rsync: fix of-by-one in check of snprintf() result.

Fixes bug 11229.

diff --git a/io.c b/io.c
index a868fa9caa4307e839821f1e84de1bab2a3bdcd8..01c6db179e0d38784c2412da83ebb15b7f9af23b 100644 (file)
--- a/io.c
+++ b/io.c
@@ -2283,7 +2283,7 @@ void io_printf(int fd, const char *format, ...)
        if (len < 0)
                exit_cleanup(RERR_PROTOCOL);
 
-       if (len > (int)sizeof buf) {
+       if (len >= (int)sizeof buf) {
                rprintf(FERROR, "io_printf() was too long for the buffer.\n");
                exit_cleanup(RERR_PROTOCOL);
        }