diff --git a/drivers/md/dm-crypt.c b/drivers/md/dm-crypt.c
index 3bdbb6115702500498548c1936c9fe19510aa414..a8aab9cf26b9489baaaac34de5bb0081e05faba4 100644
--- a/drivers/md/dm-crypt.c
+++ b/drivers/md/dm-crypt.c
@@ -1168,12 +1168,11 @@ static int crypt_ctr(struct dm_target *ti, unsigned int argc, char **argv)
 	if (ivmode && cc->iv_gen_ops) {
 		if (ivopts)
 			*(ivopts - 1) = ':';
-		cc->iv_mode = kmalloc(strlen(ivmode) + 1, GFP_KERNEL);
+		cc->iv_mode = kstrdup(ivmode, GFP_KERNEL);
 		if (!cc->iv_mode) {
 			ti->error = "Error kmallocing iv_mode string";
 			goto bad_ivmode_string;
 		}
-		strcpy(cc->iv_mode, ivmode);
 	} else
 		cc->iv_mode = NULL;