From: Felix Fietkau <nbd@openwrt.org>
Date: Sun, 4 Dec 2011 19:07:02 +0000 (+0100)
Subject: fix use-after-free on config reload
X-Git-Url: https://git.librecmc.org/?a=commitdiff_plain;h=581c0d568f6fa7348a164077d761a04d0bb2b4e8;p=oweals%2Fnetifd.git

fix use-after-free on config reload
---

diff --git a/config.c b/config.c
index fcfea7c..8472d44 100644
--- a/config.c
+++ b/config.c
@@ -176,6 +176,14 @@ config_parse_interface(struct uci_section *s)
 	memcpy(config, b.head, blob_pad_len(b.head));
 	interface_add(iface, config);
 
+	/*
+	 * need to look up the interface name again, in case of config update,
+	 * the pointer will have changed
+	 */
+	iface = vlist_find(&interfaces, s->e.name, iface, node);
+	if (!iface)
+		return;
+
 	dev = iface->main_dev.dev;
 	if (!dev || !dev->default_config)
 		return;