X-Git-Url: http://pilppa.org/gitweb/gitweb.cgi?a=blobdiff_plain;f=lib%2Ftextsearch.c;h=be8bda3862f5f34595dcdbeb6284e30071ef7409;hb=63eae0ccacd67fd5ee238c6ba68f83f0ab91a1df;hp=88c98a2ec8d93efd79b230ca98feed8658f406a4;hpb=0ce3c83a9c22f59937b86c80b478dfbffe54dbab;p=linux-2.6-omap-h63xx.git

diff --git a/lib/textsearch.c b/lib/textsearch.c
index 88c98a2ec8d..be8bda3862f 100644
--- a/lib/textsearch.c
+++ b/lib/textsearch.c
@@ -7,7 +7,7 @@
  *		2 of the License, or (at your option) any later version.
  *
  * Authors:	Thomas Graf <tgraf@suug.ch>
- * 		Pablo Neira Ayuso <pablo@eurodev.net>
+ * 		Pablo Neira Ayuso <pablo@netfilter.org>
  *
  * ==========================================================================
  *
@@ -250,7 +250,8 @@ unsigned int textsearch_find_continuous(struct ts_config *conf,
  *       the various search algorithms.
  *
  * Returns a new textsearch configuration according to the specified
- *         parameters or a ERR_PTR().
+ * parameters or a ERR_PTR(). If a zero length pattern is passed, this
+ * function returns EINVAL.
  */
 struct ts_config *textsearch_prepare(const char *algo, const void *pattern,
 				     unsigned int len, gfp_t gfp_mask, int flags)
@@ -259,6 +260,9 @@ struct ts_config *textsearch_prepare(const char *algo, const void *pattern,
 	struct ts_config *conf;
 	struct ts_ops *ops;
 	
+	if (len == 0)
+		return ERR_PTR(-EINVAL);
+
 	ops = lookup_ts_algo(algo);
 #ifdef CONFIG_KMOD
 	/*