------------[ cut here ]------------
WARNING: CPU: 0 PID: 9320 at net/mac80211/tx.c:4859 __ieee80211_beacon_update_cntdwn net/mac80211/tx.c:4859 [inline]
WARNING: CPU: 0 PID: 9320 at net/mac80211/tx.c:4859 __ieee80211_beacon_get+0x179f/0x2000 net/mac80211/tx.c:5083
Modules linked in:
CPU: 0 PID: 9320 Comm: syz.2.1143 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/25/2025
RIP: 0010:__ieee80211_beacon_update_cntdwn net/mac80211/tx.c:4859 [inline]
RIP: 0010:__ieee80211_beacon_get+0x179f/0x2000 net/mac80211/tx.c:5083
Code: 2a 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 0d c0 2a f8 0f 0b e9 03 ef ff ff e8 01 c0 2a f8 <0f> 0b e9 76 f2 ff ff e8 15 89 6d 00 89 d9 80 e1 07 80 c1 03 38 c1
vkms_vblank_simulate: vblank timer overrun
RSP: 0018:ffffc900000078e0 EFLAGS: 00010246
RAX: ffffffff894e5f9f RBX: ffff888077e0e298 RCX: ffff888064245940
RDX: 0000000000000100 RSI: 0000000000000000 RDI: 0000000000000000
RBP: ffffc90000007b08 R08: ffff888064245940 R09: 0000000000000003
R10: 0000000000000007 R11: 0000000000000100 R12: ffff888017a78a00
R13: dffffc0000000000 R14: 0000000000000000 R15: 1ffff92000000f2c
FS:  00007f84ad2cd6c0(0000) GS:ffff8880b9000000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b3361fff8 CR3: 000000005b00e000 CR4: 00000000003506f0
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:5202
 ieee80211_beacon_get include/net/mac80211.h:4983 [inline]
 mac80211_hwsim_beacon_tx+0xf4/0x920 drivers/net/wireless/mac80211_hwsim.c:1812
 __iterate_interfaces+0x243/0x500 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+0x4eb/0xb70 kernel/time/hrtimer.c:1749
 hrtimer_run_softirq+0x176/0x240 kernel/time/hrtimer.c:1766
 handle_softirqs+0x339/0x830 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:preempt_count_sub+0x61/0x160 kernel/sched/core.c:5548
Code: ff ff ff 7f 39 cf 7f 25 81 ff ff 00 00 00 0f 93 c1 84 c0 0f 95 c0 08 c8 74 53 65 8b 05 30 0c b0 7e f7 df 65 01 3d 27 0c b0 7e <5b> 5d c3 e8 e7 2c 8e 02 85 c0 74 f4 48 c7 c0 48 0c 8a 8d 48 c1 e8
vkms_vblank_simulate: vblank timer overrun
RSP: 0018:ffffc9000410fca8 EFLAGS: 00000297
RAX: 0000000080000001 RBX: dffffc0000000000 RCX: 0000000000000000
RDX: 0000000000000001 RSI: 0000000000000008 RDI: 00000000ffffffff
RBP: ffffc9000410fec0 R08: ffff888064246ecf R09: 1ffff1100c848dd9
R10: dffffc0000000000 R11: ffffed100c848dda R12: dffffc0000000000
R13: ffff888064245940 R14: 0000000000000021 R15: ffffc9000410fde0
 rseq_signal_deliver include/linux/sched.h:2211 [inline]
 setup_rt_frame arch/x86/kernel/signal.c:769 [inline]
 handle_signal arch/x86/kernel/signal.c:824 [inline]
 arch_do_signal_or_restart+0x247/0x12c0 arch/x86/kernel/signal.c:869
 handle_signal_work kernel/entry/common.c:154 [inline]
 exit_to_user_mode_loop+0x9e/0x130 kernel/entry/common.c:178
 exit_to_user_mode_prepare+0xee/0x180 kernel/entry/common.c:214
 __syscall_exit_to_user_mode_work kernel/entry/common.c:296 [inline]
 syscall_exit_to_user_mode+0x16/0x40 kernel/entry/common.c:307
 do_syscall_64+0x58/0xa0 arch/x86/entry/common.c:86
 entry_SYSCALL_64_after_hwframe+0x66/0xd0
RIP: 0033:0x7f84af071cb7
Code: 83 c8 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
vkms_vblank_simulate: vblank timer overrun
RSP: 002b:00007f84ad2cd028 EFLAGS: 00000246 ORIG_RAX: 0000000000000048
RAX: 0000000000000048 RBX: 00007f84af2ecfa0 RCX: 00007f84af071cb9
RDX: 0000200000000280 RSI: 0000000000000026 RDI: 0000000000000003
RBP: 00007f84af0dfbf7 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f84af2ed038 R14: 00007f84af2ecfa0 R15: 00007ffd9253c7a8
 </TASK>
----------------
Code disassembly (best guess), 3 bytes skipped:
   0:	7f 39                	jg     0x3b
   2:	cf                   	iret
   3:	7f 25                	jg     0x2a
   5:	81 ff ff 00 00 00    	cmp    $0xff,%edi
   b:	0f 93 c1             	setae  %cl
   e:	84 c0                	test   %al,%al
  10:	0f 95 c0             	setne  %al
  13:	08 c8                	or     %cl,%al
  15:	74 53                	je     0x6a
  17:	65 8b 05 30 0c b0 7e 	mov    %gs:0x7eb00c30(%rip),%eax        # 0x7eb00c4e
  1e:	f7 df                	neg    %edi
  20:	65 01 3d 27 0c b0 7e 	add    %edi,%gs:0x7eb00c27(%rip)        # 0x7eb00c4e
* 27:	5b                   	pop    %rbx <-- trapping instruction
  28:	5d                   	pop    %rbp
  29:	c3                   	ret
  2a:	e8 e7 2c 8e 02       	call   0x28e2d16
  2f:	85 c0                	test   %eax,%eax
  31:	74 f4                	je     0x27
  33:	48 c7 c0 48 0c 8a 8d 	mov    $0xffffffff8d8a0c48,%rax
  3a:	48                   	rex.W
  3b:	c1                   	.byte 0xc1
  3c:	e8                   	.byte 0xe8