------------[ cut here ]------------
WARNING: CPU: 0 PID: 9404 at net/mac80211/tx.c:5031 __ieee80211_beacon_update_cntdwn net/mac80211/tx.c:5031 [inline]
WARNING: CPU: 0 PID: 9404 at net/mac80211/tx.c:5031 __ieee80211_beacon_get+0x1233/0x1600 net/mac80211/tx.c:5442
Modules linked in:
CPU: 0 PID: 9404 Comm: syz.1.438 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/12/2025
RIP: 0010:__ieee80211_beacon_update_cntdwn net/mac80211/tx.c:5031 [inline]
RIP: 0010:__ieee80211_beacon_get+0x1233/0x1600 net/mac80211/tx.c:5442
Code: 24 4c 89 e7 e8 0e 88 d4 f7 45 31 f6 4c 8b bc 24 a0 00 00 00 e9 7a fe ff ff e8 19 65 97 f7 0f 0b e9 f6 f7 ff ff e8 0d 65 97 f7 <0f> 0b e9 48 fb ff ff e8 01 65 97 f7 48 c7 c7 a0 09 24 8e 4c 89 e6
RSP: 0018:ffffc90000007a18 EFLAGS: 00010246
RAX: ffffffff89ee2a93 RBX: ffffffff89ee1896 RCX: ffff88801a2dbc00
RDX: 0000000000000100 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 0000000000000000 R08: ffff88801a2dbc00 R09: 0000000000000003
R10: 0000000000000007 R11: 0000000000000100 R12: ffff8880633023c0
R13: dffffc0000000000 R14: ffff8880633028b0 R15: ffff88806559d824
FS:  00007fdd20a566c0(0000) GS:ffff8880b8e00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000020000000c000 CR3: 000000007a1e2000 CR4: 00000000003506f0
Call Trace:
 <IRQ>
 ieee80211_beacon_get_tim+0xb8/0x560 net/mac80211/tx.c:5569
 ieee80211_beacon_get include/net/mac80211.h:5440 [inline]
 mac80211_hwsim_beacon_tx+0x3c7/0x780 drivers/net/wireless/virtual/mac80211_hwsim.c:2265
 __iterate_interfaces+0x243/0x500 net/mac80211/util.c:766
 ieee80211_iterate_active_interfaces_atomic+0xdb/0x180 net/mac80211/util.c:802
 mac80211_hwsim_beacon+0xbb/0x1b0 drivers/net/wireless/virtual/mac80211_hwsim.c:2295
 __run_hrtimer kernel/time/hrtimer.c:1755 [inline]
 __hrtimer_run_queues+0x51e/0xc40 kernel/time/hrtimer.c:1819
 hrtimer_run_softirq+0x187/0x2b0 kernel/time/hrtimer.c:1836
 handle_softirqs+0x280/0x820 kernel/softirq.c:578
 __do_softirq kernel/softirq.c:612 [inline]
 invoke_softirq kernel/softirq.c:452 [inline]
 __irq_exit_rcu+0xc7/0x190 kernel/softirq.c:661
 irq_exit_rcu+0x9/0x20 kernel/softirq.c:673
 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1088 [inline]
 sysvec_apic_timer_interrupt+0xa4/0xc0 arch/x86/kernel/apic/apic.c:1088
 </IRQ>
 <TASK>
 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:687
RIP: 0010:__raw_spin_unlock_irq include/linux/spinlock_api_smp.h:160 [inline]
RIP: 0010:_raw_spin_unlock_irq+0x29/0x50 kernel/locking/spinlock.c:202
Code: 00 f3 0f 1e fa 53 48 89 fb 48 83 c7 18 48 8b 74 24 08 e8 4a e0 ef f6 48 89 df e8 62 b2 f0 f6 e8 1d 51 14 f7 fb bf 01 00 00 00 <e8> b2 c9 e3 f6 65 8b 05 23 18 8c 75 85 c0 74 02 5b c3 e8 00 fa 88
RSP: 0018:ffffc90004b2f9f0 EFLAGS: 00000286
RAX: 4742ebc893870b00 RBX: ffff88814bead230 RCX: 4742ebc893870b00
RDX: dffffc0000000000 RSI: ffffffff8aaaba20 RDI: 0000000000000001
RBP: ffffc90004b2fbb0 R08: ffffffff8e4a8f2f R09: 1ffffffff1c951e5
R10: dffffc0000000000 R11: fffffbfff1c951e6 R12: ffffffff8833f3cd
R13: ffff888065ca1c30 R14: ffff88805808d700 R15: dffffc0000000000
 spin_unlock_irq include/linux/spinlock.h:401 [inline]
 snd_rawmidi_write+0x38e/0xb10 sound/core/rawmidi.c:1673
 do_loop_readv_writev fs/read_write.c:-1 [inline]
 do_iter_write+0x50e/0xc70 fs/read_write.c:862
 vfs_writev fs/read_write.c:933 [inline]
 do_writev+0x252/0x410 fs/read_write.c:976
 do_syscall_x64 arch/x86/entry/common.c:51 [inline]
 do_syscall_64+0x55/0xb0 arch/x86/entry/common.c:81
 entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7fdd1fb8ebe9
Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 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 a8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007fdd20a56038 EFLAGS: 00000246 ORIG_RAX: 0000000000000014
RAX: ffffffffffffffda RBX: 00007fdd1fdc5fa0 RCX: 00007fdd1fb8ebe9
RDX: 0000000000000002 RSI: 0000200000000840 RDI: 0000000000000006
RBP: 00007fdd1fc11e19 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fdd1fdc6038 R14: 00007fdd1fdc5fa0 R15: 00007ffdf6255668
 </TASK>
----------------
Code disassembly (best guess):
   0:	00 f3                	add    %dh,%bl
   2:	0f 1e fa             	nop    %edx
   5:	53                   	push   %rbx
   6:	48 89 fb             	mov    %rdi,%rbx
   9:	48 83 c7 18          	add    $0x18,%rdi
   d:	48 8b 74 24 08       	mov    0x8(%rsp),%rsi
  12:	e8 4a e0 ef f6       	call   0xf6efe061
  17:	48 89 df             	mov    %rbx,%rdi
  1a:	e8 62 b2 f0 f6       	call   0xf6f0b281
  1f:	e8 1d 51 14 f7       	call   0xf7145141
  24:	fb                   	sti
  25:	bf 01 00 00 00       	mov    $0x1,%edi
* 2a:	e8 b2 c9 e3 f6       	call   0xf6e3c9e1 <-- trapping instruction
  2f:	65 8b 05 23 18 8c 75 	mov    %gs:0x758c1823(%rip),%eax        # 0x758c1859
  36:	85 c0                	test   %eax,%eax
  38:	74 02                	je     0x3c
  3a:	5b                   	pop    %rbx
  3b:	c3                   	ret
  3c:	e8                   	.byte 0xe8
  3d:	00 fa                	add    %bh,%dl
  3f:	88                   	.byte 0x88