rcu: INFO: rcu_preempt self-detected stall on CPU rcu: 1-...!: (10498 ticks this GP) idle=9b2/1/0x4000000000000004 softirq=67846/67846 fqs=2 (t=10501 jiffies g=93813 q=103) rcu: rcu_preempt kthread starved for 10498 jiffies! g93813 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x0 ->cpu=0 rcu: RCU grace-period kthread stack dump: rcu_preempt R running task 28952 10 2 0x80004000 Call Trace: context_switch kernel/sched/core.c:3384 [inline] __schedule+0x74b/0xb80 kernel/sched/core.c:4069 schedule+0x131/0x1e0 kernel/sched/core.c:4136 schedule_timeout+0x14f/0x240 kernel/time/timer.c:1895 rcu_gp_fqs_loop kernel/rcu/tree.c:1639 [inline] rcu_gp_kthread+0xed8/0x1770 kernel/rcu/tree.c:1799 kthread+0x332/0x350 kernel/kthread.c:255 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:352 NMI backtrace for cpu 1 CPU: 1 PID: 6142 Comm: syz-executor.2 Not tainted 5.4.0-rc1 #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+0x1d8/0x2f8 lib/dump_stack.c:113 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:2795 [inline] rcu_sched_clock_irq+0xe22/0x1ae0 kernel/rcu/tree.c:2244 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:1299 __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:830 RIP: 0010:qdisc_root_sleeping include/net/sch_generic.h:504 [inline] RIP: 0010:pie_timer+0x6d/0x7d0 net/sched/sch_pie.c:447 Code: 40 48 89 d8 48 c1 e8 03 42 80 3c 20 00 74 08 48 89 df e8 26 61 ab fb 48 8b 1b 48 83 c3 10 48 89 d8 48 c1 e8 03 42 80 3c 20 00 <74> 08 48 89 df e8 09 61 ab fb bf e8 00 00 00 48 03 3b 48 89 7d 88 RSP: 0018:ffff8880aeb09cb0 EFLAGS: 00000246 ORIG_RAX: ffffffffffffff13 RAX: 1ffff110127e940a RBX: ffff888093f4a050 RCX: ffff888045c6c4c0 RDX: 0000000000000101 RSI: 0000000000000000 RDI: ffff888086f11100 RBP: ffff8880aeb09d40 R08: ffffffff8163567b R09: ffffed1015d66b05 R10: ffffed1015d66b05 R11: 0000000000000000 R12: dffffc0000000000 R13: 0000000000000101 R14: ffff888086f11100 R15: ffff888086f10dc0 call_timer_fn+0x95/0x170 kernel/time/timer.c:1404 expire_timers kernel/time/timer.c:1449 [inline] __run_timers+0x7b6/0x990 kernel/time/timer.c:1773 run_timer_softirq+0x4a/0x90 kernel/time/timer.c:1786 __do_softirq+0x333/0x7c4 arch/x86/include/asm/paravirt.h:766 invoke_softirq kernel/softirq.c:373 [inline] irq_exit+0x227/0x230 kernel/softirq.c:413 exiting_irq arch/x86/include/asm/apic.h:536 [inline] smp_apic_timer_interrupt+0x113/0x280 arch/x86/kernel/apic/apic.c:1137 apic_timer_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:830 RIP: 0010:arch_local_irq_restore arch/x86/include/asm/paravirt.h:756 [inline] RIP: 0010:kmem_cache_free+0xc8/0xf0 mm/slab.c:3694 Code: de 06 00 74 42 4c 89 f7 57 9d 0f 1f 44 00 00 e8 2e b5 cc ff eb 19 e8 c7 b2 cc ff 48 83 3d 0f a2 de 06 00 74 24 4c 89 f7 57 9d <0f> 1f 44 00 00 4c 89 e7 4c 89 fe e8 58 01 00 00 5b 41 5c 41 5e 41 RSP: 0018:ffff88805041f7b0 EFLAGS: 00000286 ORIG_RAX: ffffffffffffff13 RAX: ffff888045c6cd54 RBX: ffff8880aa413e00 RCX: ffffffff8158d0d7 RDX: 0000000000000000 RSI: 0000000000000008 RDI: 0000000000000286 RBP: ffff88805041f7d0 R08: ffff888045c6cd18 R09: fffffbfff12bb69d R10: fffffbfff12bb69d R11: 0000000000000000 R12: ffffffff81a36b8d R13: dffffc0000000000 R14: 0000000000000286 R15: ffff888059bfac00 merge_or_add_vmap_area mm/vmalloc.c:724 [inline] __purge_vmap_area_lazy+0x5ed/0x18d0 mm/vmalloc.c:1287 _vm_unmap_aliases+0x43a/0x4c0 mm/vmalloc.c:1704 vm_unmap_aliases+0x19/0x20 mm/vmalloc.c:1727 change_page_attr_set_clr+0x267/0x650 arch/x86/mm/pageattr.c:1709 change_page_attr_clear arch/x86/mm/pageattr.c:1766 [inline] set_memory_ro+0x66/0x90 arch/x86/mm/pageattr.c:1899 bpf_jit_binary_lock_ro include/linux/filter.h:780 [inline] bpf_int_jit_compile+0x762c/0x7a80 arch/x86/net/bpf_jit_comp.c:1167 bpf_prog_select_runtime+0x756/0xa50 kernel/bpf/core.c:1729 bpf_migrate_filter net/core/filter.c:1275 [inline] bpf_prepare_filter+0xfd9/0x1270 net/core/filter.c:1323 __get_filter+0x2f0/0x410 net/core/filter.c:1492 sk_attach_filter+0x23/0x140 net/core/filter.c:1507 sock_setsockopt+0x1cd0/0x2920 net/core/sock.c:999 __sys_setsockopt+0x4de/0x720 net/socket.c:2080 __do_sys_setsockopt net/socket.c:2100 [inline] __se_sys_setsockopt net/socket.c:2097 [inline] __x64_sys_setsockopt+0xbf/0xd0 net/socket.c:2097 do_syscall_64+0xf7/0x1c0 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x459a29 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:00007f2cc667ac78 EFLAGS: 00000246 ORIG_RAX: 0000000000000036 RAX: ffffffffffffffda RBX: 0000000000000005 RCX: 0000000000459a29 RDX: 000000000000001a RSI: 0000000000000001 RDI: 0000000000000004 RBP: 000000000075bf20 R08: 0000000000000010 R09: 0000000000000000 R10: 0000000020b86000 R11: 0000000000000246 R12: 00007f2cc667b6d4 R13: 00000000004c7ef0 R14: 00000000004ddfd8 R15: 00000000ffffffff