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WPS UPnP: Make dl_list_first() use easier for static analyzer

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The preceding dl_list_len() check guarantees that dl_list_first()
returns an entry and not NULL. However, that seems to be a bit too
difficult path to follow for static analyzers, so add an explicit check
for the dl_list_first() return value to be non-NULL to avoid warnings.

Signed-off-by: Jouni Malinen <j@w1.fi>
This commit is contained in:
Jouni Malinen 2014-10-11 13:43:27 +03:00
parent 6cbdb0c537
commit 3e9fa3be62
1 changed files with 6 additions and 4 deletions
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6
src/wps/wps_upnp.c
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@ -700,11 +700,13 @@ struct subscription * subscription_start(struct upnp_wps_device_sm *sm,
if (dl_list_len(&sm->subscriptions) >= MAX_SUBSCRIPTIONS) { if (dl_list_len(&sm->subscriptions) >= MAX_SUBSCRIPTIONS) {
s = dl_list_first(&sm->subscriptions, struct subscription, s = dl_list_first(&sm->subscriptions, struct subscription,
list); list);
wpa_printf(MSG_INFO, "WPS UPnP: Too many subscriptions, " if (s) {
"trashing oldest"); wpa_printf(MSG_INFO,
"WPS UPnP: Too many subscriptions, trashing oldest");
dl_list_del(&s->list); dl_list_del(&s->list);
subscription_destroy(s); subscription_destroy(s);
} }
}
s = os_zalloc(sizeof(*s)); s = os_zalloc(sizeof(*s));
if (s == NULL) if (s == NULL)