We need to cap "ssidlen" to prevent a memcpy() overflow.
Fixes:
40115bbc40e2 ("staging: wfx: implement the rest of mac80211 API")
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Reviewed-by: Jérôme Pouiller <jerome.pouiller@silabs.com>
Link: https://lore.kernel.org/r/20200424104235.GA416402@mwanda
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
ssidie = ieee80211_bss_get_ie(bss, WLAN_EID_SSID);
if (ssidie) {
ssidlen = ssidie[1];
- memcpy(ssid, &ssidie[2], ssidie[1]);
+ if (ssidlen > IEEE80211_MAX_SSID_LEN)
+ ssidlen = IEEE80211_MAX_SSID_LEN;
+ memcpy(ssid, &ssidie[2], ssidlen);
}
rcu_read_unlock();