------------[ cut here ]------------
WARNING: CPU: 1 PID: 1092 at net/mac80211/tx.c:4876 __ieee80211_beacon_update_cntdwn net/mac80211/tx.c:4876 [inline]
WARNING: CPU: 1 PID: 1092 at net/mac80211/tx.c:4876 __ieee80211_beacon_get+0x178a/0x1ff0 net/mac80211/tx.c:5100
Modules linked in:
CPU: 1 PID: 1092 Comm: kworker/1:1H Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/24/2026
Workqueue: events_highpri snd_vmidi_output_work
RIP: 0010:__ieee80211_beacon_update_cntdwn net/mac80211/tx.c:4876 [inline]
RIP: 0010:__ieee80211_beacon_get+0x178a/0x1ff0 net/mac80211/tx.c:5100
Code: 26 f8 0f 0b 4f 89 64 2f 04 4f 89 64 2f 0c 43 c6 44 2f 14 f8 e9 19 fe ff ff e8 82 68 26 f8 0f 0b e9 16 ef ff ff e8 76 68 26 f8 <0f> 0b e9 7c f2 ff ff e8 3a 80 6d 00 89 d9 80 e1 07 80 c1 03 38 c1
RSP: 0018:ffffc90000dd08c0 EFLAGS: 00010246
RAX: ffffffff8952943a RBX: ffff88802a5db800 RCX: ffff888021215940
RDX: 0000000000000100 RSI: 0000000000000000 RDI: 0000000000000000
RBP: ffffc90000dd0af8 R08: ffff888021215940 R09: 0000000000000003
R10: 0000000000000007 R11: 0000000000000100 R12: f8f8f8f8f8f8f8f8
R13: dffffc0000000000 R14: 0000000000000000 R15: 1ffff920001ba128
FS:  0000000000000000(0000) GS:ffff8880b9100000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000200000009000 CR3: 0000000017ad9000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <IRQ>
 ieee80211_beacon_get_tim+0x48/0x840 net/mac80211/tx.c:5219
 ieee80211_beacon_get include/net/mac80211.h:4983 [inline]
 mac80211_hwsim_beacon_tx+0x104/0x900 drivers/net/wireless/mac80211_hwsim.c:1812
 __iterate_interfaces+0x225/0x4c0 net/mac80211/util.c:793
 ieee80211_iterate_active_interfaces_atomic+0xb3/0x140 net/mac80211/util.c:829
 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
 __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
 </IRQ>
 <TASK>
 asm_sysvec_apic_timer_interrupt+0x16/0x20 arch/x86/include/asm/idtentry.h:676
RIP: 0010:up_read+0x1/0x20 kernel/locking/rwsem.c:1592
Code: c1 88 41 8b 8d 80 e1 07 80 c1 03 38 c1 0f 8c 96 fe ff ff 48 c7 c7 88 41 8b 8d e8 aa f6 61 00 e9 85 fe ff ff 0f 1f 44 00 00 53 <48> 89 fb 48 83 c7 70 48 8b 74 24 08 e8 4e 32 01 00 48 89 df 5b eb
RSP: 0018:ffffc900047bfa48 EFLAGS: 00000283
RAX: ffffffff87b629aa RBX: ffff88802b732080 RCX: ffff888021215940
RDX: 0000000000000000 RSI: ffffc900047bfadc RDI: ffff88802b732080
RBP: ffff88807d877f28 R08: ffff88807d877f43 R09: 1ffff1100fb0efe8
R10: dffffc0000000000 R11: ffffed100fb0efe9 R12: dffffc0000000000
R13: 0000000000000000 R14: 0000000000000001 R15: 0000000000000000
 deliver_to_subscribers sound/core/seq/seq_clientmgr.c:735 [inline]
 snd_seq_deliver_event+0x6d6/0x8c0 sound/core/seq/seq_clientmgr.c:854
 snd_seq_kernel_client_dispatch+0x1fc/0x2f0 sound/core/seq/seq_clientmgr.c:2407
 snd_vmidi_output_work+0x239/0x3e0 sound/core/seq/seq_virmidi.c:157
 process_one_work+0x867/0xff0 kernel/workqueue.c:2310
 worker_thread+0xad7/0x12a0 kernel/workqueue.c:2457
 kthread+0x42e/0x520 kernel/kthread.c:334
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:287
 </TASK>
----------------
Code disassembly (best guess), 5 bytes skipped:
   0:	80 e1 07             	and    $0x7,%cl
   3:	80 c1 03             	add    $0x3,%cl
   6:	38 c1                	cmp    %al,%cl
   8:	0f 8c 96 fe ff ff    	jl     0xfffffea4
   e:	48 c7 c7 88 41 8b 8d 	mov    $0xffffffff8d8b4188,%rdi
  15:	e8 aa f6 61 00       	call   0x61f6c4
  1a:	e9 85 fe ff ff       	jmp    0xfffffea4
  1f:	0f 1f 44 00 00       	nopl   0x0(%rax,%rax,1)
  24:	53                   	push   %rbx
* 25:	48 89 fb             	mov    %rdi,%rbx <-- trapping instruction
  28:	48 83 c7 70          	add    $0x70,%rdi
  2c:	48 8b 74 24 08       	mov    0x8(%rsp),%rsi
  31:	e8 4e 32 01 00       	call   0x13284
  36:	48 89 df             	mov    %rbx,%rdi
  39:	5b                   	pop    %rbx
  3a:	eb                   	.byte 0xeb