hush: fix strcpy of potentially overlapping strings

diff --git a/shell/hush.c b/shell/hush.c
index bfd487cfb4e4f5d0c8f588d140d52bc17c545a65..2c4704a9cde61f6b656cde4c16595b1757ee12bf 100644 (file)
--- a/shell/hush.c
+++ b/shell/hush.c
@@ -2801,7 +2801,7 @@ static char *expand_string_to_string(const char *str)
                if (!list[0] || list[1])
                        bb_error_msg_and_die("BUG in varexp2");
        /* actually, just move string 2*sizeof(char*) bytes back */
-       strcpy((char*)list, list[0]);
+       overlapping_strcpy((char*)list, list[0]);
        debug_printf_expand("string_to_string='%s'\n", (char*)list);
        return (char*)list;
 }
@@ -2823,7 +2823,7 @@ static char* expand_strvec_to_string(char **argv)
                        n++;
                }
        }
-       strcpy((char*)list, list[0]);
+       overlapping_strcpy((char*)list, list[0]);
        debug_printf_expand("strvec_to_string='%s'\n", (char*)list);
        return (char*)list;
 }