rcu: INFO: rcu_preempt detected stalls on CPUs/tasks: rcu: 0-....: (1 GPs behind) idle=fb7/1/0x4000000000000002 softirq=71005/71006 fqs=5228 (detected by 1, t=10502 jiffies, g=98777, q=994) Sending NMI from CPU 1 to CPUs 0: NMI backtrace for cpu 0 CPU: 0 PID: 22324 Comm: syz.8.5690 Not tainted syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2026 RIP: 0010:__lock_acquire+0xd8b/0x7d10 kernel/locking/lockdep.c:4982 Code: 00 00 00 e8 37 a6 00 00 85 c0 0f 84 dc 4c 00 00 48 c7 c0 80 af 2d 96 48 c1 e8 03 49 b8 00 00 00 00 00 fc ff df 42 0f b6 04 00 <84> c0 0f 85 34 5c 00 00 83 3d d6 9c d0 14 00 48 8b 4c 24 60 75 3d RSP: 0018:ffffc90000006fc0 EFLAGS: 00000806 RAX: 0000000000000004 RBX: 0000000000000002 RCX: ffffffff815db944 RDX: 0000000000000000 RSI: 0000000000000008 RDI: ffffffff901d40c0 RBP: ffffc90000007210 R08: dffffc0000000000 R09: 1ffffffff203a818 R10: dffffc0000000000 R11: fffffbfff203a819 R12: ffff88802765e4a0 R13: ffff88802765d940 R14: ffffffff8fb5cff8 R15: ffff88802765e480 FS: 00007faa258826c0(0000) GS:ffff8880b9000000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f5d702bfc20 CR3: 000000005a7c3000 CR4: 00000000003506f0 DR0: 0000200000000300 DR1: 0000200000000300 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600 Call Trace: lock_acquire+0x19e/0x400 kernel/locking/lockdep.c:5623 rcu_lock_acquire+0x2a/0x30 include/linux/rcupdate.h:313 rcu_read_lock include/linux/rcupdate.h:740 [inline] __perf_output_begin kernel/events/ring_buffer.c:163 [inline] perf_output_begin_forward+0xa5/0xa40 kernel/events/ring_buffer.c:271 __perf_event_output kernel/events/core.c:7804 [inline] perf_event_output_forward+0x19b/0x2e0 kernel/events/core.c:7822 __perf_event_overflow+0x364/0x530 kernel/events/core.c:9515 perf_tp_event+0x383/0xbf0 kernel/events/core.c:10047 perf_trace_run_bpf_submit+0xf3/0x1c0 kernel/events/core.c:10021 perf_trace_preemptirq_template+0x2aa/0x360 include/trace/events/preemptirq.h:14 trace_irq_enable_rcuidle+0x108/0x180 include/trace/events/preemptirq.h:40 trace_hardirqs_on+0x57/0x80 kernel/trace/trace_preemptirq.c:44 asm_sysvec_irq_work+0x16/0x20 arch/x86/include/asm/idtentry.h:713 RIP: 0010:rcu_read_unlock_special+0x7f/0x4a0 kernel/rcu/tree_plugin.h:674 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 12 f2 9c 7e 41 f7 c6 00 00 f0 00 74 40 <48> c7 44 24 20 0e 36 e0 45 4a c7 04 2b 00 00 00 00 42 c7 44 2b 08 RSP: 0018:ffffc90000007b00 EFLAGS: 00000206 RAX: 90287a4d3676df00 RBX: 1ffff92000000f64 RCX: 90287a4d3676df00 RDX: dffffc0000000000 RSI: ffffffff8a2b2780 RDI: ffffffff8a79f980 RBP: ffffc90000007bd8 R08: ffff8880b903b30b R09: 1ffff11017207661 R10: dffffc0000000000 R11: ffffed1017207662 R12: ffffffff8c322f00 R13: dffffc0000000000 R14: 0000000000000246 R15: 0000000000000001 __rcu_read_unlock+0x78/0xd0 kernel/rcu/tree_plugin.h:422 rcu_read_unlock include/linux/rcupdate.h:772 [inline] ieee80211_iterate_active_interfaces_atomic+0x132/0x140 net/mac80211/util.c:831 mac80211_hwsim_beacon+0x9b/0x180 drivers/net/wireless/mac80211_hwsim.c:1865 __run_hrtimer kernel/time/hrtimer.c:1685 [inline] __hrtimer_run_queues+0x4f2/0xb70 kernel/time/hrtimer.c:1749 hrtimer_run_softirq+0x176/0x240 kernel/time/hrtimer.c:1766 handle_softirqs+0x339/0x830 kernel/softirq.c:576 __do_softirq kernel/softirq.c:610 [inline] invoke_softirq kernel/softirq.c:450 [inline] __irq_exit_rcu+0x13b/0x230 kernel/softirq.c:659 irq_exit_rcu+0x5/0x20 kernel/softirq.c:671 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1108 [inline] sysvec_apic_timer_interrupt+0xa0/0xc0 arch/x86/kernel/apic/apic.c:1108 asm_sysvec_apic_timer_interrupt+0x16/0x20 arch/x86/include/asm/idtentry.h:676 RIP: 0010:unwind_get_return_address+0x2/0x80 arch/x86/kernel/unwind_orc.c:319 Code: ff ff 49 89 fe 48 89 f7 49 89 f7 e8 18 21 89 00 4c 89 f7 4c 89 fe e9 2d ff ff ff e8 68 5d 87 08 0f 1f 84 00 00 00 00 00 41 57 <41> 56 53 48 89 fb 49 be 00 00 00 00 00 fc ff df 48 89 f8 48 c1 e8 RSP: 0018:ffffc90002fbec38 EFLAGS: 00000202 RAX: 0000000080000001 RBX: ffffc90002fbed00 RCX: 0000000080000000 RDX: ffffc90002fbec01 RSI: ffffc90002fbf300 RDI: ffffc90002fbec48 RBP: ffffc90002fbecd0 R08: ffffc90002fbeca7 R09: ffffc90002fbec98 R10: dffffc0000000000 R11: fffff520005f7d95 R12: ffff88802765d940 R13: ffff888016c4fa00 R14: ffffffff81679c90 R15: ffffc90002fbec48 arch_stack_walk+0xf2/0x140 arch/x86/kernel/stacktrace.c:26 stack_trace_save+0xa6/0xf0 kernel/stacktrace.c:122 kasan_save_stack mm/kasan/common.c:38 [inline] kasan_set_track mm/kasan/common.c:46 [inline] set_alloc_info mm/kasan/common.c:434 [inline] __kasan_slab_alloc+0x9c/0xd0 mm/kasan/common.c:467 kasan_slab_alloc include/linux/kasan.h:254 [inline] slab_post_alloc_hook+0x4c/0x380 mm/slab.h:519 slab_alloc_node mm/slub.c:3225 [inline] kmem_cache_alloc_node+0x12d/0x2d0 mm/slub.c:3261 alloc_vmap_area+0x1a2/0x1a10 mm/vmalloc.c:1538 __get_vm_area_node+0x14f/0x2d0 mm/vmalloc.c:2430 __vmalloc_node_range+0xef/0x8b0 mm/vmalloc.c:3027 __vmalloc_node mm/vmalloc.c:3087 [inline] vmalloc+0x75/0x80 mm/vmalloc.c:3120 bpf_prog_calc_tag+0xe1/0x710 kernel/bpf/core.c:281 resolve_pseudo_ldimm64+0xdd/0x1040 kernel/bpf/verifier.c:11831 bpf_check+0x4e00/0xf270 kernel/bpf/verifier.c:14121 bpf_prog_load+0xfec/0x1510 kernel/bpf/syscall.c:2354 __sys_bpf+0x532/0x6f0 kernel/bpf/syscall.c:4657 __do_sys_bpf kernel/bpf/syscall.c:4761 [inline] __se_sys_bpf kernel/bpf/syscall.c:4759 [inline] __x64_sys_bpf+0x78/0x90 kernel/bpf/syscall.c:4759 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x66/0xd0 RIP: 0033:0x7faa27628799 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:00007faa25882028 EFLAGS: 00000246 ORIG_RAX: 0000000000000141 RAX: ffffffffffffffda RBX: 00007faa278a1fa0 RCX: 00007faa27628799 RDX: 0000000000000080 RSI: 0000200000000140 RDI: 0000000000000005 RBP: 00007faa276bec99 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007faa278a2038 R14: 00007faa278a1fa0 R15: 00007ffd8ca05798