+0x25c/0x2b0 kernel/locking/lockdep.c:4524 Code: 68 95 2a 89 48 c1 e8 03 42 80 3c 30 00 74 0c 48 c7 c7 68 95 2a 89 e8 33 50 57 00 48 83 3d c3 be ce 07 00 74 56 4c 89 e7 57 9d <0f> 1f 44 00 00 89 d8 48 83 c4 28 5b 41 5c 41 5d 41 5e 41 5f 5d c3 RSP: 0018:ffffc9000833f8d0 EFLAGS: 00000286 ORIG_RAX: ffffffffffffff13 RAX: 1ffffffff12552ad RBX: 0000000000000000 RCX: ffffffff815bd3c7 RDX: dffffc0000000000 RSI: ffff88809f1eed18 RDI: 0000000000000286 RBP: ffffc9000833f920 R08: dffffc0000000000 R09: fffffbfff12c962d R10: fffffbfff12c962d R11: 0000000000000000 R12: 0000000000000286 R13: ffff88809f1eec54 R14: dffffc0000000000 R15: 1ffff11013e3dd8a lock_is_held include/linux/lockdep.h:361 [inline] ___might_sleep+0x3e/0x5e0 kernel/sched/core.c:6765 __might_sleep+0x8f/0x100 kernel/sched/core.c:6753 slab_pre_alloc_hook mm/slab.h:565 [inline] slab_alloc_node mm/slab.c:3227 [inline] kmem_cache_alloc_node_trace+0x63/0x2d0 mm/slab.c:3593 __do_kmalloc_node mm/slab.c:3615 [inline] __kmalloc_node mm/slab.c:3623 [inline] kmalloc_array_node include/linux/slab.h:633 [inline] kcalloc_node include/linux/slab.h:638 [inline] alloc_alien_cache mm/slab.c:655 [inline] setup_kmem_cache_node+0xa2/0x520 mm/slab.c:883 setup_kmem_cache_nodes mm/slab.c:3772 [inline] __do_tune_cpucache+0x242/0x350 mm/slab.c:3842 do_tune_cpucache+0x25/0xf0 mm/slab.c:3851 enable_cpucache+0x96/0xc0 mm/slab.c:3932 setup_cpu_cache+0x27/0x2e0 mm/slab.c:1746 __kmem_cache_create+0x470/0x4b0 mm/slab.c:2071 create_cache+0x166/0x250 mm/slab_common.c:407 memcg_create_kmem_cache+0x135/0x160 mm/slab_common.c:680 memcg_kmem_cache_create_func+0x5b/0xb0 mm/memcontrol.c:2697 process_one_work+0x7ef/0x10d0 kernel/workqueue.c:2264 worker_thread+0xc01/0x1630 kernel/workqueue.c:2410 kthread+0x332/0x350 kernel/kthread.c:255 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:352