rcu: INFO: rcu_preempt self-detected stall on CPU rcu: 0-...!: (1 GPs behind) idle=44e/1/0x4000000000000004 softirq=55065/55069 fqs=56 (t=10501 jiffies g=58641 q=1119) rcu: rcu_preempt kthread starved for 10386 jiffies! g58641 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x0 ->cpu=1 rcu: RCU grace-period kthread stack dump: rcu_preempt R running task 29040 10 2 0x80004000 Call Trace: context_switch kernel/sched/core.c:3384 [inline] __schedule+0x76e/0x17d0 kernel/sched/core.c:4056 schedule+0xd9/0x260 kernel/sched/core.c:4123 schedule_timeout+0x486/0xc50 kernel/time/timer.c:1893 rcu_gp_fqs_loop kernel/rcu/tree.c:1639 [inline] rcu_gp_kthread+0x9b2/0x18c0 kernel/rcu/tree.c:1799 kthread+0x361/0x430 kernel/kthread.c:255 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:352 NMI backtrace for cpu 0 CPU: 0 PID: 26952 Comm: syz-executor.2 Not tainted 5.3.0+ #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+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:2795 [inline] rcu_sched_clock_irq.cold+0x4fd/0xc0a kernel/rcu/tree.c:2244 update_process_times+0x2d/0x70 kernel/time/timer.c:1724 tick_sched_handle+0xa2/0x190 kernel/time/tick-sched.c:167 tick_sched_timer+0x53/0x140 kernel/time/tick-sched.c:1299 __run_hrtimer kernel/time/hrtimer.c:1514 [inline] __hrtimer_run_queues+0x364/0xe40 kernel/time/hrtimer.c:1576 hrtimer_interrupt+0x314/0x770 kernel/time/hrtimer.c:1638 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1110 [inline] smp_apic_timer_interrupt+0x160/0x610 arch/x86/kernel/apic/apic.c:1135 apic_timer_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:830 RIP: 0010:__raw_spin_unlock_irq include/linux/spinlock_api_smp.h:169 [inline] RIP: 0010:_raw_spin_unlock_irq+0x54/0x90 kernel/locking/spinlock.c:199 Code: c0 70 18 f3 88 48 ba 00 00 00 00 00 fc ff df 48 c1 e8 03 80 3c 10 00 75 33 48 83 3d 85 06 b1 01 00 74 20 fb 66 0f 1f 44 00 00 01 00 00 00 e8 a2 6a 0c fa 65 8b 05 03 ec bf 78 85 c0 74 06 41 RSP: 0018:ffff8880ae809dd0 EFLAGS: 00000286 ORIG_RAX: ffffffffffffff13 RAX: 1ffffffff11e630e RBX: ffffffff85c8ef40 RCX: 0000000000000002 RDX: dffffc0000000000 RSI: 0000000000000008 RDI: ffff88803fd74b94 RBP: ffff8880ae809dd8 R08: 1ffffffff14ee92c R09: fffffbfff14ee92d R10: fffffbfff14ee92c R11: ffffffff8a774967 R12: ffff8880ae824c00 R13: ffff8880402599c8 R14: ffff8880ae824c00 R15: dffffc0000000000 expire_timers kernel/time/timer.c:1448 [inline] __run_timers kernel/time/timer.c:1771 [inline] __run_timers kernel/time/timer.c:1738 [inline] run_timer_softirq+0x6ae/0x17f0 kernel/time/timer.c:1784 __do_softirq+0x262/0x98c kernel/softirq.c:292 invoke_softirq kernel/softirq.c:373 [inline] irq_exit+0x19b/0x1e0 kernel/softirq.c:413 exiting_irq arch/x86/include/asm/apic.h:536 [inline] smp_apic_timer_interrupt+0x1a3/0x610 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+0xab/0x320 mm/slab.c:3694 Code: e8 1a 27 00 00 84 c0 74 77 41 f7 c6 00 02 00 00 74 4f e8 98 85 cb ff 48 83 3d 70 93 46 07 00 0f 84 fa 01 00 00 4c 89 f7 57 9d <0f> 1f 44 00 00 4c 8b 6d 08 0f 1f 44 00 00 65 8b 05 40 0e 55 7e 83 RSP: 0018:ffff88802ecf7680 EFLAGS: 00000286 ORIG_RAX: ffffffffffffff13 RAX: 0000000000000007 RBX: ffff8880888ded98 RCX: 0000000000000006 RDX: 0000000000000000 RSI: 0000000000000008 RDI: 0000000000000286 RBP: ffff88802ecf76a0 R08: 1ffffffff14ee92c R09: fffffbfff14ee92d R10: fffffbfff14ee92c R11: ffffffff8a774967 R12: ffff8880aa413e00 R13: ffffffff81a2d72d R14: 0000000000000286 R15: ffffc900019b7000 merge_or_add_vmap_area mm/vmalloc.c:727 [inline] __free_vmap_area+0x92d/0x1dd0 mm/vmalloc.c:1177 __purge_vmap_area_lazy+0x1fc/0x3b0 mm/vmalloc.c:1285 _vm_unmap_aliases mm/vmalloc.c:1696 [inline] _vm_unmap_aliases+0x39b/0x480 mm/vmalloc.c:1661 vm_unmap_aliases+0x19/0x20 mm/vmalloc.c:1719 change_page_attr_set_clr+0x22e/0x7e0 arch/x86/mm/pageattr.c:1709 change_page_attr_clear arch/x86/mm/pageattr.c:1766 [inline] set_memory_ro+0x7b/0xa0 arch/x86/mm/pageattr.c:1899 bpf_jit_binary_lock_ro include/linux/filter.h:780 [inline] bpf_int_jit_compile+0x776/0xd2a arch/x86/net/bpf_jit_comp.c:1167 bpf_prog_select_runtime+0x4cd/0x7d0 kernel/bpf/core.c:1729 bpf_migrate_filter net/core/filter.c:1275 [inline] bpf_prepare_filter net/core/filter.c:1323 [inline] bpf_prepare_filter+0x977/0xd60 net/core/filter.c:1289 __get_filter+0x212/0x2c0 net/core/filter.c:1492 sk_attach_filter+0x1e/0xa0 net/core/filter.c:1507 sock_setsockopt+0x1f72/0x2290 net/core/sock.c:999 __sys_setsockopt+0x440/0x4c0 net/socket.c:2080 __do_sys_setsockopt net/socket.c:2100 [inline] __se_sys_setsockopt net/socket.c:2097 [inline] __x64_sys_setsockopt+0xbe/0x150 net/socket.c:2097 do_syscall_64+0xfa/0x760 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x4598e9 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:00007ff9fd0e2c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000036 RAX: ffffffffffffffda RBX: 0000000000000005 RCX: 00000000004598e9 RDX: 000000000000001a RSI: 0000000000000001 RDI: 0000000000000006 RBP: 000000000075bf20 R08: 0000000000000010 R09: 0000000000000000 R10: 0000000020000480 R11: 0000000000000246 R12: 00007ff9fd0e36d4 R13: 00000000004c7b72 R14: 00000000004dd770 R15: 00000000ffffffff