From: Roy Marples <roy@marples.name>
Date: Mon, 6 Nov 2017 21:51:34 +0000 (+0000)
Subject: if-linux: fix a potential NULL de-reference
X-Git-Tag: v7.0.0-rc4~6
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=ea2f85108760c02afbf68c2e63b3d8339614f976;p=thirdparty%2Fdhcpcd.git

if-linux: fix a potential NULL de-reference
---

diff --git a/src/if-linux.c b/src/if-linux.c
index 0d49ab6b..647e1261 100644
--- a/src/if-linux.c
+++ b/src/if-linux.c
@@ -1376,8 +1376,10 @@ bpf_open(struct interface *ifp, int (*filter)(struct interface *, int))
 	return s;
 
 eexit:
-	free(state->buffer);
-	state->buffer = NULL;
+	if (state != NULL) {
+		free(state->buffer);
+		state->buffer = NULL;
+	}
 	close(s);
 	return -1;
 }