From: Florian Zumbiehl <florz@florz.de>
Date: Sat, 29 Aug 2009 14:25:47 +0000 (+0200)
Subject: util_lookup_group(): fix memory leak if realloc() fails
X-Git-Tag: 174~808
X-Git-Url: https://www.chiark.greenend.org.uk/ucgi/~ianmdlvl/git?p=elogind.git;a=commitdiff_plain;h=72c0373f795a5c326e6bd0f7469601f492124d70

util_lookup_group(): fix memory leak if realloc() fails
---

diff --git a/libudev/libudev-util-private.c b/libudev/libudev-util-private.c
index 5b5ecb1f5..b33ee79d6 100644
--- a/libudev/libudev-util-private.c
+++ b/libudev/libudev-util-private.c
@@ -154,9 +154,12 @@ gid_t util_lookup_group(struct udev *udev, const char *group)
 	buf = NULL;
 	gid = 0;
 	for (;;) {
-		buf = realloc(buf, buflen);
-		if (!buf)
+		char *newbuf;
+
+		newbuf = realloc(buf, buflen);
+		if (!newbuf)
 			break;
+		buf = newbuf;
 		errno = getgrnam_r(group, &grbuf, buf, buflen, &gr);
 		if (gr != NULL) {
 			gid = gr->gr_gid;