diskutil: fix potential out-of-bounds array write

[fio.git] / diskutil.c

diff --git a/diskutil.c b/diskutil.c
index 9aa1fa15acab9ed27d0925e2926816bd8478d90e..cbde42e908f71629cd9575e783fb4d390554f369 100644 (file)
--- a/diskutil.c
+++ b/diskutil.c
@@ -236,7 +236,7 @@ static void find_add_disk_slaves(struct thread_data *td, char *path,
                 * are links to the real directories for the slave
                 * devices?
                 */
-               linklen = readlink(temppath, slavepath, PATH_MAX - 0);
+               linklen = readlink(temppath, slavepath, PATH_MAX - 1);
                if (linklen  < 0) {
                        perror("readlink() for slave device.");
                        return;