rcu: INFO: rcu_preempt self-detected stall on CPU rcu: 0-...!: (10501 ticks this GP) idle=db2/1/0x4000000000000004 softirq=125486/125486 fqs=0 (t=10502 jiffies g=166389 q=70) rcu: rcu_preempt kthread starved for 10503 jiffies! g166389 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x0 ->cpu=0 rcu: RCU grace-period kthread stack dump: rcu_preempt R running task 29096 10 2 0x80004000 Call Trace: context_switch kernel/sched/core.c:3254 [inline] __schedule+0x755/0x1580 kernel/sched/core.c:3880 schedule+0xd9/0x260 kernel/sched/core.c:3947 schedule_timeout+0x486/0xc50 kernel/time/timer.c:1807 rcu_gp_fqs_loop kernel/rcu/tree.c:1611 [inline] rcu_gp_kthread+0x9b2/0x18c0 kernel/rcu/tree.c:1768 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: 26724 Comm: syz-executor.0 Not tainted 5.3.0-rc8+ #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:2736 [inline] rcu_sched_clock_irq.cold+0x4dd/0xc13 kernel/rcu/tree.c:2183 update_process_times+0x32/0x80 kernel/time/timer.c:1639 tick_sched_handle+0xa2/0x190 kernel/time/tick-sched.c:167 tick_sched_timer+0x53/0x140 kernel/time/tick-sched.c:1296 __run_hrtimer kernel/time/hrtimer.c:1389 [inline] __hrtimer_run_queues+0x364/0xe40 kernel/time/hrtimer.c:1451 hrtimer_interrupt+0x314/0x770 kernel/time/hrtimer.c:1509 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1106 [inline] smp_apic_timer_interrupt+0x160/0x610 arch/x86/kernel/apic/apic.c:1131 apic_timer_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:830 RIP: 0010:pie_timer+0x0/0x830 net/sched/sch_pie.c:444 Code: 00 00 00 00 00 48 8d bb 40 03 00 00 e8 d9 b9 9b fb 5b 5d c3 e8 31 fc e5 fb eb e0 0f 1f 44 00 00 66 2e 0f 1f 84 00 00 00 00 00 <55> 48 89 e5 41 57 41 56 41 55 41 54 53 48 89 fb 48 83 ec 60 48 89 RSP: 0018:ffff8880ae809d08 EFLAGS: 00000206 ORIG_RAX: ffffffffffffff13 RAX: ffffffff85c68780 RBX: ffff8880482b5a00 RCX: ffffffff81624cf5 RDX: 0000000000000100 RSI: ffffffff81624880 RDI: ffff8880482b5a00 RBP: ffff8880ae809dd8 R08: ffff8880592fc440 R09: fffffbfff134afb0 R10: fffffbfff134afaf R11: ffffffff89a57d7f R12: 0000000000000102 R13: ffff8880ae809db0 R14: 0000000000000000 R15: dffffc0000000000 expire_timers kernel/time/timer.c:1366 [inline] __run_timers kernel/time/timer.c:1685 [inline] __run_timers kernel/time/timer.c:1653 [inline] run_timer_softirq+0x697/0x17a0 kernel/time/timer.c:1698 __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:537 [inline] smp_apic_timer_interrupt+0x1a3/0x610 arch/x86/kernel/apic/apic.c:1133 apic_timer_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:830 RIP: 0010:__sanitizer_cov_trace_pc+0x44/0x50 kernel/kcov.c:109 Code: 48 8b 75 08 75 2b 8b 90 f0 12 00 00 83 fa 02 75 20 48 8b 88 f8 12 00 00 8b 80 f4 12 00 00 48 8b 11 48 83 c2 01 48 39 d0 76 07 <48> 89 34 d1 48 89 11 5d c3 0f 1f 00 65 4c 8b 04 25 40 fe 01 00 65 RSP: 0018:ffff88804221f348 EFLAGS: 00000202 ORIG_RAX: ffffffffffffff13 RAX: 0000000000040000 RBX: 0000000000000000 RCX: ffffc90005f97000 RDX: 0000000000014de0 RSI: ffffffff8132da33 RDI: 0000000000000007 RBP: ffff88804221f348 R08: ffff8880592fc440 R09: ffffed1008443e59 R10: ffffed1008443e58 R11: 0000000000000003 R12: 8000000000000163 R13: dffffc0000000000 R14: 0000000000000034 R15: 0000000000000001 __pte_needs_invert arch/x86/include/asm/pgtable-invert.h:18 [inline] protnone_mask arch/x86/include/asm/pgtable-invert.h:24 [inline] pfn_pte arch/x86/include/asm/pgtable.h:568 [inline] split_set_pte arch/x86/mm/pageattr.c:936 [inline] __split_large_page arch/x86/mm/pageattr.c:1002 [inline] split_large_page arch/x86/mm/pageattr.c:1057 [inline] __change_page_attr arch/x86/mm/pageattr.c:1555 [inline] __change_page_attr_set_clr+0x16c3/0x2e20 arch/x86/mm/pageattr.c:1636 cpa_process_alias arch/x86/mm/pageattr.c:1587 [inline] __change_page_attr_set_clr+0x1d6b/0x2e20 arch/x86/mm/pageattr.c:1643 change_page_attr_set_clr+0x36b/0x8c0 arch/x86/mm/pageattr.c:1729 change_page_attr_clear arch/x86/mm/pageattr.c:1766 [inline] set_memory_ro+0x7b/0xa0 arch/x86/mm/pageattr.c:1993 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_prog_load+0xe9b/0x1660 kernel/bpf/syscall.c:1702 __do_sys_bpf+0xc43/0x3460 kernel/bpf/syscall.c:2855 __se_sys_bpf kernel/bpf/syscall.c:2814 [inline] __x64_sys_bpf+0x73/0xb0 kernel/bpf/syscall.c:2814 do_syscall_64+0xfd/0x6a0 arch/x86/entry/common.c:296 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:00007f54edb61c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000141 RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 00000000004598e9 RDX: 0000000000000048 RSI: 00000000200054c0 RDI: 0000000000000005 RBP: 000000000075bf20 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00007f54edb626d4 R13: 00000000004bfd15 R14: 00000000004d1a58 R15: 00000000ffffffff