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FST: Do not replace previous attachment

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hapd->iface->fst must not be overridden if it is already pointing to FST
instance. Without this, duplicated FST-ATTACH could result in memory
leak and process termination.

Signed-off-by: Jouni Malinen <j@w1.fi>
This commit is contained in:
Jouni Malinen 2015-07-25 19:52:27 +03:00
parent ceb8a79c33
commit ff7a4bd13f
1 changed files with 4 additions and 0 deletions
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4
hostapd/ctrl_iface.c
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@ -2578,6 +2578,10 @@ hostapd_global_ctrl_iface_fst_attach(struct hapd_interfaces *interfaces,
if (!fst_parse_attach_command(cmd, ifname, sizeof(ifname), &cfg)) {
hapd = hostapd_get_iface(interfaces, ifname);
if (hapd) {
if (hapd->iface->fst) {
wpa_printf(MSG_INFO, "FST: Already attached");
return -1;
}
fst_hostapd_fill_iface_obj(hapd, &iface_obj);
hapd->iface->fst = fst_attach(ifname, hapd->own_addr,
&iface_obj, &cfg);