net: consider option-length when parsing NIS domain
When parsing option 40 (network information service domain) the
option length is in variable 'oplen' and not in 'size'.
Addresses-Coverity-ID: 492765 Uninitialized variables (UNINIT)
Fixes: 8ab388bfdbcf ("net: add support to parse the NIS domain for the dhcp options")
Signed-off-by: Heinrich Schuchardt <heinrich.schuchardt@canonical.com>
diff --git a/net/bootp.c b/net/bootp.c
index c15472f..86c5680 100644
--- a/net/bootp.c
+++ b/net/bootp.c
@@ -886,7 +886,7 @@
case 40: /* NIS Domain name */
if (net_nis_domain[0] == 0) {
size = truncate_sz("NIS Domain Name",
- sizeof(net_nis_domain), size);
+ sizeof(net_nis_domain), oplen);
memcpy(&net_nis_domain, popt + 2, size);
net_nis_domain[size] = 0;
}