TOMOYO: Fix wrong domainname validation.

In tomoyo_correct_domain() since 2.6.36, TOMOYO was by error validating
"<kernel>" + "/foo/\" + "/bar" when "<kernel> /foo/\* /bar" was given.
As a result, legal domainnames like "<kernel> /foo/\* /bar" are rejected.
Reported-by: NHayama Yossihiro <yossi@yedo.src.co.jp>
Signed-off-by: NTetsuo Handa <penguin-kernel@I-love.SAKURA.ne.jp>
Signed-off-by: NJames Morris <jmorris@namei.org>

security/tomoyo/util.c

@@ -390,7 +390,7 @@ bool tomoyo_correct_domain(const unsigned char *domainname)
 		if (!cp)
 			break;
 		if (*domainname != '/' ||
-		    !tomoyo_correct_word2(domainname, cp - domainname - 1))
+		    !tomoyo_correct_word2(domainname, cp - domainname))
 			goto out;
 		domainname = cp + 1;
 	}