diff --git a/drivers/staging/lustre/lustre/llite/dir.c b/drivers/staging/lustre/lustre/llite/dir.c
index d10d27268323..80d44ca9516a 100644
--- a/drivers/staging/lustre/lustre/llite/dir.c
+++ b/drivers/staging/lustre/lustre/llite/dir.c
@@ -1185,6 +1185,8 @@ static long ll_dir_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
 		if (lumv1->lmm_magic == LOV_USER_MAGIC_V3) {
 			if (copy_from_user(&lumv3, lumv3p, sizeof(lumv3)))
 				return -EFAULT;
+			if (lumv3.lmm_magic != LOV_USER_MAGIC_V3)
+				return -EINVAL;
 		}
 
 		if (is_root_inode(inode))