rcu: INFO: rcu_preempt self-detected stall on CPU rcu: 1-...!: (10499 ticks this GP) idle=ac2/1/0x4000000000000000 softirq=301276/301281 fqs=1 (t=10500 jiffies g=568969 q=115) rcu: rcu_preempt kthread starved for 10498 jiffies! g568969 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x0 ->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:R running task stack:28208 pid: 14 ppid: 2 flags:0x00004000 Call Trace: context_switch kernel/sched/core.c:4339 [inline] __schedule+0x916/0x23e0 kernel/sched/core.c:5147 schedule+0xcf/0x270 kernel/sched/core.c:5226 schedule_timeout+0x14a/0x250 kernel/time/timer.c:1892 rcu_gp_fqs_loop kernel/rcu/tree.c:2004 [inline] rcu_gp_kthread+0xd07/0x2300 kernel/rcu/tree.c:2177 kthread+0x3b1/0x4a0 kernel/kthread.c:313 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:294 rcu: Stack dump where RCU GP kthread last ran: Sending NMI from CPU 1 to CPUs 0: NMI backtrace for cpu 0 CPU: 0 PID: 27573 Comm: syz-executor.4 Not tainted 5.12.0-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:native_apic_mem_write+0x8/0x10 arch/x86/include/asm/apic.h:110 Code: c7 40 d7 44 8f e8 c8 c8 87 00 eb b0 66 0f 1f 44 00 00 be 01 00 00 00 e9 76 ab 2c 00 cc cc cc cc cc cc 89 ff 89 b7 00 c0 5f ff 0f 1f 80 00 00 00 00 48 b8 00 00 00 00 00 fc ff df 53 89 fb 48 RSP: 0018:ffffc90000007ea8 EFLAGS: 00000046 RAX: dffffc0000000000 RBX: ffffffff8b0e78c0 RCX: 0000000000000020 RDX: 1ffffffff161cf1a RSI: 0000000000000099 RDI: 0000000000000380 RBP: ffff8880b9c1f2c0 R08: 000000000000003f R09: 0000000000000000 R10: ffffffff8167b997 R11: 0000000000000000 R12: 0000000000000099 R13: 0000000000000020 R14: ffff8880b9c26380 R15: 7fffffffffffffff FS: 00007f4e06113700(0000) GS:ffff8880b9c00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000000000051afb0 CR3: 000000002d348000 CR4: 00000000001506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600 Call Trace: apic_write arch/x86/include/asm/apic.h:393 [inline] lapic_next_event+0x4d/0x80 arch/x86/kernel/apic/apic.c:472 clockevents_program_event+0x254/0x370 kernel/time/clockevents.c:334 tick_program_event+0xac/0x140 kernel/time/tick-oneshot.c:44 hrtimer_interrupt+0x414/0xa00 kernel/time/hrtimer.c:1676 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 sysvec_apic_timer_interrupt+0x8e/0xc0 arch/x86/kernel/apic/apic.c:1100 asm_sysvec_apic_timer_interrupt+0x12/0x20 arch/x86/include/asm/idtentry.h:632 RIP: 0010:pv_wait_head_or_lock kernel/locking/qspinlock_paravirt.h:434 [inline] RIP: 0010:__pv_queued_spin_lock_slowpath+0x3ba/0xb40 kernel/locking/qspinlock.c:508 Code: eb c6 45 01 01 41 bc 00 80 00 00 48 c1 e9 03 83 e3 07 41 be 01 00 00 00 48 b8 00 00 00 00 00 fc ff df 4c 8d 2c 01 eb 0c f3 90 <41> 83 ec 01 0f 84 72 04 00 00 41 0f b6 45 00 38 d8 7f 08 84 c0 0f RSP: 0018:ffffc9000186f6c8 EFLAGS: 00000206 RAX: 0000000000000003 RBX: 0000000000000000 RCX: 1ffffffff1812820 RDX: 0000000000000001 RSI: ffffffff817acfb1 RDI: ffffffff8132b571 RBP: ffffffff8c094100 R08: 0000000000000001 R09: 0000000000000001 R10: ffffffff817acf79 R11: 0000000000000000 R12: 000000000000080f R13: fffffbfff1812820 R14: 0000000000000001 R15: ffff8880b9c36040 pv_queued_spin_lock_slowpath arch/x86/include/asm/paravirt.h:585 [inline] queued_spin_lock_slowpath arch/x86/include/asm/qspinlock.h:51 [inline] queued_spin_lock include/asm-generic/qspinlock.h:85 [inline] do_raw_spin_lock+0x200/0x2b0 kernel/locking/spinlock_debug.c:113 spin_lock include/linux/spinlock.h:354 [inline] preload_this_cpu_lock mm/vmalloc.c:1450 [inline] alloc_vmap_area+0x1ba/0x1e10 mm/vmalloc.c:1491 __get_vm_area_node+0x128/0x380 mm/vmalloc.c:2370 __vmalloc_node_range+0x135/0x970 mm/vmalloc.c:2906 __vmalloc_node mm/vmalloc.c:2963 [inline] __vmalloc+0x69/0x80 mm/vmalloc.c:2977 bpf_prog_alloc_no_stats+0x39/0x360 kernel/bpf/core.c:85 bpf_prog_alloc+0x28/0x1a0 kernel/bpf/core.c:119 bpf_prog_load+0x64f/0x2160 kernel/bpf/syscall.c:2207 __sys_bpf+0x65a/0x5390 kernel/bpf/syscall.c:4455 __do_sys_bpf kernel/bpf/syscall.c:4559 [inline] __se_sys_bpf kernel/bpf/syscall.c:4557 [inline] __x64_sys_bpf+0x75/0xb0 kernel/bpf/syscall.c:4557 do_syscall_64+0x3a/0xb0 arch/x86/entry/common.c:47 entry_SYSCALL_64_after_hwframe+0x44/0xae RIP: 0033:0x4665d9 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:00007f4e06113188 EFLAGS: 00000246 ORIG_RAX: 0000000000000141 RAX: ffffffffffffffda RBX: 000000000056bf80 RCX: 00000000004665d9 RDX: 0000000000000070 RSI: 0000000020000040 RDI: 0000000000000005 RBP: 00000000004bfcb9 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 000000000056bf80 R13: 00007ffddcfba00f R14: 00007f4e06113300 R15: 0000000000022000 NMI backtrace for cpu 1 CPU: 1 PID: 27571 Comm: syz-executor.2 Not tainted 5.12.0-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+0x141/0x1d7 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+0x25e/0x3f0 kernel/rcu/tree_stall.h:341 print_cpu_stall kernel/rcu/tree_stall.h:624 [inline] check_cpu_stall kernel/rcu/tree_stall.h:699 [inline] rcu_pending kernel/rcu/tree.c:3911 [inline] rcu_sched_clock_irq.cold+0x3f1/0x74b kernel/rcu/tree.c:2649 update_process_times+0x16d/0x200 kernel/time/timer.c:1796 tick_sched_handle+0x9b/0x180 kernel/time/tick-sched.c:226 tick_sched_timer+0x1b0/0x2d0 kernel/time/tick-sched.c:1373 __run_hrtimer kernel/time/hrtimer.c:1537 [inline] __hrtimer_run_queues+0x1c0/0xe40 kernel/time/hrtimer.c:1601 hrtimer_interrupt+0x330/0xa00 kernel/time/hrtimer.c:1663 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 sysvec_apic_timer_interrupt+0x40/0xc0 arch/x86/kernel/apic/apic.c:1100 asm_sysvec_apic_timer_interrupt+0x12/0x20 arch/x86/include/asm/idtentry.h:632 RIP: 0010:mac80211_hwsim_tx_frame_no_nl.isra.0+0x77b/0x1330 drivers/net/wireless/mac80211_hwsim.c:1525 Code: 00 00 00 c6 84 24 98 00 00 00 00 74 bb e8 2d 7c 4c fc 48 8d bb a4 3c 00 00 48 89 f8 48 89 fa 48 c1 e8 03 83 e2 07 0f b6 04 28 <38> d0 7f 08 84 c0 0f 85 36 09 00 00 44 0f b6 bb a4 3c 00 00 31 ff RSP: 0018:ffffc90000dc0ba0 EFLAGS: 00000202 RAX: 0000000000000000 RBX: ffff888033d9b1e0 RCX: 0000000000000100 RDX: 0000000000000004 RSI: ffffffff85284683 RDI: ffff888033d9ee84 RBP: dffffc0000000000 R08: 0000000000000005 R09: 0000000000000000 R10: ffffffff852846b9 R11: 0000000000000000 R12: ffff88808ad4b640 R13: ffff888059b0b410 R14: ffff888059b0b1e0 R15: 0000000000000000 mac80211_hwsim_tx_frame+0x14f/0x1e0 drivers/net/wireless/mac80211_hwsim.c:1775 mac80211_hwsim_beacon_tx+0x4ba/0x910 drivers/net/wireless/mac80211_hwsim.c:1829 __iterate_interfaces+0x1e5/0x520 net/mac80211/util.c:793 ieee80211_iterate_active_interfaces_atomic+0x8d/0x170 net/mac80211/util.c:829 mac80211_hwsim_beacon+0xd5/0x1a0 drivers/net/wireless/mac80211_hwsim.c:1852 __run_hrtimer kernel/time/hrtimer.c:1537 [inline] __hrtimer_run_queues+0x609/0xe40 kernel/time/hrtimer.c:1601 hrtimer_run_softirq+0x17b/0x360 kernel/time/hrtimer.c:1618 __do_softirq+0x29b/0x9f6 kernel/softirq.c:559 invoke_softirq kernel/softirq.c:433 [inline] __irq_exit_rcu+0x136/0x200 kernel/softirq.c:637 irq_exit_rcu+0x5/0x20 kernel/softirq.c:649 sysvec_apic_timer_interrupt+0x93/0xc0 arch/x86/kernel/apic/apic.c:1100 asm_sysvec_apic_timer_interrupt+0x12/0x20 arch/x86/include/asm/idtentry.h:632 RIP: 0010:__sanitizer_cov_trace_pc+0x59/0x60 kernel/kcov.c:205 Code: 74 2b 8b 82 18 15 00 00 83 f8 02 75 20 48 8b 8a 20 15 00 00 8b 92 1c 15 00 00 48 8b 01 48 83 c0 01 48 39 c2 76 07 48 89 34 c1 <48> 89 01 c3 0f 1f 00 41 55 41 54 49 89 fc 55 48 bd eb 83 b5 80 46 RSP: 0018:ffffc900017bf558 EFLAGS: 00000216 RAX: 000000000001abd9 RBX: ffff8880b9c3bb20 RCX: ffffc9000e631000 RDX: 0000000000040000 RSI: ffffffff816986f0 RDI: 0000000000000003 RBP: 0000000000000003 R08: 0000000000000000 R09: 0000000000000001 R10: ffffffff81698716 R11: 0000000000000000 R12: ffffed1017387765 R13: 0000000000000000 R14: ffff8880b9c3bb28 R15: 0000000000000001 rep_nop arch/x86/include/asm/vdso/processor.h:13 [inline] cpu_relax arch/x86/include/asm/vdso/processor.h:18 [inline] csd_lock_wait kernel/smp.c:440 [inline] smp_call_function_many_cond+0x450/0xc20 kernel/smp.c:967 on_each_cpu_cond_mask+0x56/0xa0 kernel/smp.c:1133 on_each_cpu include/linux/smp.h:71 [inline] flush_tlb_kernel_range+0x80/0xb0 arch/x86/mm/tlb.c:995 __purge_vmap_area_lazy+0x8f9/0x1c50 mm/vmalloc.c:1652 _vm_unmap_aliases.part.0+0x3dd/0x4f0 mm/vmalloc.c:2055 _vm_unmap_aliases mm/vmalloc.c:2029 [inline] vm_unmap_aliases+0x47/0x50 mm/vmalloc.c:2078 change_page_attr_set_clr+0x241/0x500 arch/x86/mm/pat/set_memory.c:1740 change_page_attr_clear arch/x86/mm/pat/set_memory.c:1797 [inline] set_memory_ro+0x78/0xa0 arch/x86/mm/pat/set_memory.c:1943 bpf_jit_binary_lock_ro include/linux/filter.h:853 [inline] bpf_int_jit_compile+0xe11/0x11b0 arch/x86/net/bpf_jit_comp.c:2329 bpf_prog_select_runtime+0x464/0x6a0 kernel/bpf/core.c:1867 bpf_prog_load+0xe94/0x2160 kernel/bpf/syscall.c:2264 __sys_bpf+0x65a/0x5390 kernel/bpf/syscall.c:4455 __do_sys_bpf kernel/bpf/syscall.c:4559 [inline] __se_sys_bpf kernel/bpf/syscall.c:4557 [inline] __x64_sys_bpf+0x75/0xb0 kernel/bpf/syscall.c:4557 do_syscall_64+0x3a/0xb0 arch/x86/entry/common.c:47 entry_SYSCALL_64_after_hwframe+0x44/0xae RIP: 0033:0x4665d9 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:00007faadc223188 EFLAGS: 00000246 ORIG_RAX: 0000000000000141 RAX: ffffffffffffffda RBX: 000000000056bf80 RCX: 00000000004665d9 RDX: 0000000000000048 RSI: 00000000200054c0 RDI: 0000000000000005 RBP: 00000000004bfcb9 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 000000000056bf80 R13: 00007ffdfb97345f R14: 00007faadc223300 R15: 0000000000022000