[PATCH] Do not overflow string buffer (PR objc/85476).

[Martin Liška]

Hi.

Quite obvious package that causes an ASAN error described in the PR.

Patch can bootstrap on ppc64le-redhat-linux and survives regression tests.

Ready to be installed?
Martin

gcc/objc/ChangeLog:

2018-04-20  Martin Liska  <mli...@suse.cz>

        PR objc/85476
        * objc-act.c (finish_class): Do not overflow string buffer.
---
 gcc/objc/objc-act.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)



diff --git a/gcc/objc/objc-act.c b/gcc/objc/objc-act.c
index b87f7cc075e..d08693051ea 100644
--- a/gcc/objc/objc-act.c
+++ b/gcc/objc/objc-act.c
@@ -8003,7 +8003,7 @@ finish_class (tree klass)
 		    char *setter_name = (char *) alloca (length);
 		    tree ret_type, selector, arg_type, arg_name;
 
-		    strcpy (setter_name, full_setter_name);
+		    memcpy (setter_name, full_setter_name, length - 1);
 		    setter_name[length - 1] = '\0';
 		    ret_type = build_tree_list (NULL_TREE, void_type_node);
 		    arg_type = build_tree_list (NULL_TREE, TREE_TYPE (x));