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From: David Chisnall <theraven@FreeBSD.org>
Date: Mon, 11 Jun 2012 14:02:03 +0000 (UTC)
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Subject: svn commit: r236889 - head/lib/libc/locale
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Author: theraven
Date: Mon Jun 11 14:02:02 2012
New Revision: 236889
URL: http://svn.freebsd.org/changeset/base/236889

Log:
  Fix a leak when setting the global character locale to "C" from something else.
  
  Reported by:	mm

Modified:
  head/lib/libc/locale/setrunelocale.c

Modified: head/lib/libc/locale/setrunelocale.c
==============================================================================
--- head/lib/libc/locale/setrunelocale.c	Mon Jun 11 13:17:45 2012	(r236888)
+++ head/lib/libc/locale/setrunelocale.c	Mon Jun 11 14:02:02 2012	(r236889)
@@ -89,6 +89,17 @@ const _RuneLocale *__getCurrentRuneLocal
 	return XLOCALE_CTYPE(__get_locale())->runes;
 }
 
+static void free_runes(_RuneLocale *rl)
+{
+	/* FIXME: The "EUC" check here is a hideous abstraction violation. */
+	if ((rl != &_DefaultRuneLocale) && (rl)) {
+		if (strcmp(rl->__encoding, "EUC") == 0) {
+			free(rl->__variable);
+		}
+		free(rl);
+	}
+}
+
 static int
 __setrunelocale(struct xlocale_ctype *l, const char *encoding)
 {
@@ -102,6 +113,7 @@ __setrunelocale(struct xlocale_ctype *l,
 	 * The "C" and "POSIX" locale are always here.
 	 */
 	if (strcmp(encoding, "C") == 0 || strcmp(encoding, "POSIX") == 0) {
+		free_runes(saved.runes);
 		(void) _none_init(l, (_RuneLocale*)&_DefaultRuneLocale);
 		return (0);
 	}
@@ -153,13 +165,7 @@ __setrunelocale(struct xlocale_ctype *l,
 
 	if (ret == 0) {
 		/* Free the old runes if it exists. */
-		/* FIXME: The "EUC" check here is a hideous abstraction violation. */
-		if ((saved.runes != &_DefaultRuneLocale) && (saved.runes)) {
-			if (strcmp(saved.runes->__encoding, "EUC") == 0) {
-				free(saved.runes->__variable);
-			}
-			free(saved.runes);
-		}
+		free_runes(saved.runes);
 	} else {
 		/* Restore the saved version if this failed. */
 		memcpy(l, &saved, sizeof(struct xlocale_ctype));