------------[ cut here ]------------
WARNING: CPU: 1 PID: 16253 at net/mac80211/tx.c:4859 __ieee80211_beacon_update_cntdwn net/mac80211/tx.c:4859 [inline]
WARNING: CPU: 1 PID: 16253 at net/mac80211/tx.c:4859 __ieee80211_beacon_get+0x172c/0x1f80 net/mac80211/tx.c:5083
Modules linked in:
CPU: 1 PID: 16253 Comm: syz.1.2482 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/14/2025
RIP: 0010:__ieee80211_beacon_update_cntdwn net/mac80211/tx.c:4859 [inline]
RIP: 0010:__ieee80211_beacon_get+0x172c/0x1f80 net/mac80211/tx.c:5083
Code: f8 0f 0b e9 f1 fa ff ff e8 51 b6 3a f8 0f 0b 4c 8b 74 24 08 e9 36 fe ff ff e8 40 b6 3a f8 0f 0b e9 3c ef ff ff e8 34 b6 3a f8 <0f> 0b e9 b8 f2 ff ff e8 48 d9 6b 00 44 89 e1 80 e1 07 80 c1 03 38
RSP: 0018:ffffc90000dd08c0 EFLAGS: 00010246
RAX: ffffffff893d147c RBX: ffff888038540c80 RCX: ffff888077080000
RDX: 0000000000000100 RSI: 0000000000000000 RDI: 0000000000000000
RBP: ffffc90000dd0ae8 R08: ffff888077080000 R09: 0000000000000003
R10: 0000000000000007 R11: 0000000000000100 R12: ffff8880626ed400
R13: dffffc0000000000 R14: 0000000000000000 R15: 1ffff920001ba128
FS:  00007fce9e9286c0(0000) GS:ffff8880b9100000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000110c32ee57 CR3: 0000000084074000 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: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:1690 [inline]
 __hrtimer_run_queues+0x53d/0xc40 kernel/time/hrtimer.c:1754
 hrtimer_run_softirq+0x176/0x240 kernel/time/hrtimer.c:1771
 handle_softirqs+0x328/0x820 kernel/softirq.c:576
 __do_softirq kernel/softirq.c:610 [inline]
 invoke_softirq kernel/softirq.c:450 [inline]
 __irq_exit_rcu+0x12f/0x220 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:nf_hook_slow+0x3b/0x200 net/netfilter/core.c:583
Code: 89 d3 49 89 f7 48 89 7c 24 08 49 be 00 00 00 00 00 fc ff df e8 e6 e6 63 f9 48 89 d8 48 c1 e8 03 48 89 44 24 10 42 0f b6 04 30 <84> c0 0f 85 93 01 00 00 44 0f b7 33 89 ef 44 89 f6 e8 1f e8 63 f9
RSP: 0018:ffffc90003a37370 EFLAGS: 00000a06
RAX: 0000000000000000 RBX: ffff888058b88e00 RCX: 0000000000080000
RDX: ffffc900133a9000 RSI: 000000000007ffff RDI: 0000000000080000
RBP: 0000000000000000 R08: dffffc0000000000 R09: fffffbfff1ff7619
R10: fffffbfff1ff7619 R11: 1ffffffff1ff7618 R12: dffffc0000000000
R13: dffffc0000000000 R14: dffffc0000000000 R15: ffffc90003a37420
 nf_hook+0x1f2/0x350 include/linux/netfilter.h:257
 NF_HOOK_COND include/linux/netfilter.h:290 [inline]
 ip_output+0x1ea/0x2b0 net/ipv4/ip_output.c:430
 dst_output include/net/dst.h:452 [inline]
 ip_local_out net/ipv4/ip_output.c:126 [inline]
 ip_send_skb+0x129/0x1c0 net/ipv4/ip_output.c:1581
 udp_send_skb+0x94a/0x1330 net/ipv4/udp.c:991
 udp_sendmsg+0x1aaa/0x2340 net/ipv4/udp.c:1279
 sock_sendmsg_nosec net/socket.c:704 [inline]
 __sock_sendmsg net/socket.c:716 [inline]
 ____sys_sendmsg+0x5a2/0x8c0 net/socket.c:2436
 ___sys_sendmsg+0x1f0/0x260 net/socket.c:2490
 __sys_sendmmsg+0x27c/0x4a0 net/socket.c:2576
 __do_sys_sendmmsg net/socket.c:2605 [inline]
 __se_sys_sendmmsg net/socket.c:2602 [inline]
 __x64_sys_sendmmsg+0x9c/0xb0 net/socket.c:2602
 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: 0033:0x7fcea06c0be9
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
vkms_vblank_simulate: vblank timer overrun
RSP: 002b:00007fce9e928038 EFLAGS: 00000246 ORIG_RAX: 0000000000000133
RAX: ffffffffffffffda RBX: 00007fcea08f7fa0 RCX: 00007fcea06c0be9
RDX: 000000000800001d RSI: 0000200000007fc0 RDI: 0000000000000003
RBP: 00007fcea0743e19 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000300 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fcea08f8038 R14: 00007fcea08f7fa0 R15: 00007ffdcac3fe38
 </TASK>
----------------
Code disassembly (best guess):
   0:	89 d3                	mov    %edx,%ebx
   2:	49 89 f7             	mov    %rsi,%r15
   5:	48 89 7c 24 08       	mov    %rdi,0x8(%rsp)
   a:	49 be 00 00 00 00 00 	movabs $0xdffffc0000000000,%r14
  11:	fc ff df
  14:	e8 e6 e6 63 f9       	call   0xf963e6ff
  19:	48 89 d8             	mov    %rbx,%rax
  1c:	48 c1 e8 03          	shr    $0x3,%rax
  20:	48 89 44 24 10       	mov    %rax,0x10(%rsp)
  25:	42 0f b6 04 30       	movzbl (%rax,%r14,1),%eax
* 2a:	84 c0                	test   %al,%al <-- trapping instruction
  2c:	0f 85 93 01 00 00    	jne    0x1c5
  32:	44 0f b7 33          	movzwl (%rbx),%r14d
  36:	89 ef                	mov    %ebp,%edi
  38:	44 89 f6             	mov    %r14d,%esi
  3b:	e8 1f e8 63 f9       	call   0xf963e85f