------------[ cut here ]------------
WARNING: CPU: 1 PID: 4486 at net/mac80211/tx.c:4859 __ieee80211_beacon_update_cntdwn net/mac80211/tx.c:4859 [inline]
WARNING: CPU: 1 PID: 4486 at net/mac80211/tx.c:4859 __ieee80211_beacon_get+0x172c/0x1f80 net/mac80211/tx.c:5083
Modules linked in:
CPU: 1 PID: 4486 Comm: syz.3.44 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/02/2025
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 01 51 3a f8 0f 0b 4c 8b 74 24 08 e9 36 fe ff ff e8 f0 50 3a f8 0f 0b e9 3c ef ff ff e8 e4 50 3a f8 <0f> 0b e9 b8 f2 ff ff e8 98 f2 6b 00 44 89 e1 80 e1 07 80 c1 03 38
vkms_vblank_simulate: vblank timer overrun
RSP: 0018:ffffc90000dd08c0 EFLAGS: 00010246
RAX: ffffffff893d7b2c RBX: ffff88805f074c80 RCX: ffff888021edd940
RDX: 0000000000000100 RSI: 0000000000000000 RDI: 0000000000000000
RBP: ffffc90000dd0ae8 R08: ffff888021edd940 R09: 0000000000000003
R10: 0000000000000007 R11: 0000000000000100 R12: ffff888079204e00
R13: dffffc0000000000 R14: 0000000000000000 R15: 1ffff920001ba128
FS:  00007f47fde4f6c0(0000) GS:ffff8880b9100000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000020000037b030 CR3: 00000000220d6000 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:1685 [inline]
 __hrtimer_run_queues+0x53d/0xc40 kernel/time/hrtimer.c:1749
 hrtimer_run_softirq+0x176/0x240 kernel/time/hrtimer.c:1766
 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:sk_has_account include/net/sock.h:1576 [inline]
RIP: 0010:sk_mem_reclaim_partial include/net/sock.h:1617 [inline]
RIP: 0010:skb_free_datagram+0x48/0xe0 net/core/datagram.c:326
Code: 89 f7 e8 0b d9 fc ff 4c 8d 73 28 4c 89 f0 48 c1 e8 03 42 80 3c 20 00 74 08 4c 89 f7 e8 d1 19 e9 f9 41 bf 00 01 00 00 4d 03 3e <4c> 89 f8 48 c1 e8 03 42 80 3c 20 00 74 08 4c 89 ff e8 b2 19 e9 f9
vkms_vblank_simulate: vblank timer overrun
RSP: 0018:ffffc90003a27730 EFLAGS: 00000286
RAX: 1ffff1100e83fa05 RBX: ffff8880741fd000 RCX: 0000000000080000
RDX: ffffc9000e91c000 RSI: 000000000007ffff RDI: 0000000000080000
RBP: ffffc90003a278f0 R08: dffffc0000000000 R09: ffffed1003f22bd4
R10: ffffed1003f22bd4 R11: 1ffff11003f22bd3 R12: dffffc0000000000
R13: ffffc90003a27d40 R14: ffff8880741fd028 R15: ffffffff8d32d060
 __unix_dgram_recvmsg+0x9cc/0xd50 net/unix/af_unix.c:2395
 ____sys_recvmsg+0x291/0x580 net/socket.c:-1
 ___sys_recvmsg+0x1af/0x4f0 net/socket.c:2707
 do_recvmmsg+0x344/0x7a0 net/socket.c:2801
 __sys_recvmmsg net/socket.c:2880 [inline]
 __do_sys_recvmmsg net/socket.c:2903 [inline]
 __se_sys_recvmmsg net/socket.c:2896 [inline]
 __x64_sys_recvmmsg+0x18d/0x240 net/socket.c:2896
 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: 0033:0x7f47ffc096c9
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:00007f47fde4f038 EFLAGS: 00000246 ORIG_RAX: 000000000000012b
RAX: ffffffffffffffda RBX: 00007f47ffe60090 RCX: 00007f47ffc096c9
RDX: 0000000000010106 RSI: 00002000000000c0 RDI: 0000000000000003
RBP: 00007f47ffc8bf91 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000002 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f47ffe60128 R14: 00007f47ffe60090 R15: 00007ffce1c30a48
 </TASK>
----------------
Code disassembly (best guess):
   0:	89 f7                	mov    %esi,%edi
   2:	e8 0b d9 fc ff       	call   0xfffcd912
   7:	4c 8d 73 28          	lea    0x28(%rbx),%r14
   b:	4c 89 f0             	mov    %r14,%rax
   e:	48 c1 e8 03          	shr    $0x3,%rax
  12:	42 80 3c 20 00       	cmpb   $0x0,(%rax,%r12,1)
  17:	74 08                	je     0x21
  19:	4c 89 f7             	mov    %r14,%rdi
  1c:	e8 d1 19 e9 f9       	call   0xf9e919f2
  21:	41 bf 00 01 00 00    	mov    $0x100,%r15d
  27:	4d 03 3e             	add    (%r14),%r15
* 2a:	4c 89 f8             	mov    %r15,%rax <-- trapping instruction
  2d:	48 c1 e8 03          	shr    $0x3,%rax
  31:	42 80 3c 20 00       	cmpb   $0x0,(%rax,%r12,1)
  36:	74 08                	je     0x40
  38:	4c 89 ff             	mov    %r15,%rdi
  3b:	e8 b2 19 e9 f9       	call   0xf9e919f2