From b9db4d7061a08bf82a25222074065cce71973d0c Mon Sep 17 00:00:00 2001
From: =?utf8?q?David=20H=C3=A4rdeman?= <david@hardeman.nu>
Date: Sun, 23 Nov 2025 15:12:01 +0100
Subject: [PATCH] dhcpv6: handle realloc failure
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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>
---
 src/dhcpv6-ia.c | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

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;
 
-- 
2.30.2