Fix off-by-one check that can lead to a memory overflow in ecpg.

Patch by Liu Huailing <liuhuailing@cn.fujitsu.com>

diff --git a/src/interfaces/ecpg/preproc/pgc.l b/src/interfaces/ecpg/preproc/pgc.l
index deb1e554ce9326453960019862c8a0d1d03dbaa3..c3670b94d75790514b50d55ca314f1dc9dfec733 100644 (file)
--- a/src/interfaces/ecpg/preproc/pgc.l
+++ b/src/interfaces/ecpg/preproc/pgc.l
@@ -1411,7 +1411,7 @@ parse_include(void)
 
                for (ip = include_paths; yyin == NULL && ip != NULL; ip = ip->next)
                {
-                       if (strlen(ip->path) + strlen(yytext) + 3 > MAXPGPATH)
+                       if (strlen(ip->path) + strlen(yytext) + 4 > MAXPGPATH)
                        {
                                fprintf(stderr, _("Error: include path \"%s/%s\" is too long on line %d, skipping\n"), ip->path, yytext, yylineno);
                                continue;