rcu: INFO: rcu_preempt detected stalls on CPUs/tasks: rcu: 0-....: (1 GPs behind) idle=2bd/1/0x4000000000000002 softirq=13182/13183 fqs=2100 (detected by 1, t=10506 jiffies, g=17121, q=308) Sending NMI from CPU 1 to CPUs 0: NMI backtrace for cpu 0 CPU: 0 PID: 14 Comm: ksoftirqd/0 Not tainted syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 11/06/2026 RIP: 0010:lockdep_recursion_inc kernel/locking/lockdep.c:431 [inline] RIP: 0010:lock_acquire+0x165/0x400 kernel/locking/lockdep.c:5736 Code: 00 00 00 00 00 00 00 9c 8f 84 24 a0 00 00 00 4c 8b b4 24 a0 00 00 00 43 c6 44 3c 08 f8 fa 48 c7 c7 60 39 2b 8a e8 7b a7 6c 08 <65> ff 05 c4 83 a5 7e 45 31 c9 41 f7 c6 00 02 00 00 41 0f 94 c1 4c RSP: 0018:ffffc90000d370a0 EFLAGS: 00000086 RAX: 0000000000000000 RBX: 0000000000000000 RCX: 64a80abfc6376700 RDX: 0000000000000000 RSI: ffffffff8a2b3960 RDI: ffffffff8a7a5100 RBP: ffffc90000d371c0 R08: ffffffff8e6d322f R09: 1ffffffff1cda645 R10: dffffc0000000000 R11: fffffbfff1cda646 R12: 1ffff920001a6e20 R13: ffffffff8d11efa0 R14: 0000000000000046 R15: dffffc0000000000 FS: 0000000000000000(0000) GS:ffff8880b8e00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000000110c32022e CR3: 0000000050f21000 CR4: 00000000003506f0 DR0: 0000200000000300 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600 Call Trace: 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+0xa5/0xa30 kernel/events/ring_buffer.c:271 __perf_event_output kernel/events/core.c:7816 [inline] perf_event_output_forward+0x19b/0x2e0 kernel/events/core.c:7834 __perf_event_overflow+0x35f/0x550 kernel/events/core.c:9527 perf_swevent_overflow kernel/events/core.c:9603 [inline] perf_swevent_event+0x4b8/0x540 kernel/events/core.c:9641 perf_tp_event+0x324/0xbe0 kernel/events/core.c:10059 perf_trace_run_bpf_submit+0xf3/0x1c0 kernel/events/core.c:10033 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 d2 f6 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:ffffc90000d379a0 EFLAGS: 00000206 RAX: 64a80abfc6376700 RBX: 1ffff920001a6f38 RCX: 64a80abfc6376700 RDX: dffffc0000000000 RSI: ffffffff8a2b2b60 RDI: ffffffff8a7a5100 RBP: ffffc90000d37a78 R08: ffff8880b8e3b30b R09: 1ffff110171c7661 R10: dffffc0000000000 R11: ffffed10171c7662 R12: ffffffff8d123400 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+0x4ea/0xb60 kernel/time/hrtimer.c:1749 hrtimer_run_softirq+0x176/0x240 kernel/time/hrtimer.c:1766 handle_softirqs+0x336/0x830 kernel/softirq.c:576 run_ksoftirqd+0xa4/0x100 kernel/softirq.c:943 smpboot_thread_fn+0x520/0x990 kernel/smpboot.c:164 kthread+0x42e/0x520 kernel/kthread.c:334 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:287