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WNM: Fix time_zone advertisement without time_zone configuration

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If time_advertisement=2 is included in hostapd configuration, but
time_zone is unset, the previous implementation tried to write the Time
Zone element into management frames. This resulted in segmentation fault
when trying to dereference a NULL pointer. Fix that by skipping addition
of this element when time_zone parameter is not set.

Signed-off-by: Markus Theil <markus.theil@tu-ilmenau.de>
This commit is contained in:
Markus Theil 2018-05-28 22:26:46 +02:00 committed by Jouni Malinen
parent 0928b62944
commit b375b04b67
1 changed files with 1 additions and 1 deletions
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2
src/ap/ieee802_11_shared.c
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@ -446,7 +446,7 @@ u8 * hostapd_eid_time_zone(struct hostapd_data *hapd, u8 *eid)
{ {
size_t len; size_t len;
if (hapd->conf->time_advertisement != 2) if (hapd->conf->time_advertisement != 2 || !hapd->conf->time_zone)
return eid; return eid;
len = os_strlen(hapd->conf->time_zone); len = os_strlen(hapd->conf->time_zone);