From: Christian Brauner <christian.brauner@ubuntu.com>
Date: Sun, 28 Mar 2021 15:54:26 +0000 (+0200)
Subject: confile: safely clean previous value in set_config_net_ipv6_gateway()
X-Git-Tag: lxc-5.0.0~232^2~11
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=e0f420d5ae0f11f5cb538c93ff4aa956202958e0;p=thirdparty%2Flxc.git

confile: safely clean previous value in set_config_net_ipv6_gateway()

Link: https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=32610
Signed-off-by: Christian Brauner <christian.brauner@ubuntu.com>
---

diff --git a/src/lxc/confile.c b/src/lxc/confile.c
index 59fc5704d..375960212 100644
--- a/src/lxc/confile.c
+++ b/src/lxc/confile.c
@@ -936,10 +936,9 @@ static int set_config_net_ipv6_gateway(const char *key, const char *value,
 	if (!netdev)
 		return ret_errno(EINVAL);
 
+	clr_config_net_ipv6_gateway(key, lxc_conf, data);
 	if (lxc_config_value_empty(value))
-		return clr_config_net_ipv6_gateway(key, lxc_conf, data);
-
-	free(netdev->ipv6_gateway);
+		return 0;
 
 	if (strequal(value, "auto")) {
 		netdev->ipv6_gateway = NULL;