vkms_vblank_simulate: vblank timer overrun
------------[ cut here ]------------
WARNING: CPU: 1 PID: 11433 at net/mac80211/tx.c:4859 __ieee80211_beacon_update_cntdwn net/mac80211/tx.c:4859 [inline]
WARNING: CPU: 1 PID: 11433 at net/mac80211/tx.c:4859 __ieee80211_beacon_get+0x172c/0x1f80 net/mac80211/tx.c:5083
Modules linked in:
CPU: 1 PID: 11433 Comm: syz.7.1642 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 51 6c 3a f8 0f 0b 4c 8b 74 24 08 e9 36 fe ff ff e8 40 6c 3a f8 0f 0b e9 3c ef ff ff e8 34 6c 3a f8 <0f> 0b e9 b8 f2 ff ff e8 68 ef 6b 00 44 89 e1 80 e1 07 80 c1 03 38
RSP: 0018:ffffc90000dd08c0 EFLAGS: 00010246
RAX: ffffffff893d5e5c RBX: ffff88801ade4c80 RCX: ffff88801898bb80
RDX: 0000000000000100 RSI: 0000000000000000 RDI: 0000000000000000
RBP: ffffc90000dd0ae8 R08: ffff88801898bb80 R09: 0000000000000003
R10: 0000000000000007 R11: 0000000000000100 R12: ffff88802bb3b400
R13: dffffc0000000000 R14: 0000000000000000 R15: 1ffff920001ba128
FS:  00007f3dfb5746c0(0000) GS:ffff8880b9100000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000110c275387 CR3: 000000001f198000 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:PagePoisoned include/linux/page-flags.h:218 [inline]
RIP: 0010:PageLocked include/linux/page-flags.h:342 [inline]
RIP: 0010:next_uptodate_page+0x116/0x8b0 mm/filemap.c:3254
Code: e7 d9 ff 41 f6 c7 01 0f 85 83 05 00 00 e8 b2 e3 d9 ff 49 89 df 4c 89 f8 48 c1 e8 03 80 3c 28 00 74 08 4c 89 ff e8 6a 4b 1e 00 <4d> 8b 27 48 c7 c7 ff ff ff ff 4c 89 e6 e8 68 e7 d9 ff 41 80 3c 2e
RSP: 0018:ffffc900030bf6f8 EFLAGS: 00000246
RAX: 1ffffd40002a2850 RBX: ffffea0001514280 RCX: 0000000000080000
RDX: ffffc90015c11000 RSI: 000000000007ffff RDI: 0000000000080000
RBP: dffffc0000000000 R08: ffff88801898bb80 R09: 0000000000000002
R10: 0000000000000406 R11: 0000000000000002 R12: ffffc900030bf820
R13: ffffea0001514288 R14: 1ffffd40002a2851 R15: ffffea0001514280
 next_map_page mm/filemap.c:3296 [inline]
 filemap_map_pages+0xebd/0x1390 mm/filemap.c:3352
 do_fault_around mm/memory.c:4243 [inline]
 do_read_fault mm/memory.c:4258 [inline]
 do_fault mm/memory.c:4392 [inline]
 handle_pte_fault mm/memory.c:4650 [inline]
 __handle_mm_fault mm/memory.c:4785 [inline]
 handle_mm_fault+0x257d/0x43b0 mm/memory.c:4883
 faultin_page mm/gup.c:976 [inline]
 __get_user_pages+0x93e/0x11c0 mm/gup.c:1197
 populate_vma_page_range+0x213/0x290 mm/gup.c:1529
 __mm_populate+0x26f/0x3a0 mm/gup.c:1638
 mm_populate include/linux/mm.h:2646 [inline]
 vm_mmap_pgoff+0x203/0x2b0 mm/util.c:556
 ksys_mmap_pgoff+0x140/0x780 mm/mmap.c:1635
 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: 0033:0x7f3dfd30cfc9
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:00007f3dfb574038 EFLAGS: 00000246 ORIG_RAX: 0000000000000009
RAX: ffffffffffffffda RBX: 00007f3dfd563fa0 RCX: 00007f3dfd30cfc9
RDX: b635773f07ebbeeb RSI: 0000000000b36000 RDI: 0000200000000000
RBP: 00007f3dfd38ff91 R08: ffffffffffffffff R09: 00000000c36e5000
R10: 0000000000008031 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f3dfd564038 R14: 00007f3dfd563fa0 R15: 00007ffc784ee1a8
 </TASK>
----------------
Code disassembly (best guess):
   0:	e7 d9                	out    %eax,$0xd9
   2:	ff 41 f6             	incl   -0xa(%rcx)
   5:	c7 01 0f 85 83 05    	movl   $0x583850f,(%rcx)
   b:	00 00                	add    %al,(%rax)
   d:	e8 b2 e3 d9 ff       	call   0xffd9e3c4
  12:	49 89 df             	mov    %rbx,%r15
  15:	4c 89 f8             	mov    %r15,%rax
  18:	48 c1 e8 03          	shr    $0x3,%rax
  1c:	80 3c 28 00          	cmpb   $0x0,(%rax,%rbp,1)
  20:	74 08                	je     0x2a
  22:	4c 89 ff             	mov    %r15,%rdi
  25:	e8 6a 4b 1e 00       	call   0x1e4b94
* 2a:	4d 8b 27             	mov    (%r15),%r12 <-- trapping instruction
  2d:	48 c7 c7 ff ff ff ff 	mov    $0xffffffffffffffff,%rdi
  34:	4c 89 e6             	mov    %r12,%rsi
  37:	e8 68 e7 d9 ff       	call   0xffd9e7a4
  3c:	41                   	rex.B
  3d:	80                   	.byte 0x80
  3e:	3c 2e                	cmp    $0x2e,%al