rcu: INFO: rcu_preempt self-detected stall on CPU rcu: 0-...!: (1 GPs behind) idle=612/1/0x4000000000000002 softirq=13045/13050 fqs=24 (t=10500 jiffies g=6725 q=826) rcu: rcu_preempt kthread starved for 10447 jiffies! g6725 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x0 ->cpu=1 rcu: RCU grace-period kthread stack dump: rcu_preempt R running task 29032 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: 8384 Comm: syz-executor.0 Not tainted 5.4.0-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __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:1514 [inline] __hrtimer_run_queues+0x403/0x840 kernel/time/hrtimer.c:1576 hrtimer_interrupt+0x38c/0xda0 kernel/time/hrtimer.c:1638 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 RIP: 0010:mod_memcg_page_state+0x161/0x190 include/linux/memcontrol.h:655 Code: 3c 20 00 74 0c 48 c7 c7 28 96 0a 89 e8 a8 9e 69 00 48 83 3d c8 21 c2 07 00 74 2d e8 99 27 2e 00 4c 89 ff 57 9d 0f 1f 44 00 00 <5b> 41 5c 41 5e 41 5f 5d c3 e8 81 27 2e 00 0f 0b e8 7a 27 2e 00 0f RSP: 0018:ffffc90002a671a8 EFLAGS: 00000246 ORIG_RAX: ffffffffffffff13 RAX: ffffffff81487433 RBX: 0000000000000000 RCX: 0000000000040000 RDX: ffffc90001ef9000 RSI: 000000000003ffff RDI: 0000000000040000 RBP: ffffc90002a671c8 R08: 000000000003a768 R09: ffffed1011ed8e7f R10: ffffed1011ed8e7f R11: 0000000000000000 R12: dffffc0000000000 R13: dffffc0000000000 R14: 00000000fffffffc R15: ffff88808f6c73e8 free_thread_stack+0x168/0x590 kernel/fork.c:280 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:rmqueue_pcplist+0x2c23/0x2d20 mm/page_alloc.c:3257 Code: 03 80 3c 18 00 74 0c 48 c7 c7 28 96 0a 89 e8 64 a2 07 00 48 83 3d 84 25 60 07 00 0f 84 f8 00 00 00 48 8b bd e8 fe ff ff 57 9d <0f> 1f 44 00 00 65 48 8b 04 25 28 00 00 00 48 3b 45 d0 0f 85 d0 00 RSP: 0018:ffffc90002a67428 EFLAGS: 00000286 ORIG_RAX: ffffffffffffff02 RAX: 1ffffffff12152c5 RBX: dffffc0000000000 RCX: 0000000000040000 RDX: ffffc90001ef9000 RSI: 00000000000052b0 RDI: 0000000000000286 RBP: ffffc90002a67718 R08: ffff88808861c898 R09: fffff94000525e37 R10: fffff94000525e37 R11: 0000000000000000 R12: ffff88812fffb6c0 R13: 0000000000000000 R14: ffffea000292f180 R15: 0000000000000000 rmqueue+0x49/0x2080 mm/page_alloc.c:3274 get_page_from_freelist+0x746/0xaa0 mm/page_alloc.c:3692 __alloc_pages_nodemask+0x264/0x5d0 mm/page_alloc.c:4756 alloc_pages_current+0x2db/0x500 mm/mempolicy.c:2207 alloc_pages include/linux/gfp.h:532 [inline] __vmalloc_area_node mm/vmalloc.c:2483 [inline] __vmalloc_node_range+0x42f/0x940 mm/vmalloc.c:2547 __vmalloc_node mm/vmalloc.c:2607 [inline] __vmalloc_node_flags_caller+0x7e/0x90 mm/vmalloc.c:2629 __bpf_map_area_alloc+0xe2/0x100 kernel/bpf/syscall.c:161 bpf_map_area_alloc+0x1f/0x30 kernel/bpf/syscall.c:168 prealloc_init kernel/bpf/hashtab.c:142 [inline] htab_map_alloc+0x6e5/0x12d0 kernel/bpf/hashtab.c:378 find_and_alloc_map kernel/bpf/syscall.c:123 [inline] map_create kernel/bpf/syscall.c:654 [inline] __do_sys_bpf+0x354a/0xc890 kernel/bpf/syscall.c:3012 __se_sys_bpf kernel/bpf/syscall.c:2989 [inline] __x64_sys_bpf+0x7a/0x90 kernel/bpf/syscall.c:2989 do_syscall_64+0xf7/0x1c0 arch/x86/entry/common.c:294 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x45a679 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:00007fe620212c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000141 RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 000000000045a679 RDX: 000000000000003c RSI: 0000000020001b00 RDI: 0000000000000000 RBP: 000000000075bf20 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00007fe6202136d4 R13: 00000000004c0c65 R14: 00000000004d4730 R15: 00000000ffffffff