From: David Härdeman <david@hardeman.nu>
Date: Sun, 23 Nov 2025 14:12:01 +0000 (+0100)
Subject: dhcpv6: handle realloc failure
X-Git-Url: http://git.openwrt.org/?a=commitdiff_plain;h=b9db4d7061a08bf82a25222074065cce71973d0c;p=project%2Fodhcpd.git

dhcpv6: handle realloc failure

Another realloc failure case.

Signed-off-by: David Härdeman <david@hardeman.nu>
Link: https://github.com/openwrt/odhcpd/pull/320
Signed-off-by: Álvaro Fernández Rojas <noltari@gmail.com>
---

diff --git a/src/dhcpv6-ia.c b/src/dhcpv6-ia.c
index b884f9a..32b652d 100644
--- a/src/dhcpv6-ia.c
+++ b/src/dhcpv6-ia.c
@@ -1236,8 +1236,9 @@ proceed:
 				    hdr->msg_type == DHCPV6_MSG_REQUEST ||
 				    hdr->msg_type == DHCPV6_MSG_REBIND)) {
 				if ((!(a->flags & OAF_STATIC) || !a->hostname) && hostname_len > 0) {
-					a->hostname = realloc(a->hostname, hostname_len + 1);
-					if (a->hostname) {
+					char *hostname = realloc(a->hostname, hostname_len + 1);
+					if (hostname) {
+						a->hostname = hostname;
 						memcpy(a->hostname, hostname, hostname_len);
 						a->hostname[hostname_len] = 0;