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UBSan: Avoid memcmp(ptr, NULL, 0)

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Skip the memcmp() call if ssid_len == 0 and entry->ssid might be NULL to
avoid an UBSan warning.

wpa_supplicant.c:3956:9: runtime error: null pointer passed as argument 2, which is declared to never be null

Signed-off-by: Jouni Malinen <j@w1.fi>
This commit is contained in:
Jouni Malinen 2019-02-23 13:50:47 +02:00
parent 1b85cad29c
commit c4fccfc7a5
1 changed files with 3 additions and 1 deletions
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4
wpa_supplicant/wpa_supplicant.c
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@ -3953,7 +3953,9 @@ struct wpa_ssid * wpa_supplicant_get_ssid(struct wpa_supplicant *wpa_s)
while (entry) { while (entry) {
if (!wpas_network_disabled(wpa_s, entry) && if (!wpas_network_disabled(wpa_s, entry) &&
((ssid_len == entry->ssid_len && ((ssid_len == entry->ssid_len &&
os_memcmp(ssid, entry->ssid, ssid_len) == 0) || wired) && (!entry->ssid ||
os_memcmp(ssid, entry->ssid, ssid_len) == 0)) ||
wired) &&
(!entry->bssid_set || (!entry->bssid_set ||
os_memcmp(bssid, entry->bssid, ETH_ALEN) == 0)) os_memcmp(bssid, entry->bssid, ETH_ALEN) == 0))
return entry; return entry;