rcu: INFO: rcu_preempt detected stalls on CPUs/tasks: (detected by 0, t=10502 jiffies, g=48373, q=139) rcu: All QSes seen, last rcu_preempt kthread activity 10502 (4294992353-4294981851), jiffies_till_next_fqs=1, root ->qsmask 0x0 rcu: rcu_preempt kthread starved for 10502 jiffies! g48373 f0x2 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:28696 pid: 14 ppid: 2 flags:0x00004000 Call Trace: context_switch kernel/sched/core.c:4955 [inline] __schedule+0x940/0x26f0 kernel/sched/core.c:6302 schedule+0xd3/0x270 kernel/sched/core.c:6381 schedule_timeout+0x14a/0x2a0 kernel/time/timer.c:1881 rcu_gp_fqs_loop+0x186/0x810 kernel/rcu/tree.c:1955 rcu_gp_kthread+0x1de/0x320 kernel/rcu/tree.c:2128 kthread+0x3e5/0x4d0 kernel/kthread.c:319 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295 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: 14651 Comm: syz-executor.4 Not tainted 5.14.0-next-20210908-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:asm_sysvec_apic_timer_interrupt+0x0/0x20 arch/x86/include/asm/idtentry.h:637 Code: 00 66 0f 1f 84 00 00 00 00 00 0f 1f 00 6a ff e8 76 03 00 00 48 89 e7 e8 9e 47 f2 ff e9 29 04 00 00 66 0f 1f 84 00 00 00 00 00 <0f> 1f 00 6a ff e8 56 03 00 00 48 89 e7 e8 ee 45 f2 ff e9 09 04 00 RSP: 0018:ffffc90000dc09c8 EFLAGS: 00000006 RAX: dffffc0000000000 RBX: 1ffff920001b8140 RCX: 899ca672f5bee807 RDX: 1ffff110039e313f RSI: 0000000000000102 RDI: 0000000000000000 RBP: 0000000000000000 R08: 0000000000000000 R09: ffffffff8fcfa927 R10: fffffbfff1f9f524 R11: 0000000000000000 R12: 0000000000000002 R13: 0000000000000000 R14: ffffffff8b97fd60 R15: 0000000000000000 FS: 00007f4136b0c700(0000) GS:ffff8880b9d00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000001b2e329000 CR3: 0000000079aa1000 CR4: 00000000001506e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: RIP: 0010:lock_acquire+0x1ef/0x510 kernel/locking/lockdep.c:5593 Code: 91 a6 7e 83 f8 01 0f 85 b4 02 00 00 9c 58 f6 c4 02 0f 85 9f 02 00 00 48 83 7c 24 08 00 74 01 fb 48 b8 00 00 00 00 00 fc ff df <48> 01 c3 48 c7 03 00 00 00 00 48 c7 43 08 00 00 00 00 48 8b 84 24 RSP: 0018:ffffc90000dc09f0 EFLAGS: 00000206 rcu_lock_acquire include/linux/rcupdate.h:267 [inline] rcu_read_lock include/linux/rcupdate.h:687 [inline] ieee80211_iterate_active_interfaces_atomic+0x42/0x180 net/mac80211/util.c:828 mac80211_hwsim_addr_match+0x128/0x180 drivers/net/wireless/mac80211_hwsim.c:1131 mac80211_hwsim_tx_frame_no_nl.isra.0+0xb3d/0x1330 drivers/net/wireless/mac80211_hwsim.c:1570 mac80211_hwsim_tx_frame+0x1ee/0x2a0 drivers/net/wireless/mac80211_hwsim.c:1784 mac80211_hwsim_beacon_tx+0x49b/0x930 drivers/net/wireless/mac80211_hwsim.c:1838 __iterate_interfaces+0x1e5/0x520 net/mac80211/util.c:793 ieee80211_iterate_active_interfaces_atomic+0x70/0x180 net/mac80211/util.c:829 mac80211_hwsim_beacon+0xd5/0x1a0 drivers/net/wireless/mac80211_hwsim.c:1861 __run_hrtimer kernel/time/hrtimer.c:1685 [inline] __hrtimer_run_queues+0x609/0xe50 kernel/time/hrtimer.c:1749 hrtimer_run_softirq+0x17b/0x360 kernel/time/hrtimer.c:1766 __do_softirq+0x29b/0x9c2 kernel/softirq.c:558 invoke_softirq kernel/softirq.c:432 [inline] __irq_exit_rcu+0x123/0x180 kernel/softirq.c:636 irq_exit_rcu+0x5/0x20 kernel/softirq.c:648 sysvec_apic_timer_interrupt+0x93/0xc0 arch/x86/kernel/apic/apic.c:1097 asm_sysvec_apic_timer_interrupt+0x12/0x20 arch/x86/include/asm/idtentry.h:638 RIP: 0010:trylock_clear_pending kernel/locking/qspinlock_paravirt.h:121 [inline] RIP: 0010:pv_wait_head_or_lock kernel/locking/qspinlock_paravirt.h:435 [inline] RIP: 0010:__pv_queued_spin_lock_slowpath+0x3d5/0xb40 kernel/locking/qspinlock.c:508 Code: 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 85 91 05 00 00 <0f> b6 45 00 84 c0 75 db be 02 00 00 00 48 89 ef e8 c6 73 60 00 b8 RSP: 0018:ffffc90002f5f658 EFLAGS: 00000246 RAX: 0000000000000000 RBX: 0000000000000000 RCX: 1ffffffff17538bc RDX: 0000000000000001 RSI: dffffc0000000000 RDI: ffffffff8ba9c5e2 RBP: ffffffff8ba9c5e0 R08: 0000000000000001 R09: ffffffff8ba9c5e3 R10: fffffbfff17538bc R11: 0000000000000000 R12: 0000000000005daa R13: fffffbfff17538bc R14: 0000000000000001 R15: ffff8880b9d32840 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:115 spin_lock include/linux/spinlock.h:368 [inline] preload_this_cpu_lock mm/vmalloc.c:1488 [inline] alloc_vmap_area+0x1dd/0x1e00 mm/vmalloc.c:1530 __get_vm_area_node.constprop.0+0x128/0x380 mm/vmalloc.c:2411 __vmalloc_node_range+0x12a/0x9e0 mm/vmalloc.c:2998 __vmalloc_node mm/vmalloc.c:3057 [inline] __vmalloc+0x69/0x80 mm/vmalloc.c:3071 bpf_prog_alloc_no_stats+0x38/0x360 kernel/bpf/core.c:87 bpf_prog_alloc+0x28/0x1a0 kernel/bpf/core.c:121 bpf_prog_load+0x746/0x21e0 kernel/bpf/syscall.c:2248 __sys_bpf+0x67e/0x5df0 kernel/bpf/syscall.c:4587 __do_sys_bpf kernel/bpf/syscall.c:4691 [inline] __se_sys_bpf kernel/bpf/syscall.c:4689 [inline] __x64_sys_bpf+0x75/0xb0 kernel/bpf/syscall.c:4689 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80 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:00007f4136b0c188 EFLAGS: 00000246 ORIG_RAX: 0000000000000141 RAX: ffffffffffffffda RBX: 000000000056bf80 RCX: 00000000004665f9 RDX: 000000000000006d RSI: 00000000200000c0 RDI: 0000000000000005 RBP: 00000000004bfcc4 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 000000000056bf80 R13: 00007fff67adda6f R14: 00007f4136b0c300 R15: 0000000000022000 ---------------- Code disassembly (best guess), 1 bytes skipped: 0: 66 0f 1f 84 00 00 00 nopw 0x0(%rax,%rax,1) 7: 00 00 9: 0f 1f 00 nopl (%rax) c: 6a ff pushq $0xffffffffffffffff e: e8 76 03 00 00 callq 0x389 13: 48 89 e7 mov %rsp,%rdi 16: e8 9e 47 f2 ff callq 0xfff247b9 1b: e9 29 04 00 00 jmpq 0x449 20: 66 0f 1f 84 00 00 00 nopw 0x0(%rax,%rax,1) 27: 00 00 * 29: 0f 1f 00 nopl (%rax) <-- trapping instruction 2c: 6a ff pushq $0xffffffffffffffff 2e: e8 56 03 00 00 callq 0x389 33: 48 89 e7 mov %rsp,%rdi 36: e8 ee 45 f2 ff callq 0xfff24629 3b: e9 .byte 0xe9 3c: 09 04 00 or %eax,(%rax,%rax,1)