dm ioctl: prefer strlcpy over strncpy

strlcpy() will always null terminate the string.

    The code should already guarantee this as the last bytes are already
    NULs and the string lengths were restricted before being stored in
    hc.  Removing the '-1' becomes necessary so strlcpy() doesn't
    lose the last character of a maximum-length string.
	- agk

Signed-off-by: Roel Kluin <roel.kluin@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Alasdair G Kergon <agk@redhat.com>

diff --git a/drivers/md/dm-ioctl.c b/drivers/md/dm-ioctl.c
index d19854c..99de0e4 100644 (file)
--- a/drivers/md/dm-ioctl.c
+++ b/drivers/md/dm-ioctl.c
@@ -645,9 +645,9 @@ static struct mapped_device *find_device(struct dm_ioctl *param)
                 * Sneakily write in both the name and the uuid
                 * while we have the cell.
                 */
-               strncpy(param->name, hc->name, sizeof(param->name));
+               strlcpy(param->name, hc->name, sizeof(param->name));
                if (hc->uuid)
-                       strncpy(param->uuid, hc->uuid, sizeof(param->uuid)-1);
+                       strlcpy(param->uuid, hc->uuid, sizeof(param->uuid));
                else
                        param->uuid[0] = '\0';