rcu: INFO: rcu_preempt detected expedited stalls on CPUs/tasks: { 0-.... } 2665 jiffies s: 128969 root: 0x1/. rcu: blocking rcu_node structures (internal RCU debug): Sending NMI from CPU 1 to CPUs 0: NMI backtrace for cpu 0 CPU: 0 PID: 21796 Comm: syz.3.4681 Not tainted syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/18/2026 RIP: 0010:check_preemption_disabled+0x42/0x110 lib/smp_processor_id.c:55 Code: 65 8b 05 01 6f d3 75 65 8b 0d a2 c4 d3 75 f7 c1 ff ff ff 7f 74 1f 65 48 8b 0c 25 28 00 00 00 48 3b 4c 24 08 0f 85 c4 00 00 00 <48> 83 c4 10 5b 41 5e 41 5f 5d c3 48 c7 04 24 00 00 00 00 9c 8f 04 RSP: 0018:ffffc90000007738 EFLAGS: 00000046 RAX: 0000000000000000 RBX: 0000000000000000 RCX: 936df1725b7dc300 RDX: ffff888024218000 RSI: ffffffff8adf1b40 RDI: ffffffff8adf1b00 RBP: ffffc90000007898 R08: dffffc0000000000 R09: 1ffffffff215fa48 R10: dffffc0000000000 R11: fffffbfff215fa49 R12: ffffffff8cb804a0 R13: 1ffff92000000f00 R14: ffff888055fb9680 R15: 0000000000000000 FS: 00007f8bbc6be6c0(0000) GS:ffff8880b8e00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000000000000 CR3: 000000007c8ad000 CR4: 00000000003506f0 DR0: 0000200000000300 DR1: 0000200000000300 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600 Call Trace: rcu_dynticks_curr_cpu_in_eqs include/linux/context_tracking.h:122 [inline] rcu_is_watching+0x11/0xa0 kernel/rcu/tree.c:721 rcu_read_lock_held_common kernel/rcu/update.c:108 [inline] rcu_read_lock_held+0x11/0x40 kernel/rcu/update.c:309 trace_call_bpf+0x19e/0x6b0 kernel/trace/bpf_trace.c:135 perf_trace_run_bpf_submit+0x79/0x1c0 kernel/events/core.c:10027 perf_trace_preemptirq_template+0x268/0x320 include/trace/events/preemptirq.h:14 trace_irq_enable_rcuidle+0xd3/0x140 include/trace/events/preemptirq.h:40 trace_hardirqs_on+0x24/0x40 kernel/trace/trace_preemptirq.c:44 asm_sysvec_irq_work+0x16/0x20 arch/x86/include/asm/idtentry.h:728 RIP: 0010:rcu_read_unlock_special+0x7f/0x510 kernel/rcu/tree_plugin.h:685 Code: eb 03 48 b8 f1 f1 f1 f1 f8 f2 f2 f2 4a 89 04 2b 42 c7 44 2b 08 f8 f3 f3 f3 65 44 8b 35 82 22 95 7e 41 f7 c6 00 00 f0 00 74 40 <48> c7 44 24 40 0e 36 e0 45 4a c7 04 2b 00 00 00 00 42 c7 44 2b 08 RSP: 0018:ffffc90000007ac0 EFLAGS: 00000206 RAX: 936df1725b7dc300 RBX: 1ffff92000000f60 RCX: 936df1725b7dc300 RDX: dffffc0000000000 RSI: ffffffff8a8c19a0 RDI: ffffffff8adf1b60 RBP: ffffc90000007bb0 R08: ffff8880b8e3580b R09: 1ffff110171c6b01 R10: dffffc0000000000 R11: ffffed10171c6b02 R12: 0000000000000246 R13: dffffc0000000000 R14: ffff8880b8e3b900 R15: 0000000000000001 __rcu_read_unlock+0x78/0xd0 kernel/rcu/tree_plugin.h:426 rcu_read_unlock include/linux/rcupdate.h:823 [inline] ieee80211_iterate_active_interfaces_atomic+0x156/0x170 net/mac80211/util.c:826 mac80211_hwsim_beacon+0xb7/0x1b0 drivers/net/wireless/mac80211_hwsim.c:2147 __run_hrtimer kernel/time/hrtimer.c:1747 [inline] __hrtimer_run_queues+0x54a/0xd50 kernel/time/hrtimer.c:1811 hrtimer_run_softirq+0x183/0x2a0 kernel/time/hrtimer.c:1828 handle_softirqs+0x2a1/0x930 kernel/softirq.c:596 __do_softirq kernel/softirq.c:630 [inline] invoke_softirq kernel/softirq.c:470 [inline] __irq_exit_rcu+0x13b/0x230 kernel/softirq.c:679 irq_exit_rcu+0x5/0x20 kernel/softirq.c:691 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1118 [inline] sysvec_apic_timer_interrupt+0xa0/0xc0 arch/x86/kernel/apic/apic.c:1118 asm_sysvec_apic_timer_interrupt+0x16/0x20 arch/x86/include/asm/idtentry.h:691 RIP: 0010:finish_task_switch+0x26a/0x8f0 kernel/sched/core.c:5124 Code: 0f 84 3b 01 00 00 48 85 db 0f 85 5a 01 00 00 0f 1f 44 00 00 4c 8b 75 d0 4c 89 e7 e8 a0 eb de 08 e8 5b 2d 2f 00 fb 4c 8b 65 c0 <49> 8d bc 24 f8 15 00 00 48 89 f8 48 c1 e8 03 42 0f b6 04 28 84 c0 RSP: 0018:ffffc90005fbf718 EFLAGS: 00000286 RAX: 936df1725b7dc300 RBX: 0000000000000000 RCX: 936df1725b7dc300 RDX: dffffc0000000000 RSI: ffffffff8a8c19a0 RDI: ffffffff8adf1b60 RBP: ffffc90005fbf770 R08: ffff8880b8e3580b R09: 1ffff110171c6b01 R10: dffffc0000000000 R11: ffffed10171c6b02 R12: ffff888024218000 R13: dffffc0000000000 R14: ffff88802683bb80 R15: ffff8880b8e3b5d0 context_switch kernel/sched/core.c:5248 [inline] __schedule+0x11d9/0x40e0 kernel/sched/core.c:6562 preempt_schedule_irq+0xbb/0x160 kernel/sched/core.c:6874 irqentry_exit+0x63/0x70 kernel/entry/common.c:439 asm_sysvec_apic_timer_interrupt+0x16/0x20 arch/x86/include/asm/idtentry.h:691 RIP: 0010:next_tid mm/slub.c:2354 [inline] RIP: 0010:slab_alloc_node mm/slub.c:3343 [inline] RIP: 0010:__kmem_cache_alloc_node+0xd5/0x260 mm/slub.c:3398 Code: 00 49 8b 3e 40 f6 c7 0f 0f 85 a1 01 00 00 48 8d 47 08 48 89 f9 48 83 c9 08 48 39 c1 0f 85 8f 01 00 00 41 8b 46 28 49 8b 1c 07 <48> 8d 4a 08 4c 89 f8 65 48 0f c7 0f 0f 94 c0 a8 01 0f 84 78 ff ff RSP: 0018:ffffc90005fbfa98 EFLAGS: 00000246 RAX: 0000000000000400 RBX: 0000000000000000 RCX: 000000000003ec28 RDX: 0000000000026c00 RSI: ffffffff8a8c19a0 RDI: 000000000003ec20 RBP: 0000000000500dc0 R08: ffff8880b8e3580b R09: 1ffff110171c6b01 R10: dffffc0000000000 R11: ffffed10171c6b02 R12: ffffffff818eef62 R13: 00000000ffffffff R14: ffff88801744c140 R15: ffff8880774da000 kmalloc_trace+0x26/0xe0 mm/slab_common.c:1026 kmalloc include/linux/slab.h:563 [inline] kzalloc include/linux/slab.h:699 [inline] bpf_prog_alloc_no_stats+0xb2/0x3a0 kernel/bpf/core.c:96 bpf_prog_alloc+0x1c/0x1b0 kernel/bpf/core.c:130 bpf_prog_load+0x7c9/0x1560 kernel/bpf/syscall.c:2597 __sys_bpf+0x5b8/0x780 kernel/bpf/syscall.c:5031 __do_sys_bpf kernel/bpf/syscall.c:5135 [inline] __se_sys_bpf kernel/bpf/syscall.c:5133 [inline] __x64_sys_bpf+0x78/0x90 kernel/bpf/syscall.c:5133 do_syscall_x64 arch/x86/entry/common.c:46 [inline] do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:76 entry_SYSCALL_64_after_hwframe+0x68/0xd2 RIP: 0033:0x7f8bbb79ce59 Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 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 e8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f8bbc6be028 EFLAGS: 00000246 ORIG_RAX: 0000000000000141 RAX: ffffffffffffffda RBX: 00007f8bbba16090 RCX: 00007f8bbb79ce59 RDX: 0000000000000090 RSI: 0000200000000780 RDI: 0000000000000005 RBP: 00007f8bbb832d6f R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007f8bbba16128 R14: 00007f8bbba16090 R15: 00007fffa2d8f108