------------[ cut here ]------------ WARNING: CPU: 1 PID: 1043 at net/mac80211/tx.c:4934 __ieee80211_beacon_update_cntdwn net/mac80211/tx.c:4934 [inline] WARNING: CPU: 1 PID: 1043 at net/mac80211/tx.c:4934 __ieee80211_beacon_get+0x1952/0x1f50 net/mac80211/tx.c:5255 Modules linked in: CPU: 1 PID: 1043 Comm: kworker/1:1H Not tainted 6.1.141-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025 Workqueue: events_highpri snd_vmidi_output_work RIP: 0010:__ieee80211_beacon_update_cntdwn net/mac80211/tx.c:4934 [inline] RIP: 0010:__ieee80211_beacon_get+0x1952/0x1f50 net/mac80211/tx.c:5255 Code: ff ff ff e8 a0 f6 eb f7 0f 0b 48 8b 7c 24 20 e8 b4 ae 7f fe e9 dd e9 ff ff e8 8a f6 eb f7 0f 0b e9 f1 ee ff ff e8 7e f6 eb f7 <0f> 0b e9 61 f2 ff ff e8 72 f6 eb f7 48 c7 c7 f0 99 d9 8d 4c 89 f6 RSP: 0018:ffffc900001e08a0 EFLAGS: 00010246 RAX: ffffffff8994dff2 RBX: 0000000000000000 RCX: ffff8880263fbb80 RDX: 0000000000000100 RSI: 0000000000000000 RDI: 0000000000000000 RBP: ffffc900001e0aa8 R08: ffff8880263fbb80 R09: 0000000000000003 R10: 0000000000000007 R11: 0000000000000100 R12: 1ffff9200003c12c R13: dffffc0000000000 R14: ffff88801a6ea258 R15: ffff88807317fe00 FS: 0000000000000000(0000) GS:ffff8880b8f00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000200000003000 CR3: 000000002921e000 CR4: 00000000003506e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: ieee80211_beacon_get_tim+0x5b/0x4d0 net/mac80211/tx.c:5342 ieee80211_beacon_get include/net/mac80211.h:5262 [inline] mac80211_hwsim_beacon_tx+0x21c/0xae0 drivers/net/wireless/mac80211_hwsim.c:2086 __iterate_interfaces+0x243/0x500 net/mac80211/util.c:788 ieee80211_iterate_active_interfaces_atomic+0xd7/0x170 net/mac80211/util.c:824 mac80211_hwsim_beacon+0xb7/0x1b0 drivers/net/wireless/mac80211_hwsim.c:2142 __run_hrtimer kernel/time/hrtimer.c:1752 [inline] __hrtimer_run_queues+0x554/0xd60 kernel/time/hrtimer.c:1816 hrtimer_run_softirq+0x183/0x2a0 kernel/time/hrtimer.c:1833 handle_softirqs+0x2a1/0x920 kernel/softirq.c:596 __do_softirq kernel/softirq.c:630 [inline] invoke_softirq kernel/softirq.c:470 [inline] __irq_exit_rcu+0x12f/0x220 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:__raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:152 [inline] RIP: 0010:_raw_spin_unlock_irqrestore+0xa5/0x100 kernel/locking/spinlock.c:194 Code: 74 05 e8 ce 97 6d f7 48 c7 44 24 20 00 00 00 00 9c 8f 44 24 20 f6 44 24 21 02 75 4b f7 c3 00 02 00 00 74 01 fb bf 01 00 00 00 c6 13 3e f7 65 8b 05 97 d4 e8 75 85 c0 74 3c 48 c7 04 24 0e 36 RSP: 0018:ffffc90004affa80 EFLAGS: 00000206 RAX: d246f815612d6000 RBX: 0000000000000a06 RCX: d246f815612d6000 RDX: dffffc0000000000 RSI: ffffffff8a6bffe0 RDI: 0000000000000001 RBP: ffffc90004affb18 R08: dffffc0000000000 R09: fffffbfff2117068 R10: fffffbfff2117068 R11: 1ffffffff2117067 R12: dffffc0000000000 R13: ffff88814ca0af18 R14: ffff88814ca0af30 R15: 1ffff9200095ff50 spin_unlock_irqrestore include/linux/spinlock.h:406 [inline] snd_rawmidi_transmit+0x98/0xc0 sound/core/rawmidi.c:1478 snd_vmidi_output_work+0x1a0/0x400 sound/core/seq/seq_virmidi.c:151 process_one_work+0x898/0x1160 kernel/workqueue.c:2292 worker_thread+0xaa2/0x1250 kernel/workqueue.c:2439 kthread+0x29d/0x330 kernel/kthread.c:376 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295 ---------------- Code disassembly (best guess): 0: 74 05 je 0x7 2: e8 ce 97 6d f7 call 0xf76d97d5 7: 48 c7 44 24 20 00 00 movq $0x0,0x20(%rsp) e: 00 00 10: 9c pushf 11: 8f 44 24 20 pop 0x20(%rsp) 15: f6 44 24 21 02 testb $0x2,0x21(%rsp) 1a: 75 4b jne 0x67 1c: f7 c3 00 02 00 00 test $0x200,%ebx 22: 74 01 je 0x25 24: fb sti 25: bf 01 00 00 00 mov $0x1,%edi * 2a: e8 c6 13 3e f7 call 0xf73e13f5 <-- trapping instruction 2f: 65 8b 05 97 d4 e8 75 mov %gs:0x75e8d497(%rip),%eax # 0x75e8d4cd 36: 85 c0 test %eax,%eax 38: 74 3c je 0x76 3a: 48 rex.W 3b: c7 .byte 0xc7 3c: 04 24 add $0x24,%al 3e: 0e (bad) 3f: 36 ss