[PATCH] Fix libmount build under uClibc

Taken from gentoo-hardened:
http://git.overlays.gentoo.org/gitweb/?p=proj/hardened-dev.git;a=commit;h=91879751

For details, see https://bugs.gentoo.org/show_bug.cgi?id=406303

Signed-off-by: Peter Korsgaard <jacmet@sunsite.dk>
diff -Naur util-linux-2.20.1.orig/libmount/src/tab_parse.c util-linux-2.20.1/libmount/src/tab_parse.c
--- util-linux-2.20.1.orig/libmount/src/tab_parse.c	2011-12-12 20:51:06.646614964 -0500
+++ util-linux-2.20.1/libmount/src/tab_parse.c	2011-12-12 21:02:03.587865010 -0500
@@ -51,19 +51,21 @@
  */
 static int mnt_parse_table_line(struct libmnt_fs *fs, char *s)
 {
-	int rc, n = 0;
-	char *src, *fstype, *optstr;
-
-	rc = sscanf(s,	UL_SCNsA" "	/* (1) source */
-			UL_SCNsA" "	/* (2) target */
-			UL_SCNsA" "	/* (3) FS type */
-			UL_SCNsA" "	/* (4) options */
+	int rc, n = 0, len = strlen (s) + 1;
+	char *src     = malloc (sizeof *src * len);
+  char *fstype  = malloc (sizeof *fstype * len);
+  char *optstr  = malloc (sizeof *optstr * len);
+
+	rc = sscanf(s,	"%s"" "	/* (1) source */
+			"%s"" "	/* (2) target */
+			"%s"" "	/* (3) FS type */
+			"%s"" "	/* (4) options */
 			"%n",		/* byte count */
 
-			&src,
-			&fs->target,
-			&fstype,
-			&optstr,
+			src,
+			fs->target,
+			fstype,
+			optstr,
 			&n);
 
 	if (rc == 4) {
@@ -108,16 +110,20 @@
  */
 static int mnt_parse_mountinfo_line(struct libmnt_fs *fs, char *s)
 {
-	int rc, end = 0;
+	int rc, end = 0, len = strlen (s) + 1;
 	unsigned int maj, min;
 	char *fstype, *src, *p;
 
+  fs->root        = malloc (sizeof *fs->root * len);
+  fs->target      = malloc (sizeof *fs->target * len);
+  fs->vfs_optstr  = malloc (sizeof *fs->vfs_optstr * len);
+
 	rc = sscanf(s,	"%u "		/* (1) id */
 			"%u "		/* (2) parent */
 			"%u:%u "	/* (3) maj:min */
-			UL_SCNsA" "	/* (4) mountroot */
-			UL_SCNsA" "	/* (5) target */
-			UL_SCNsA	/* (6) vfs options (fs-independent) */
+			"%s"" "	/* (4) mountroot */
+			"%s"" "	/* (5) target */
+			"%s"	/* (6) vfs options (fs-independent) */
 			"%n",		/* number of read bytes */
 
 			&fs->id,
@@ -139,9 +145,14 @@
 	}
 	s = p + 3;
 
-	rc += sscanf(s,	UL_SCNsA" "	/* (8) FS type */
-			UL_SCNsA" "	/* (9) source */
-			UL_SCNsA,	/* (10) fs options (fs specific) */
+  len           = strlen (s) + 1;
+	fstype        = malloc (sizeof *fstype * len);
+  src           = malloc (sizeof *src * len);
+  fs->fs_optstr = malloc (sizeof *fs->fs_optstr * len);
+
+	rc += sscanf(s,	"%s"" "	/* (8) FS type */
+			"%s"" "	/* (9) source */
+			"%s",	/* (10) fs options (fs specific) */
 
 			&fstype,
 			&src,