In the Linux kernel, the following vulnerability has been resolved:

wifi: mwifiex: Fix memcpy() field-spanning write warning in mwifiex_config_scan()

Replace one-element array with a flexible-array member in `struct
mwifiex_ie_types_wildcard_ssid_params` to fix the following warning
on a MT8173 Chromebook (mt8173-elm-hana):

[  356.775250] ------------[ cut here ]------------
[  356.784543] memcpy: detected field-spanning write (size 6) of single field "wildcard_ssid_tlv->ssid" at drivers/net/wireless/marvell/mwifiex/scan.c:904 (size 1)
[  356.813403] WARNING: CPU: 3 PID: 742 at drivers/net/wireless/marvell/mwifiex/scan.c:904 mwifiex_scan_networks+0x4fc/0xf28 [mwifiex]

The "(size 6)" above is exactly the length of the SSID of the network
this device was connected to. The source of the warning looks like:

    ssid_len = user_scan_in->ssid_list[i].ssid_len;
    [...]
    memcpy(wildcard_ssid_tlv->ssid,
           user_scan_in->ssid_list[i].ssid, ssid_len);

There is a #define WILDCARD_SSID_TLV_MAX_SIZE that uses sizeof() on this
struct, but it already didn't account for the size of the one-element
array, so it doesn't need to be changed.

https://git.kernel.org/stable/c/1de0ca1d7320a645ba2ee5954f64be08935b002a

https://git.kernel.org/stable/c/581261b2d6fdb4237b24fa13f5a5f87bf2861f2c

https://git.kernel.org/stable/c/5fa329c44e1e635da2541eab28b6cdb8464fc8d1

https://git.kernel.org/stable/c/a09760c513ae0f98c7082a1deace7fb6284ee866

https://git.kernel.org/stable/c/b466746cfb6be43f9a1457bbee52ade397fb23ea

https://git.kernel.org/stable/c/c4698ef8c42e02782604bf4f8a489dbf6b0c1365

https://git.kernel.org/stable/c/d241a139c2e9f8a479f25c75ebd5391e6a448500

https://git.kernel.org/stable/c/d7774910c5583e61c5fe2571280366624ef48036

https://git.kernel.org/stable/c/e2de22e4b6213371d9e76f74a10ce817572a8d74