------------[ cut here ]------------
WARNING: CPU: 1 PID: 8359 at net/mac80211/tx.c:4883 __ieee80211_beacon_update_cntdwn net/mac80211/tx.c:4883 [inline]
WARNING: CPU: 1 PID: 8359 at net/mac80211/tx.c:4883 __ieee80211_beacon_get+0x178a/0x1ff0 net/mac80211/tx.c:5107
Modules linked in:
CPU: 1 PID: 8359 Comm: syz.8.760 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/15/2026
RIP: 0010:__ieee80211_beacon_update_cntdwn net/mac80211/tx.c:4883 [inline]
RIP: 0010:__ieee80211_beacon_get+0x178a/0x1ff0 net/mac80211/tx.c:5107
Code: 1d 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 12 8f 1d f8 0f 0b e9 16 ef ff ff e8 06 8f 1d f8 <0f> 0b e9 7c f2 ff ff e8 ba ec 6d 00 89 d9 80 e1 07 80 c1 03 38 c1
RSP: 0018:ffffc90000dd08c0 EFLAGS: 00010246
RAX: ffffffff895b9e8a RBX: ffff888023e19c00 RCX: ffff8880208c0000
RDX: 0000000000000100 RSI: 0000000000000000 RDI: 0000000000000000
RBP: ffffc90000dd0af8 R08: ffff8880208c0000 R09: 0000000000000003
R10: 0000000000000007 R11: 0000000000000100 R12: f8f8f8f8f8f8f8f8
R13: dffffc0000000000 R14: 0000000000000000 R15: 1ffff920001ba128
FS:  00007f5d90bb26c0(0000) GS:ffff8880b8f00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b3011dff8 CR3: 000000002c260000 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:5226
 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:finish_lock_switch+0x12f/0x290 kernel/sched/core.c:4804
Code: 83 c7 18 be ff ff ff ff e8 9e 2b 75 08 85 c0 74 46 4d 85 ff 75 62 e9 06 01 00 00 48 89 df e8 38 9f 7e 08 e8 33 f7 2a 00 fb 5b <41> 5c 41 5d 41 5e 41 5f 5d c3 48 89 df e8 2f 0e fe ff 43 80 3c 2c
RSP: 0018:ffffc90003cbf718 EFLAGS: 00000282
RAX: acc5b64c4e6b0c00 RBX: ffff88801eb71dc0 RCX: acc5b64c4e6b0c00
RDX: dffffc0000000000 RSI: ffffffff8a2b2b60 RDI: ffffffff8a7a5100
RBP: 1ffff110171e7613 R08: ffff8880b8e3a343 R09: 1ffff110171c7468
R10: dffffc0000000000 R11: ffffed10171c7469 R12: ffff8880b8f3b088
R13: dffffc0000000000 R14: ffff8880b8f3ae08 R15: 0000000000000000
 finish_task_switch+0x12f/0x650 kernel/sched/core.c:4921
 context_switch kernel/sched/core.c:5052 [inline]
 __schedule+0x11cb/0x4350 kernel/sched/core.c:6395
 schedule+0x11b/0x1e0 kernel/sched/core.c:6478
 schedule_timeout+0x184/0x2d0 kernel/time/timer.c:2117
 snd_rawmidi_write+0x3ca/0xb90 sound/core/rawmidi.c:1542
 do_loop_readv_writev fs/read_write.c:-1 [inline]
 do_iter_write+0x3c3/0x7a0 fs/read_write.c:857
 vfs_writev fs/read_write.c:928 [inline]
 do_writev+0x281/0x480 fs/read_write.c:971
 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: 0033:0x7f5d9295bb19
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:00007f5d90bb2028 EFLAGS: 00000246 ORIG_RAX: 0000000000000014
RAX: ffffffffffffffda RBX: 00007f5d92be1fa0 RCX: 00007f5d9295bb19
RDX: 0000000000000002 RSI: 0000200000000940 RDI: 0000000000000008
RBP: 00007f5d929f3b70 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f5d92be2038 R14: 00007f5d92be1fa0 R15: 00007fff3452e7a8
 </TASK>
----------------
Code disassembly (best guess):
   0:	83 c7 18             	add    $0x18,%edi
   3:	be ff ff ff ff       	mov    $0xffffffff,%esi
   8:	e8 9e 2b 75 08       	call   0x8752bab
   d:	85 c0                	test   %eax,%eax
   f:	74 46                	je     0x57
  11:	4d 85 ff             	test   %r15,%r15
  14:	75 62                	jne    0x78
  16:	e9 06 01 00 00       	jmp    0x121
  1b:	48 89 df             	mov    %rbx,%rdi
  1e:	e8 38 9f 7e 08       	call   0x87e9f5b
  23:	e8 33 f7 2a 00       	call   0x2af75b
  28:	fb                   	sti
  29:	5b                   	pop    %rbx
* 2a:	41 5c                	pop    %r12 <-- trapping instruction
  2c:	41 5d                	pop    %r13
  2e:	41 5e                	pop    %r14
  30:	41 5f                	pop    %r15
  32:	5d                   	pop    %rbp
  33:	c3                   	ret
  34:	48 89 df             	mov    %rbx,%rdi
  37:	e8 2f 0e fe ff       	call   0xfffe0e6b
  3c:	43                   	rex.XB
  3d:	80                   	.byte 0x80
  3e:	3c 2c                	cmp    $0x2c,%al