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BUG: KASAN: global-out-of-bounds in get_unaligned_be64 include/linux/unaligned.h:58 [inline]
BUG: KASAN: global-out-of-bounds in ieee802154_be64_to_le64 include/net/mac802154.h:363 [inline]
BUG: KASAN: global-out-of-bounds in mac802154_header_create+0x7d6/0x970 net/mac802154/iface.c:448
Read of size 8 at addr ffffffff8cbf2a67 by task dhcpcd/5502

CPU: 1 UID: 0 PID: 5502 Comm: dhcpcd Not tainted 6.14.0-rc2-syzkaller-00158-g071ed42cff4f #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 12/27/2024
Call Trace:
 <TASK>
 __dump_stack lib/dump_stack.c:94 [inline]
 dump_stack_lvl+0x241/0x360 lib/dump_stack.c:120
 print_address_description mm/kasan/report.c:378 [inline]
 print_report+0x169/0x550 mm/kasan/report.c:489
 kasan_report+0x143/0x180 mm/kasan/report.c:602
 get_unaligned_be64 include/linux/unaligned.h:58 [inline]
 ieee802154_be64_to_le64 include/net/mac802154.h:363 [inline]
 mac802154_header_create+0x7d6/0x970 net/mac802154/iface.c:448
 dev_hard_header include/linux/netdevice.h:3363 [inline]
 vlan_dev_hard_header+0x359/0x480 net/8021q/vlan_dev.c:83
 dev_hard_header include/linux/netdevice.h:3363 [inline]
 lapbeth_data_transmit+0x215/0x2d0 drivers/net/wan/lapbether.c:257
 lapb_data_transmit+0x91/0xb0 net/lapb/lapb_iface.c:447
 lapb_transmit_buffer+0x168/0x1f0 net/lapb/lapb_out.c:149
 lapb_establish_data_link+0x84/0xd0
 lapb_device_event+0x4e0/0x670
 notifier_call_chain+0x1a5/0x3f0 kernel/notifier.c:85
 __dev_notify_flags+0x207/0x400
 dev_change_flags+0xf0/0x1a0 net/core/dev.c:9249
 devinet_ioctl+0xea2/0x1d80 net/ipv4/devinet.c:1208
 inet_ioctl+0x3d7/0x4f0 net/ipv4/af_inet.c:1001
 sock_do_ioctl+0x158/0x460 net/socket.c:1199
 sock_ioctl+0x626/0x8e0 net/socket.c:1318
 vfs_ioctl fs/ioctl.c:51 [inline]
 __do_sys_ioctl fs/ioctl.c:906 [inline]
 __se_sys_ioctl+0xf5/0x170 fs/ioctl.c:892
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fa1bce5ad49
Code: 5c c3 48 8d 44 24 08 48 89 54 24 e0 48 89 44 24 c0 48 8d 44 24 d0 48 89 44 24 c8 b8 10 00 00 00 c7 44 24 b8 10 00 00 00 0f 05 <41> 89 c0 3d 00 f0 ff ff 76 10 48 8b 15 ae 60 0d 00 f7 d8 41 83 c8
RSP: 002b:00007ffeabc017a8 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007fa1bcd8c6c0 RCX: 00007fa1bce5ad49
RDX: 00007ffeabc11998 RSI: 0000000000008914 RDI: 0000000000000011
RBP: 00007ffeabc21b58 R08: 00007ffeabc11958 R09: 00007ffeabc11908
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007ffeabc11998 R14: 0000000000000028 R15: 0000000000008914
 </TASK>

The buggy address belongs to the variable:
 bcast_addr+0x7/0x20

The buggy address belongs to the physical page:
page: refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xcbf2
flags: 0xfff00000002000(reserved|node=0|zone=1|lastcpupid=0x7ff)
raw: 00fff00000002000 ffffea000032fc88 ffffea000032fc88 0000000000000000
raw: 0000000000000000 0000000000000000 00000001ffffffff 0000000000000000
page dumped because: kasan: bad access detected
page_owner info is not present (never set?)

Memory state around the buggy address:
 ffffffff8cbf2900: f9 f9 f9 f9 f9 f9 f9 f9 f9 f9 f9 f9 f9 f9 f9 f9
 ffffffff8cbf2980: f9 f9 f9 f9 00 00 00 00 00 00 f9 f9 f9 f9 f9 f9
>ffffffff8cbf2a00: 00 00 00 00 06 f9 f9 f9 f9 f9 f9 f9 06 f9 f9 f9
                                                       ^
 ffffffff8cbf2a80: 00 00 00 00 00 f9 f9 f9 f9 f9 f9 f9 00 00 00 00
 ffffffff8cbf2b00: 00 05 f9 f9 f9 f9 f9 f9 00 00 00 00 00 06 f9 f9
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