------------[ cut here ]------------
WARNING: CPU: 0 PID: 4777 at net/mac80211/tx.c:4859 __ieee80211_beacon_update_cntdwn net/mac80211/tx.c:4859 [inline]
WARNING: CPU: 0 PID: 4777 at net/mac80211/tx.c:4859 __ieee80211_beacon_get+0x179f/0x2000 net/mac80211/tx.c:5083
Modules linked in:
CPU: 0 PID: 4777 Comm: syz.2.126 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2026
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 4d 85 2a f8 0f 0b e9 03 ef ff ff e8 41 85 2a f8 <0f> 0b e9 76 f2 ff ff e8 b5 8b 6d 00 89 d9 80 e1 07 80 c1 03 38 c1
RSP: 0018:ffffc900000078e0 EFLAGS: 00010246
RAX: ffffffff894e9cff RBX: ffff88805dc2a268 RCX: ffff88802279bb80
RDX: 0000000000000100 RSI: 0000000000000000 RDI: 0000000000000000
RBP: ffffc90000007b08 R08: ffff88802279bb80 R09: 0000000000000003
R10: 0000000000000007 R11: 0000000000000100 R12: ffff8880183d4a00
R13: dffffc0000000000 R14: 0000000000000000 R15: 1ffff92000000f2c
FS:  0000555555c8b500(0000) GS:ffff8880b9000000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000110c3d7094 CR3: 000000006052d000 CR4: 00000000003506f0
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:__kasan_check_read+0x0/0x10 mm/kasan/shadow.c:31
Code: 41 5c 41 5d 41 5e 41 5f 5d c3 48 c7 c7 42 d0 de 8b eb 0a 48 c7 c7 5d e4 c4 8b 48 89 de e8 28 52 f3 07 31 ed eb d7 00 00 cc cc <89> f6 48 8b 0c 24 31 d2 e9 43 ef ff ff 0f 1f 00 89 f6 48 8b 0c 24
RSP: 0018:ffffc90003267a70 EFLAGS: 00000213
RAX: 1ffff920002b9236 RBX: ffffea00015d7ac0 RCX: ffff88802279bb80
RDX: 0000000000000000 RSI: 0000000000000008 RDI: ffffea00015d7ac0
RBP: 0000000000000237 R08: ffffffff901d30f7 R09: 1ffffffff203a61e
R10: dffffc0000000000 R11: fffffbfff203a61f R12: 1ffff1100c2398a5
R13: dffffc0000000000 R14: 0000000000000000 R15: 1ffffd40002baf58
 instrument_atomic_read include/linux/instrumented.h:71 [inline]
 test_bit include/asm-generic/bitops/instrumented-non-atomic.h:134 [inline]
 PageHead include/linux/page-flags.h:590 [inline]
 __free_pages+0x47/0x1a0 mm/page_alloc.c:5560
 __vunmap+0x8b9/0xa50 mm/vmalloc.c:2628
 kcov_mmap+0x89/0x120 kernel/kcov.c:498
 call_mmap include/linux/fs.h:2178 [inline]
 mmap_file+0x5d/0xb0 mm/util.c:1092
 __mmap_region mm/mmap.c:1796 [inline]
 mmap_region+0xf88/0x1650 mm/mmap.c:2933
 do_mmap+0x819/0xe90 mm/mmap.c:1586
 vm_mmap_pgoff+0x1c1/0x2d0 mm/util.c:551
 ksys_mmap_pgoff+0x54b/0x790 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: 0033:0x7fdea43fa392
Code: 4f 01 00 0f 1f 44 00 00 41 f7 c1 ff 0f 00 00 75 27 55 89 cd 53 48 89 fb 48 85 ff 74 3b 41 89 ea 48 89 df b8 09 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 6e 5b 5d c3 0f 1f 00 48 c7 c0 e8 ff ff ff 64
RSP: 002b:00007ffc3c17ffa8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009
RAX: ffffffffffffffda RBX: 00007fdea21f1000 RCX: 00007fdea43fa392
RDX: 0000000000000003 RSI: 0000000000400000 RDI: 00007fdea21f1000
RBP: 0000000000000011 R08: 00000000000000db R09: 0000000000000000
R10: 0000000000000011 R11: 0000000000000206 R12: 0000000000000003
R13: 0000000000000007 R14: 0000000000000000 R15: 00007fdea4673fa0
 </TASK>
----------------
Code disassembly (best guess):
   0:	41 5c                	pop    %r12
   2:	41 5d                	pop    %r13
   4:	41 5e                	pop    %r14
   6:	41 5f                	pop    %r15
   8:	5d                   	pop    %rbp
   9:	c3                   	ret
   a:	48 c7 c7 42 d0 de 8b 	mov    $0xffffffff8bded042,%rdi
  11:	eb 0a                	jmp    0x1d
  13:	48 c7 c7 5d e4 c4 8b 	mov    $0xffffffff8bc4e45d,%rdi
  1a:	48 89 de             	mov    %rbx,%rsi
  1d:	e8 28 52 f3 07       	call   0x7f3524a
  22:	31 ed                	xor    %ebp,%ebp
  24:	eb d7                	jmp    0xfffffffd
  26:	00 00                	add    %al,(%rax)
  28:	cc                   	int3
  29:	cc                   	int3
* 2a:	89 f6                	mov    %esi,%esi <-- trapping instruction
  2c:	48 8b 0c 24          	mov    (%rsp),%rcx
  30:	31 d2                	xor    %edx,%edx
  32:	e9 43 ef ff ff       	jmp    0xffffef7a
  37:	0f 1f 00             	nopl   (%rax)
  3a:	89 f6                	mov    %esi,%esi
  3c:	48 8b 0c 24          	mov    (%rsp),%rcx