------------[ cut here ]------------
WARNING: CPU: 1 PID: 4918 at net/mac80211/tx.c:4944 __ieee80211_beacon_update_cntdwn net/mac80211/tx.c:4944 [inline]
WARNING: CPU: 1 PID: 4918 at net/mac80211/tx.c:4944 __ieee80211_beacon_get+0x1952/0x1f50 net/mac80211/tx.c:5265
Modules linked in:
CPU: 1 PID: 4918 Comm: syz.0.103 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/18/2025
RIP: 0010:__ieee80211_beacon_update_cntdwn net/mac80211/tx.c:4944 [inline]
RIP: 0010:__ieee80211_beacon_get+0x1952/0x1f50 net/mac80211/tx.c:5265
Code: ff ff ff e8 20 2d e4 f7 0f 0b 48 8b 7c 24 20 e8 d4 9f 7f fe e9 dd e9 ff ff e8 0a 2d e4 f7 0f 0b e9 f1 ee ff ff e8 fe 2c e4 f7 <0f> 0b e9 61 f2 ff ff e8 f2 2c e4 f7 48 c7 c7 f0 7e fa 8d 4c 89 f6
RSP: 0018:ffffc900001e08a0 EFLAGS: 00010246
RAX: ffffffff899ca1f2 RBX: 0000000000000000 RCX: ffff8880258f0000
RDX: 0000000000000100 RSI: 0000000000000000 RDI: 0000000000000000
RBP: ffffc900001e0aa8 R08: ffff8880258f0000 R09: 0000000000000003
R10: 0000000000000007 R11: 0000000000000100 R12: 1ffff9200003c12c
R13: dffffc0000000000 R14: ffff88802fe56258 R15: ffff8880747bde00
FS:  0000000000000000(0000) GS:ffff8880b8f00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fe2405eddac CR3: 000000002ee77000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <IRQ>
 ieee80211_beacon_get_tim+0x5b/0x4d0 net/mac80211/tx.c:5352
 ieee80211_beacon_get include/net/mac80211.h:5264 [inline]
 mac80211_hwsim_beacon_tx+0x21c/0xae0 drivers/net/wireless/mac80211_hwsim.c:2091
 __iterate_interfaces+0x243/0x500 net/mac80211/util.c:788
 ieee80211_iterate_active_interfaces_atomic+0xd7/0x170 net/mac80211/util.c:824
 mac80211_hwsim_beacon+0xb7/0x1b0 drivers/net/wireless/mac80211_hwsim.c:2147
 __run_hrtimer kernel/time/hrtimer.c:1747 [inline]
 __hrtimer_run_queues+0x554/0xd60 kernel/time/hrtimer.c:1811
 hrtimer_run_softirq+0x183/0x2a0 kernel/time/hrtimer.c:1828
 handle_softirqs+0x2a1/0x920 kernel/softirq.c:596
 __do_softirq kernel/softirq.c:630 [inline]
 invoke_softirq kernel/softirq.c:470 [inline]
 __irq_exit_rcu+0x12f/0x220 kernel/softirq.c:679
 irq_exit_rcu+0x5/0x20 kernel/softirq.c:691
 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1118 [inline]
 sysvec_apic_timer_interrupt+0xa0/0xc0 arch/x86/kernel/apic/apic.c:1118
 </IRQ>
 <TASK>
 asm_sysvec_apic_timer_interrupt+0x16/0x20 arch/x86/include/asm/idtentry.h:691
RIP: 0010:preempt_count_add+0x13c/0x190 kernel/sched/core.c:5713
Code: 48 c7 c1 40 91 be 96 80 e1 07 80 c1 03 38 c1 0f 8c 00 ff ff ff 89 fb 48 c7 c7 40 91 be 96 e8 3b 3a 79 00 89 df e9 eb fe ff ff <48> c7 c1 40 91 be 96 80 e1 07 80 c1 03 38 c1 0f 8c 05 ff ff ff 89
RSP: 0018:ffffc900034373b0 EFLAGS: 00000202
RAX: 0000000000000004 RBX: ffffc900034374a8 RCX: ffffffff96be9103
RDX: dffffc0000000000 RSI: ffffffff812c9d70 RDI: 0000000000000001
RBP: ffffc900034374f0 R08: ffffc90003437570 R09: 0000000000000009
R10: fffff52000686ea1 R11: 1ffff92000686e9f R12: ffffffff812c9d70
R13: ffffc90003437cc0 R14: dffffc0000000000 R15: dffffc0000000000
 unwind_next_frame+0xaf/0x20b0 arch/x86/kernel/unwind_orc.c:433
 arch_stack_walk+0x10c/0x140 arch/x86/kernel/stacktrace.c:25
 stack_trace_save+0x98/0xe0 kernel/stacktrace.c:122
 save_stack+0xf3/0x1e0 mm/page_owner.c:127
 __reset_page_owner+0x51/0x1a0 mm/page_owner.c:148
 reset_page_owner include/linux/page_owner.h:24 [inline]
 free_pages_prepare mm/page_alloc.c:1459 [inline]
 free_pcp_prepare mm/page_alloc.c:1509 [inline]
 free_unref_page_prepare+0x8b4/0x9a0 mm/page_alloc.c:3384
 free_unref_page+0x2e/0x3f0 mm/page_alloc.c:3479
 __vunmap+0x856/0xa00 mm/vmalloc.c:2726
 kcov_put kernel/kcov.c:437 [inline]
 kcov_close+0x27/0x50 kernel/kcov.c:533
 __fput+0x22c/0x920 fs/file_table.c:320
 task_work_run+0x1ca/0x250 kernel/task_work.c:203
 exit_task_work include/linux/task_work.h:39 [inline]
 do_exit+0x93e/0x2400 kernel/exit.c:880
 do_group_exit+0x217/0x2d0 kernel/exit.c:1022
 get_signal+0x1272/0x1350 kernel/signal.c:2871
 arch_do_signal_or_restart+0xb0/0x1230 arch/x86/kernel/signal.c:871
 exit_to_user_mode_loop+0x70/0x110 kernel/entry/common.c:174
 exit_to_user_mode_prepare+0xee/0x180 kernel/entry/common.c:210
 __syscall_exit_to_user_mode_work kernel/entry/common.c:292 [inline]
 syscall_exit_to_user_mode+0x16/0x40 kernel/entry/common.c:303
 do_syscall_64+0x58/0xa0 arch/x86/entry/common.c:87
 entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7f4cf35c14e5
Code: Unable to access opcode bytes at 0x7f4cf35c14bb.
RSP: 002b:00007f4cf0ff1f80 EFLAGS: 00000293 ORIG_RAX: 00000000000000e6
RAX: fffffffffffffdfc RBX: 00007f4cf37d6360 RCX: 00007f4cf35c14e5
RDX: 00007f4cf0ff1fc0 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 00007f4cf3611e41 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000293 R12: 0000000000000000
R13: 00007f4cf37d63f8 R14: 00007f4cf37d6360 R15: 00007ffc5a116fd8
 </TASK>
----------------
Code disassembly (best guess):
   0:	48 c7 c1 40 91 be 96 	mov    $0xffffffff96be9140,%rcx
   7:	80 e1 07             	and    $0x7,%cl
   a:	80 c1 03             	add    $0x3,%cl
   d:	38 c1                	cmp    %al,%cl
   f:	0f 8c 00 ff ff ff    	jl     0xffffff15
  15:	89 fb                	mov    %edi,%ebx
  17:	48 c7 c7 40 91 be 96 	mov    $0xffffffff96be9140,%rdi
  1e:	e8 3b 3a 79 00       	call   0x793a5e
  23:	89 df                	mov    %ebx,%edi
  25:	e9 eb fe ff ff       	jmp    0xffffff15
* 2a:	48 c7 c1 40 91 be 96 	mov    $0xffffffff96be9140,%rcx <-- trapping instruction
  31:	80 e1 07             	and    $0x7,%cl
  34:	80 c1 03             	add    $0x3,%cl
  37:	38 c1                	cmp    %al,%cl
  39:	0f 8c 05 ff ff ff    	jl     0xffffff44
  3f:	89                   	.byte 0x89