------------[ cut here ]------------
WARNING: CPU: 1 PID: 20202 at net/mac80211/tx.c:4859 __ieee80211_beacon_update_cntdwn net/mac80211/tx.c:4859 [inline]
WARNING: CPU: 1 PID: 20202 at net/mac80211/tx.c:4859 __ieee80211_beacon_get+0x179f/0x2000 net/mac80211/tx.c:5083
Modules linked in:
CPU: 1 PID: 20202 Comm: syz.1.3936 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
RSP: 0018:ffffc90000dd08e0 EFLAGS: 00010246
RAX: ffffffff894e5f9f RBX: ffff888070dd6298 RCX: ffff888062a39dc0
RDX: 0000000000000100 RSI: 0000000000000000 RDI: 0000000000000000
RBP: ffffc90000dd0b08 R08: ffff888062a39dc0 R09: 0000000000000003
R10: 0000000000000007 R11: 0000000000000100 R12: ffff8880232a2400
R13: dffffc0000000000 R14: 0000000000000000 R15: 1ffff920001ba12c
FS:  0000000000000000(0000) GS:ffff8880b9100000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000110c2bcf9e CR3: 000000000c08e000 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+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:_compound_head include/linux/page-flags.h:196 [inline]
RIP: 0010:PageLRU include/linux/page-flags.h:350 [inline]
RIP: 0010:mark_page_accessed+0x3f3/0x12b0 mm/swap.c:421
Code: ff e8 41 ef 1b 00 4d 8b 27 48 c7 c7 ff ff ff ff 4c 89 e6 e8 ef ee d6 ff 48 8b 04 24 80 3c 28 00 74 08 4c 89 f7 e8 1d ef 1b 00 <4d> 8b 3e 45 89 fd 41 83 e5 01 31 ff 4c 89 ee e8 c9 ee d6 ff 49 83
RSP: 0018:ffffc90002dff508 EFLAGS: 00000246
RAX: 1ffffd40002b5e59 RBX: ffffea00015af2c0 RCX: ffff888062a39dc0
RDX: 0000000000000000 RSI: 00fff0000008001e RDI: ffffffffffffffff
RBP: dffffc0000000000 R08: ffffea00015af2c7 R09: 1ffffd40002b5e58
R10: dffffc0000000000 R11: fffff940002b5e59 R12: 00fff0000008001e
R13: 0000000000000000 R14: ffffea00015af2c8 R15: ffffea00015af2c0
 zap_pte_range mm/memory.c:1381 [inline]
 zap_pmd_range mm/memory.c:1505 [inline]
 zap_pud_range mm/memory.c:1534 [inline]
 zap_p4d_range mm/memory.c:1555 [inline]
 unmap_page_range+0xde9/0x2500 mm/memory.c:1576
 unmap_vmas+0x131/0x250 mm/memory.c:1653
 exit_mmap+0x3b9/0x640 mm/mmap.c:3216
 __mmput+0x115/0x3b0 kernel/fork.c:1127
 exit_mm+0x588/0x6e0 kernel/exit.c:550
 do_exit+0x5a9/0x20c0 kernel/exit.c:870
 do_group_exit+0x12e/0x300 kernel/exit.c:997
 get_signal+0x6ca/0x12c0 kernel/signal.c:2900
 arch_do_signal_or_restart+0xe7/0x12c0 arch/x86/kernel/signal.c:867
 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: 0033:0x7f56d16f5cb9
Code: Unable to access opcode bytes at RIP 0x7f56d16f5c8f.
RSP: 002b:00007f56cf930028 EFLAGS: 00000246 ORIG_RAX: 000000000000012b
RAX: 0000000000010106 RBX: 00007f56d1971090 RCX: 00007f56d16f5cb9
RDX: 0000000000010106 RSI: 00002000000000c0 RDI: 0000000000000006
RBP: 00007f56d1763bf7 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000002 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f56d1971128 R14: 00007f56d1971090 R15: 00007fff7fdc4158
 </TASK>
----------------
Code disassembly (best guess):
   0:	ff                   	ljmp   (bad)
   1:	e8 41 ef 1b 00       	call   0x1bef47
   6:	4d 8b 27             	mov    (%r15),%r12
   9:	48 c7 c7 ff ff ff ff 	mov    $0xffffffffffffffff,%rdi
  10:	4c 89 e6             	mov    %r12,%rsi
  13:	e8 ef ee d6 ff       	call   0xffd6ef07
  18:	48 8b 04 24          	mov    (%rsp),%rax
  1c:	80 3c 28 00          	cmpb   $0x0,(%rax,%rbp,1)
  20:	74 08                	je     0x2a
  22:	4c 89 f7             	mov    %r14,%rdi
  25:	e8 1d ef 1b 00       	call   0x1bef47
* 2a:	4d 8b 3e             	mov    (%r14),%r15 <-- trapping instruction
  2d:	45 89 fd             	mov    %r15d,%r13d
  30:	41 83 e5 01          	and    $0x1,%r13d
  34:	31 ff                	xor    %edi,%edi
  36:	4c 89 ee             	mov    %r13,%rsi
  39:	e8 c9 ee d6 ff       	call   0xffd6ef07
  3e:	49                   	rex.WB
  3f:	83                   	.byte 0x83