2012-02-26  Paul Smith  <psmith@gnu.org>

	* implicit.c (pattern_search): Check the stem length to avoid

	stack overflows in stem_str.  Fixes Savannah bug #35525.

--- a/implicit.c

+++ b/implicit.c

@@ -488,6 +488,13 @@ pattern_search (struct file *file, int archive,

               dir = pathdir;

             }

+          if (stemlen > GET_PATH_MAX)

+            {

+              DBS (DB_IMPLICIT, (_("Stem too long: `%.*s'.\n"),

+                                 (int) stemlen, stem));

+              continue;

+            }

+

           DBS (DB_IMPLICIT, (_("Trying pattern rule with stem `%.*s'.\n"),

                              (int) stemlen, stem));