rcu: INFO: rcu_preempt detected stalls on CPUs/tasks: rcu: Tasks blocked on level-0 rcu_node (CPUs 0-1): (detected by 0, t=10502 jiffies, g=424393, q=24) rcu: All QSes seen, last rcu_preempt kthread activity 10498 (4295220578-4295210080), jiffies_till_next_fqs=1, root ->qsmask 0x0 rcu: rcu_preempt kthread starved for 10498 jiffies! g424393 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x0 ->cpu=1 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 0 to CPUs 1: NMI backtrace for cpu 1 CPU: 1 PID: 19290 Comm: syz-executor.5 Not tainted 5.12.0-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:__kasan_check_read+0x4/0x10 mm/kasan/shadow.c:31 Code: 1b 07 48 85 db 0f 85 90 13 1d 07 48 83 c4 60 5b 5d 41 5c 41 5d c3 c3 e9 90 14 1d 07 cc cc cc cc cc cc cc cc cc cc 48 8b 0c 24 <89> f6 31 d2 e9 03 f9 ff ff 0f 1f 00 48 8b 0c 24 89 f6 ba 01 00 00 RSP: 0018:ffffc90000dc02f8 EFLAGS: 00000046 RAX: 0000000000000000 RBX: 1ffff920001b8062 RCX: ffffffff815a7148 RDX: 0000000000000001 RSI: 0000000000000008 RDI: ffffffff8dc95d50 RBP: 0000000000000001 R08: 0000000000000001 R09: 0000000000000000 R10: ffffffff8165364c R11: 0000000000000000 R12: 0000000000000002 R13: ffffffff8bf985c8 R14: 0000000000000000 R15: 0000000000000000 FS: 00007fb0b2195700(0000) GS:ffff8880b9d00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000000970004 CR3: 0000000088283000 CR4: 00000000001506e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: instrument_atomic_read include/linux/instrumented.h:71 [inline] test_bit include/asm-generic/bitops/instrumented-non-atomic.h:134 [inline] cpumask_test_cpu include/linux/cpumask.h:344 [inline] cpu_online include/linux/cpumask.h:895 [inline] trace_lock_acquire include/trace/events/lock.h:13 [inline] lock_acquire+0xb8/0x740 kernel/locking/lockdep.c:5483 seqcount_lockdep_reader_access include/linux/seqlock.h:103 [inline] ktime_get+0x7c/0x470 kernel/time/timekeeping.c:827 hrtimer_forward_now include/linux/hrtimer.h:510 [inline] perf_swevent_hrtimer+0x246/0x3f0 kernel/events/core.c:10545 __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:__local_bh_enable_ip+0xa8/0x120 kernel/softirq.c:391 Code: 1d 3d 1a bc 7e 65 8b 05 36 1a bc 7e a9 00 ff ff 00 74 45 bf 01 00 00 00 e8 c5 14 09 00 e8 80 fd 34 00 fb 65 8b 05 18 1a bc 7e <85> c0 74 58 5b 5d c3 65 8b 05 66 21 bc 7e 85 c0 75 a2 0f 0b eb 9e RSP: 0018:ffffc90000dc08d8 EFLAGS: 00000202 RAX: 0000000000000101 RBX: 00000000fffffe00 RCX: 1ffffffff20450fa RDX: 0000000000000000 RSI: 0000000000000101 RDI: 0000000000000000 RBP: ffffffff8871ccb9 R08: 0000000000000001 R09: ffffffff902258a7 R10: 0000000000000001 R11: 0000000000000003 R12: dffffc0000000000 R13: ffffc90000dc0bc0 R14: ffff888088cc6450 R15: 0000000000000003 spin_unlock_bh include/linux/spinlock.h:399 [inline] ieee80211_rx_handlers+0x10f9/0xb2e0 net/mac80211/rx.c:3886 ieee80211_invoke_rx_handlers net/mac80211/rx.c:3908 [inline] ieee80211_prepare_and_rx_handle+0x22ad/0x5070 net/mac80211/rx.c:4622 __ieee80211_rx_handle_packet net/mac80211/rx.c:4720 [inline] ieee80211_rx_list+0x930/0x2680 net/mac80211/rx.c:4904 ieee80211_rx_napi+0xf7/0x3d0 net/mac80211/rx.c:4927 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:632 RIP: 0010:get_subtree_max_size mm/vmalloc.c:746 [inline] RIP: 0010:find_vmap_lowest_match mm/vmalloc.c:1159 [inline] RIP: 0010:__alloc_vmap_area mm/vmalloc.c:1383 [inline] RIP: 0010:alloc_vmap_area+0x220/0x1e10 mm/vmalloc.c:1492 Code: 6d 10 45 31 f6 4d 85 ed 74 2a e8 2b 14 c6 ff 49 83 fd 10 74 1f e8 20 14 c6 ff 49 8d 7d 28 48 89 f8 48 c1 e8 03 42 80 3c 20 00 <0f> 85 03 18 00 00 4d 8b 75 28 e8 01 14 c6 ff 48 8d 45 f0 48 89 44 RSP: 0018:ffffc9000202f6e8 EFLAGS: 00000246 RAX: 1ffff11004e95267 RBX: ffff888027cc5910 RCX: ffffc9001415d000 RDX: 0000000000040000 RSI: ffffffff81aeb250 RDI: ffff8880274a9338 RBP: ffff888027cc5910 R08: 0000000000002000 R09: 0000000000000003 R10: ffffffff81aeb463 R11: 0000000000000000 R12: dffffc0000000000 R13: ffff8880274a9310 R14: 0000000000000000 R15: ffffc90000000000 __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] vzalloc+0x67/0x80 mm/vmalloc.c:3016 bpf_check+0x197/0xc8d0 kernel/bpf/verifier.c:13317 bpf_prog_load+0xe47/0x1f40 kernel/bpf/syscall.c:2217 __do_sys_bpf+0x1272/0x4f40 kernel/bpf/syscall.c:4411 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:00007fb0b2195188 EFLAGS: 00000246 ORIG_RAX: 0000000000000141 RAX: ffffffffffffffda RBX: 000000000056bf60 RCX: 00000000004665d9 RDX: 0000000000000048 RSI: 0000000020000200 RDI: 0000000000000005 RBP: 00000000004bfcb9 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 000000000056bf60 R13: 00007fff0a6dffcf R14: 00007fb0b2195300 R15: 0000000000022000