rcu: INFO: rcu_preempt detected stalls on CPUs/tasks: rcu: Tasks blocked on level-0 rcu_node (CPUs 0-1): (detected by 1, t=10503 jiffies, g=160517, q=137) rcu: All QSes seen, last rcu_preempt kthread activity 10504 (4295050975-4295040471), jiffies_till_next_fqs=1, root ->qsmask 0x0 rcu: rcu_preempt kthread starved for 10505 jiffies! g160517 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:28816 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: 6499 Comm: syz-executor.0 Not tainted 5.13.0-rc1-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:unwind_next_frame+0x8d0/0x1ce0 arch/x86/kernel/unwind_orc.c:470 Code: 49 0f bf 00 48 01 d0 48 89 44 24 60 e9 aa fd ff ff 49 8d 7e 40 48 b8 00 00 00 00 00 fc ff df 48 89 fa 48 c1 ea 03 80 3c 02 00 <0f> 85 a0 0f 00 00 4c 89 c0 49 8b 56 40 48 be 00 00 00 00 00 fc ff RSP: 0018:ffffc90000007378 EFLAGS: 00000046 RAX: dffffc0000000000 RBX: 1ffff92000000e77 RCX: ffffffff8ed76923 RDX: 1ffff92000000e92 RSI: 0000000000000001 RDI: ffffc90000007490 RBP: 0000000000000001 R08: ffffffff8ed7691e R09: ffffffff8ed768ee R10: fffff52000000e95 R11: 0000000000084087 R12: ffffc90000007498 R13: ffffc90000007485 R14: ffffc90000007450 R15: ffffffff8ed76922 FS: 00007fc121a15700(0000) GS:ffff8880b9c00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000001b31b24000 CR3: 0000000068c3e000 CR4: 0000000000350ef0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600 Call Trace: 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_record_aux_stack+0xe5/0x110 mm/kasan/generic.c:345 irq_work_queue kernel/irq_work.c:74 [inline] irq_work_queue+0x3d/0x80 kernel/irq_work.c:67 __perf_event_overflow+0x239/0x3d0 kernel/events/core.c:9144 perf_swevent_hrtimer+0x37c/0x3f0 kernel/events/core.c:10540 __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:647 RIP: 0010:__raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:161 [inline] RIP: 0010:_raw_spin_unlock_irqrestore+0x38/0x70 kernel/locking/spinlock.c:191 Code: 74 24 10 e8 0a c8 41 f8 48 89 ef e8 a2 40 42 f8 81 e3 00 02 00 00 75 25 9c 58 f6 c4 02 75 2d 48 85 db 74 01 fb bf 01 00 00 00 f3 38 36 f8 65 8b 05 ac 42 e9 76 85 c0 74 0a 5b 5d c3 e8 d0 31 RSP: 0018:ffffc90000007c80 EFLAGS: 00000206 RAX: 0000000000000006 RBX: 0000000000000200 RCX: 1ffffffff2044f12 RDX: 0000000000000000 RSI: 0000000000000104 RDI: 0000000000000001 RBP: ffffffff8bfd4e20 R08: 0000000000000001 R09: ffffffff902248a7 R10: 0000000000000001 R11: 0000000000000000 R12: ffff888031f40500 R13: 0000000000000000 R14: 000000000000000c R15: ffff88807c698d00 kcov_remote_start_common include/linux/kcov.h:48 [inline] ieee80211_rx_list+0x423/0x2680 net/mac80211/rx.c:4802 ieee80211_rx_napi+0xf7/0x3d0 net/mac80211/rx.c:4843 ieee80211_rx include/net/mac80211.h:4528 [inline] ieee80211_tasklet_handler+0xd4/0x130 net/mac80211/main.c:235 tasklet_action_common.constprop.0+0x201/0x2e0 kernel/softirq.c:784 __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:647 RIP: 0010:preempt_count arch/x86/include/asm/preempt.h:27 [inline] RIP: 0010:check_kcov_mode kernel/kcov.c:163 [inline] RIP: 0010:__sanitizer_cov_trace_pc+0x0/0x60 kernel/kcov.c:197 Code: f0 4d 89 03 e9 f2 fc ff ff b9 ff ff ff ff ba 08 00 00 00 4d 8b 03 48 0f bd ca 49 8b 45 00 48 63 c9 e9 64 ff ff ff 0f 1f 40 00 <65> 8b 05 79 1d 8d 7e 89 c1 48 8b 34 24 81 e1 00 01 00 00 65 48 8b RSP: 0018:ffffc9000c0ff5c0 EFLAGS: 00000246 RAX: 0000000000000000 RBX: 0000000000000003 RCX: 0000000000000000 RDX: 0000000000000000 RSI: ffff8880289d1c40 RDI: 0000000000000003 RBP: ffffffff8dc95710 R08: 0000000000000000 R09: 0000000000000000 R10: ffffffff81699425 R11: 0000000000000000 R12: 0000000000000000 R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 smp_call_function_many_cond+0xa3d/0xc20 kernel/smp.c:884 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:852 [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+0xe75/0x1f40 kernel/bpf/syscall.c:2220 __do_sys_bpf+0x1272/0x4f40 kernel/bpf/syscall.c:4410 do_syscall_64+0x3a/0xb0 arch/x86/entry/common.c:47 entry_SYSCALL_64_after_hwframe+0x44/0xae RIP: 0033:0x4665f9 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:00007fc121a15188 EFLAGS: 00000246 ORIG_RAX: 0000000000000141 RAX: ffffffffffffffda RBX: 000000000056bf60 RCX: 00000000004665f9 RDX: 0000000000000048 RSI: 00000000200054c0 RDI: 0000000000000005 RBP: 00000000004bfce1 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 000000000056bf60 R13: 00007ffdbcdd8d4f R14: 00007fc121a15300 R15: 0000000000022000