1 files changed, 3 insertions, 2 deletions
diff --git a/coreutils/stty.c b/coreutils/stty.c
index 3ce8bf312..4e665bcb7 100644
--- a/coreutils/stty.c
+++ b/coreutils/stty.c
@@ -462,8 +462,9 @@ static void wrapf(const char *message, ...)
        va_start(args, message);
        buflen = vsnprintf(buf, sizeof(buf), message, args);
        va_end(args);
-        /* buflen = strlen(buf); cheaper not to pull in strlen */
+        /* We seem to be called only with suitable lengths, but check if
-        if (!buflen /*|| buflen >= sizeof(buf)*/) return;
+           somebody failed to adhere to this assumption just to be sure.  */
+        if (!buflen || buflen >= sizeof(buf)) return;
        if (current_col > 0) {
                current_col++;