------------[ cut here ]------------
WARNING: CPU: 0 PID: 7661 at net/mac80211/tx.c:4851 __ieee80211_beacon_update_cntdwn net/mac80211/tx.c:4851 [inline]
WARNING: CPU: 0 PID: 7661 at net/mac80211/tx.c:4851 __ieee80211_beacon_get+0x172c/0x1f80 net/mac80211/tx.c:5075
Modules linked in:
CPU: 0 PID: 7661 Comm: syz.7.786 Not tainted 5.15.185-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025
RIP: 0010:__ieee80211_beacon_update_cntdwn net/mac80211/tx.c:4851 [inline]
RIP: 0010:__ieee80211_beacon_get+0x172c/0x1f80 net/mac80211/tx.c:5075
Code: f8 0f 0b e9 f1 fa ff ff e8 b1 1a 42 f8 0f 0b 4c 8b 74 24 08 e9 36 fe ff ff e8 a0 1a 42 f8 0f 0b e9 3c ef ff ff e8 94 1a 42 f8 <0f> 0b e9 b8 f2 ff ff e8 18 c5 6b 00 44 89 e1 80 e1 07 80 c1 03 38
RSP: 0018:ffffc900000078c0 EFLAGS: 00010246
RAX: ffffffff8935a78c RBX: ffff88807e728c80 RCX: ffff888025570000
RDX: 0000000000000100 RSI: 0000000000000000 RDI: 0000000000000000
RBP: ffffc90000007ae8 R08: ffff888025570000 R09: 0000000000000003
R10: 0000000000000007 R11: 0000000000000100 R12: ffff8880634c2a00
R13: dffffc0000000000 R14: 0000000000000000 R15: 1ffff92000000f28
FS:  0000555558733500(0000) GS:ffff8880b9000000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f8229e77f98 CR3: 00000000255a8000 CR4: 00000000003526f0
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:5194
 ieee80211_beacon_get include/net/mac80211.h:4981 [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:1690 [inline]
 __hrtimer_run_queues+0x53d/0xc40 kernel/time/hrtimer.c:1754
 hrtimer_run_softirq+0x176/0x240 kernel/time/hrtimer.c:1771
 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:stack_trace_consume_entry+0x10e/0x270 kernel/stacktrace.c:94
Code: 4c 89 f8 48 c1 e8 03 80 3c 10 00 74 1a 4c 89 ff 48 89 f3 49 89 d4 4c 89 c5 e8 fe d4 56 00 49 89 e8 4c 89 e2 48 89 de 49 89 37 <41> 8b 18 41 0f b6 44 15 00 84 c0 0f 85 2f 01 00 00 41 3b 1e 0f 92
RSP: 0018:ffffc9000310f698 EFLAGS: 00000246
RAX: 1ffff92000621f0f RBX: ffffc9000310f820 RCX: 0000000080000001
RDX: dffffc0000000000 RSI: ffffffff89a1356c RDI: ffffc9000310f7a0
RBP: 1ffff92000621ef6 R08: ffffc9000310f7b0 R09: 000000000000000b
R10: fffff52000621ee9 R11: 1ffff92000621ee7 R12: 0000000000000000
R13: 1ffff92000621ef5 R14: ffffc9000310f7a8 R15: ffffc9000310f878
 arch_stack_walk+0x100/0x140 arch/x86/kernel/stacktrace.c:27
 stack_trace_save+0x98/0xe0 kernel/stacktrace.c:122
 kasan_save_stack mm/kasan/common.c:38 [inline]
 kasan_set_track+0x4b/0x70 mm/kasan/common.c:46
 kasan_set_free_info+0x1f/0x40 mm/kasan/generic.c:360
 ____kasan_slab_free+0xd5/0x110 mm/kasan/common.c:366
 kasan_slab_free include/linux/kasan.h:230 [inline]
 slab_free_hook mm/slub.c:1705 [inline]
 slab_free_freelist_hook+0xea/0x170 mm/slub.c:1731
 slab_free mm/slub.c:3499 [inline]
 kfree+0xef/0x2a0 mm/slub.c:4559
 kcov_mmap+0x89/0x120 kernel/kcov.c:498
 call_mmap include/linux/fs.h:2177 [inline]
 mmap_file+0x5d/0xb0 mm/util.c:1092
 __mmap_region mm/mmap.c:1784 [inline]
 mmap_region+0xd0d/0x15e0 mm/mmap.c:2921
 do_mmap+0x77a/0xdf0 mm/mmap.c:1574
 vm_mmap_pgoff+0x1b2/0x2b0 mm/util.c:551
 ksys_mmap_pgoff+0x542/0x780 mm/mmap.c:1623
 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: 0033:0x7f822c052963
Code: f7 d8 64 89 01 48 83 c8 ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 00 41 89 ca 41 f7 c1 ff 0f 00 00 75 14 b8 09 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 25 c3 0f 1f 40 00 48 c7 c0 a8 ff ff ff 64 c7
RSP: 002b:00007fffce5fdaf8 EFLAGS: 00000246 ORIG_RAX: 0000000000000009
RAX: ffffffffffffffda RBX: 00007f822c27a2d8 RCX: 00007f822c052963
RDX: 0000000000000003 RSI: 0000000000400000 RDI: 00007f8229a57000
RBP: 00007f822c27a240 R08: 00000000000000db R09: 0000000000000000
R10: 0000000000000011 R11: 0000000000000246 R12: 00007f822c279fa0
R13: 00007f822c27a240 R14: 000000000000001f R15: 0000000000000005
 </TASK>
----------------
Code disassembly (best guess):
   0:	4c 89 f8             	mov    %r15,%rax
   3:	48 c1 e8 03          	shr    $0x3,%rax
   7:	80 3c 10 00          	cmpb   $0x0,(%rax,%rdx,1)
   b:	74 1a                	je     0x27
   d:	4c 89 ff             	mov    %r15,%rdi
  10:	48 89 f3             	mov    %rsi,%rbx
  13:	49 89 d4             	mov    %rdx,%r12
  16:	4c 89 c5             	mov    %r8,%rbp
  19:	e8 fe d4 56 00       	call   0x56d51c
  1e:	49 89 e8             	mov    %rbp,%r8
  21:	4c 89 e2             	mov    %r12,%rdx
  24:	48 89 de             	mov    %rbx,%rsi
  27:	49 89 37             	mov    %rsi,(%r15)
* 2a:	41 8b 18             	mov    (%r8),%ebx <-- trapping instruction
  2d:	41 0f b6 44 15 00    	movzbl 0x0(%r13,%rdx,1),%eax
  33:	84 c0                	test   %al,%al
  35:	0f 85 2f 01 00 00    	jne    0x16a
  3b:	41 3b 1e             	cmp    (%r14),%ebx
  3e:	0f                   	.byte 0xf
  3f:	92                   	xchg   %eax,%edx