Obviously this is a very old patch, but I was just looking at users of cfg80211_find_vendor_ie() and realized you have a bug here: > + vendor_ie = cfg80211_find_vendor_ie(WLAN_OUI_MICROSOFT, > + WLAN_OUI_TYPE_MICROSOFT_ > WMM, > + params->beacon.tail, > + params- > >beacon.tail_len); > + if (vendor_ie) { > + wmm_ie = (struct ieee_types_header *)vendor_ie; > + memcpy(&bss_cfg->wmm_info, wmm_ie + 1, > + sizeof(bss_cfg->wmm_info)); > + priv->wmm_enabled = 1; You need to check that the vendor_ie is actually long enough. johannes