rcu: INFO: rcu_preempt self-detected stall on CPU rcu: 1-...!: (10501 ticks this GP) idle=bda/1/0x4000000000000000 softirq=17290/17292 fqs=0 (t=10502 jiffies g=20029 q=335) rcu: rcu_preempt kthread starved for 10503 jiffies! g20029 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x402 ->cpu=0 rcu: Unless rcu_preempt kthread gets sufficient CPU time, OOM is now expected behavior. rcu: RCU grace-period kthread stack dump: task:rcu_preempt state:I stack:29176 pid: 13 ppid: 2 flags:0x00004000 Call Trace: context_switch kernel/sched/core.c:4327 [inline] __schedule+0x90c/0x21a0 kernel/sched/core.c:5078 schedule+0xcf/0x270 kernel/sched/core.c:5157 schedule_timeout+0x148/0x250 kernel/time/timer.c:1878 rcu_gp_fqs_loop kernel/rcu/tree.c:1940 [inline] rcu_gp_kthread+0xbbe/0x1d70 kernel/rcu/tree.c:2113 kthread+0x3b1/0x4a0 kernel/kthread.c:292 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:296 NMI backtrace for cpu 1 CPU: 1 PID: 11710 Comm: syz-executor.4 Not tainted 5.11.0-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:79 [inline] dump_stack+0x107/0x163 lib/dump_stack.c:120 nmi_cpu_backtrace.cold+0x44/0xd7 lib/nmi_backtrace.c:105 nmi_trigger_cpumask_backtrace+0x1b3/0x230 lib/nmi_backtrace.c:62 trigger_single_cpu_backtrace include/linux/nmi.h:164 [inline] rcu_dump_cpu_stacks+0x1f4/0x230 kernel/rcu/tree_stall.h:337 print_cpu_stall kernel/rcu/tree_stall.h:569 [inline] check_cpu_stall kernel/rcu/tree_stall.h:643 [inline] rcu_pending kernel/rcu/tree.c:3751 [inline] rcu_sched_clock_irq.cold+0x48e/0xedf kernel/rcu/tree.c:2580 update_process_times+0x16d/0x200 kernel/time/timer.c:1782 tick_sched_handle+0x9b/0x180 kernel/time/tick-sched.c:226 tick_sched_timer+0x1b0/0x2d0 kernel/time/tick-sched.c:1369 __run_hrtimer kernel/time/hrtimer.c:1519 [inline] __hrtimer_run_queues+0x1c0/0xe40 kernel/time/hrtimer.c:1583 hrtimer_interrupt+0x334/0x940 kernel/time/hrtimer.c:1645 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1089 [inline] __sysvec_apic_timer_interrupt+0x146/0x540 arch/x86/kernel/apic/apic.c:1106 run_sysvec_on_irqstack_cond arch/x86/include/asm/irq_stack.h:91 [inline] sysvec_apic_timer_interrupt+0x48/0x100 arch/x86/kernel/apic/apic.c:1100 asm_sysvec_apic_timer_interrupt+0x12/0x20 arch/x86/include/asm/idtentry.h:629 RIP: 0010:__read_once_word_nocheck+0x3/0x10 include/asm-generic/rwonce.h:68 Code: 48 c7 c7 20 ab be 8b e8 ab a9 a5 02 e9 60 fb ff ff e8 b1 bd 83 00 e9 cf fb ff ff cc cc cc cc cc cc cc cc cc cc cc cc 48 8b 07 66 66 2e 0f 1f 84 00 00 00 00 00 90 41 57 89 d0 41 56 41 55 41 RSP: 0018:ffffc90000db0708 EFLAGS: 00000287 RAX: ffffffff81626d63 RBX: ffffc90000db0860 RCX: ffffc90000db0860 RDX: dffffc0000000000 RSI: ffffc90000db0f68 RDI: ffffc90000db0f68 RBP: ffffc90000db0f68 R08: ffffffff8e1e4e38 R09: ffffffff8e1e4e3c R10: 0000000000082083 R11: 0000000000000001 R12: ffffc90000db0818 R13: ffffc90000da9000 R14: ffffc90000db0868 R15: ffffc90000db0818 deref_stack_reg+0xee/0x150 arch/x86/kernel/unwind_orc.c:355 unwind_next_frame+0xc3b/0x1f90 arch/x86/kernel/unwind_orc.c:531 arch_stack_walk+0x7d/0xe0 arch/x86/kernel/stacktrace.c:25 stack_trace_save+0x8c/0xc0 kernel/stacktrace.c:121 kasan_save_stack+0x1b/0x40 mm/kasan/common.c:38 kasan_set_track mm/kasan/common.c:46 [inline] set_alloc_info mm/kasan/common.c:401 [inline] ____kasan_kmalloc.constprop.0+0x82/0xa0 mm/kasan/common.c:429 kasan_slab_alloc include/linux/kasan.h:209 [inline] slab_post_alloc_hook mm/slab.h:512 [inline] slab_alloc_node mm/slub.c:2892 [inline] kmem_cache_alloc_node+0x1e0/0x470 mm/slub.c:2928 __alloc_skb+0x71/0x5a0 net/core/skbuff.c:198 alloc_skb include/linux/skbuff.h:1099 [inline] ndisc_alloc_skb+0x134/0x320 net/ipv6/ndisc.c:420 ndisc_send_rs+0x388/0x700 net/ipv6/ndisc.c:686 addrconf_rs_timer+0x3f2/0x820 net/ipv6/addrconf.c:3875 call_timer_fn+0x1a5/0x6b0 kernel/time/timer.c:1417 expire_timers kernel/time/timer.c:1462 [inline] __run_timers.part.0+0x67c/0xa50 kernel/time/timer.c:1731 __run_timers kernel/time/timer.c:1712 [inline] run_timer_softirq+0xb3/0x1d0 kernel/time/timer.c:1744 __do_softirq+0x29b/0x9f6 kernel/softirq.c:343 asm_call_irq_on_stack+0xf/0x20 __run_on_irqstack arch/x86/include/asm/irq_stack.h:26 [inline] run_on_irqstack_cond arch/x86/include/asm/irq_stack.h:77 [inline] do_softirq_own_stack+0xaa/0xd0 arch/x86/kernel/irq_64.c:77 invoke_softirq kernel/softirq.c:226 [inline] __irq_exit_rcu kernel/softirq.c:420 [inline] irq_exit_rcu+0x134/0x200 kernel/softirq.c:432 sysvec_apic_timer_interrupt+0x4d/0x100 arch/x86/kernel/apic/apic.c:1100 asm_sysvec_apic_timer_interrupt+0x12/0x20 arch/x86/include/asm/idtentry.h:629 RIP: 0010:lock_is_held_type+0x0/0x120 kernel/locking/lockdep.c:5470 Code: 9e 29 a9 04 85 c0 75 e6 48 c7 c6 a0 a8 4b 89 48 c7 c7 e0 a8 4b 89 89 44 24 04 e8 f5 28 bf ff 0f 0b 8b 44 24 04 e9 08 ff ff ff <41> 57 41 56 41 55 41 bd 01 00 00 00 41 54 55 53 48 83 ec 08 8b 0d RSP: 0018:ffffc900037ef698 EFLAGS: 00000246 RAX: 0000000000000001 RBX: 0000000000000001 RCX: ffffc90011966000 RDX: 0000000000000001 RSI: 00000000ffffffff RDI: ffffffff8bd73d40 RBP: ffffffff89562500 R08: 000000000000003f R09: ffffffff8fc054a7 R10: ffffffff81aad286 R11: 0000000000000000 R12: 000000000000056b R13: ffffc90000fa6000 R14: 0000000000008000 R15: dffffc0000000000 lock_is_held include/linux/lockdep.h:271 [inline] ___might_sleep+0x202/0x2c0 kernel/sched/core.c:7932 __purge_vmap_area_lazy+0x96a/0x1c50 mm/vmalloc.c:1387 _vm_unmap_aliases.part.0+0x3d6/0x4e0 mm/vmalloc.c:1784 _vm_unmap_aliases mm/vmalloc.c:1758 [inline] vm_unmap_aliases+0x42/0x50 mm/vmalloc.c:1807 change_page_attr_set_clr+0x241/0x500 arch/x86/mm/pat/set_memory.c:1732 change_page_attr_clear arch/x86/mm/pat/set_memory.c:1789 [inline] set_memory_ro+0x78/0xa0 arch/x86/mm/pat/set_memory.c:1935 bpf_jit_binary_lock_ro include/linux/filter.h:824 [inline] bpf_int_jit_compile+0xdfa/0x11b0 arch/x86/net/bpf_jit_comp.c:2093 bpf_prog_select_runtime+0x5c5/0xb30 kernel/bpf/core.c:1809 bpf_prog_load+0xe6c/0x1f40 kernel/bpf/syscall.c:2208 __do_sys_bpf+0x1251/0x4f10 kernel/bpf/syscall.c:4382 do_syscall_64+0x2d/0x70 arch/x86/entry/common.c:46 entry_SYSCALL_64_after_hwframe+0x44/0xa9 RIP: 0033:0x466019 Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 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 73 01 c3 48 c7 c1 bc ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007fe0539ae188 EFLAGS: 00000246 ORIG_RAX: 0000000000000141 RAX: ffffffffffffffda RBX: 000000000056bf60 RCX: 0000000000466019 RDX: 0000000000000078 RSI: 0000000020000280 RDI: 0000000000000005 RBP: 00000000004bd067 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 000000000056bf60 R13: 00007ffcd7d7a24f R14: 00007fe0539ae300 R15: 0000000000022000