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=519817, q=258) rcu: All QSes seen, last rcu_preempt kthread activity 10483 (4295219774-4295209291), jiffies_till_next_fqs=1, root ->qsmask 0x0 rcu: rcu_preempt kthread starved for 10483 jiffies! g519817 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:28672 pid: 14 ppid: 2 flags:0x00004000 Call Trace: context_switch kernel/sched/core.c:4683 [inline] __schedule+0x93a/0x26f0 kernel/sched/core.c:5940 schedule+0xd3/0x270 kernel/sched/core.c:6019 schedule_timeout+0x14a/0x2a0 kernel/time/timer.c:1878 rcu_gp_fqs_loop kernel/rcu/tree.c:1996 [inline] rcu_gp_kthread+0xd34/0x1980 kernel/rcu/tree.c:2169 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: 5949 Comm: syz-executor.0 Tainted: G W 5.14.0-rc1-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:pv_wait_node kernel/locking/qspinlock_paravirt.h:302 [inline] RIP: 0010:__pv_queued_spin_lock_slowpath+0x5cd/0xb40 kernel/locking/qspinlock.c:473 Code: 24 4c 89 e9 83 e1 07 38 ca 7f 08 84 d2 0f 85 ed 03 00 00 0f b6 53 14 84 d2 0f 85 9e 00 00 00 f3 90 83 e8 01 0f 84 93 00 00 00 <0f> b6 16 84 d2 74 09 80 fa 03 0f 8e 96 03 00 00 41 8b 57 08 85 d2 RSP: 0018:ffffc90000dc0a30 EFLAGS: 00000206 RAX: 0000000000001188 RBX: ffff8880b9c527c0 RCX: 0000000000000004 RDX: 0000000000000000 RSI: ffffed10173aa4f9 RDI: ffff8880b9d527d4 RBP: ffff8880b9d527d4 R08: 0000000000000001 R09: ffff8880b9d527d4 R10: ffffed10173aa4fa R11: 0000000000000080 R12: ffffed101738a4fa R13: ffff8880b9c527d4 R14: dffffc0000000000 R15: ffff8880b9d527c0 FS: 00007face6174700(0000) GS:ffff8880b9d00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000000000000 CR3: 000000005d247000 CR4: 00000000001506e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000600 Call Trace: 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] mac80211_hwsim_tx_frame_no_nl.isra.0+0x68f/0x1330 drivers/net/wireless/mac80211_hwsim.c:1516 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:1537 [inline] __hrtimer_run_queues+0x609/0xe50 kernel/time/hrtimer.c:1601 hrtimer_run_softirq+0x17b/0x360 kernel/time/hrtimer.c:1618 __do_softirq+0x29b/0x9c2 kernel/softirq.c:558 invoke_softirq kernel/softirq.c:432 [inline] __irq_exit_rcu+0x16e/0x1c0 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:1100 asm_sysvec_apic_timer_interrupt+0x12/0x20 arch/x86/include/asm/idtentry.h:638 RIP: 0010:unwind_next_frame+0xd41/0x1ce0 arch/x86/kernel/unwind_orc.c:542 Code: 49 8d 7e 58 49 c7 46 50 00 00 00 00 48 b8 00 00 00 00 00 fc ff df 48 89 fa 48 c1 ea 03 80 3c 02 00 0f 85 74 0e 00 00 4c 89 ea <49> c7 46 58 00 00 00 00 48 b8 00 00 00 00 00 fc ff df 48 c1 ea 03 RSP: 0018:ffffc900016df260 EFLAGS: 00000246 RAX: dffffc0000000000 RBX: 1ffff920002dbe54 RCX: ffffffff8ded4f09 RDX: ffffc900016df36d RSI: ffffc900016dfb58 RDI: ffffc900016df390 RBP: 0000000000000001 R08: ffffffff8ded4f04 R09: 0000000000000001 R10: fffff520002dbe72 R11: 0000000000086088 R12: ffffc900016dfb60 R13: ffffc900016df36d R14: ffffc900016df338 R15: ffffffff8ded4f08 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:434 [inline] ____kasan_kmalloc mm/kasan/common.c:513 [inline] ____kasan_kmalloc mm/kasan/common.c:472 [inline] __kasan_kmalloc+0x9b/0xd0 mm/kasan/common.c:522 kmalloc_node include/linux/slab.h:614 [inline] __vmalloc_area_node mm/vmalloc.c:2849 [inline] __vmalloc_node_range+0x554/0x960 mm/vmalloc.c:2966 __vmalloc_node mm/vmalloc.c:3015 [inline] vmalloc+0x67/0x80 mm/vmalloc.c:3048 bpf_prog_calc_tag+0xc0/0x740 kernel/bpf/core.c:276 resolve_pseudo_ldimm64 kernel/bpf/verifier.c:11504 [inline] bpf_check+0x1c7e/0xbcb0 kernel/bpf/verifier.c:13806 bpf_prog_load+0xe57/0x21f0 kernel/bpf/syscall.c:2307 __sys_bpf+0x65a/0x5410 kernel/bpf/syscall.c:4502 __do_sys_bpf kernel/bpf/syscall.c:4606 [inline] __se_sys_bpf kernel/bpf/syscall.c:4604 [inline] __x64_sys_bpf+0x75/0xb0 kernel/bpf/syscall.c:4604 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: 0033:0x4665d9 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:00007face6174188 EFLAGS: 00000246 ORIG_RAX: 0000000000000141 RAX: ffffffffffffffda RBX: 000000000056bf80 RCX: 00000000004665d9 RDX: 0000000000000070 RSI: 0000000020000440 RDI: 0000000000000005 RBP: 00000000004bfcb9 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 000000000056bf80 R13: 00007fff395f2bcf R14: 00007face6174300 R15: 0000000000022000