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WPS: Fix current_ssid clearing on duplicate network removal

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It was possible for the current network profile to be deleted when
merging duplicated WPS credentials. However, this did not clear
wpa_s->current_ssid and it was possible for something else to end up
dereferencing that pointer to now freed memory. This could be hit, e.g.,
with ap_wps_mixed_cred. Fix this by clearing current_ssid also in this
code path similarly to other cases of network block getting removed.

Signed-off-by: Jouni Malinen <j@w1.fi>
This commit is contained in:
Jouni Malinen 2014-11-30 15:48:37 +02:00
parent e4a35f07d9
commit 4f9a5ea5cc
1 changed files with 2 additions and 0 deletions
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2
wpa_supplicant/wps_supplicant.c
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@ -339,6 +339,8 @@ static void wpas_wps_remove_dup_network(struct wpa_supplicant *wpa_s,
/* Remove the duplicated older network entry. */ /* Remove the duplicated older network entry. */
wpa_printf(MSG_DEBUG, "Remove duplicate network %d", ssid->id); wpa_printf(MSG_DEBUG, "Remove duplicate network %d", ssid->id);
wpas_notify_network_removed(wpa_s, ssid); wpas_notify_network_removed(wpa_s, ssid);
if (wpa_s->current_ssid == ssid)
wpa_s->current_ssid = NULL;
wpa_config_remove_network(wpa_s->conf, ssid->id); wpa_config_remove_network(wpa_s->conf, ssid->id);
} }
} }