diff --git a/crypto/algif_skcipher.c b/crypto/algif_skcipher.c
index 1e61fe6e24b9..291dbd698932 100644
--- a/crypto/algif_skcipher.c
+++ b/crypto/algif_skcipher.c
@@ -135,12 +135,16 @@ static int _skcipher_recvmsg(struct socket *sock, struct msghdr *msg,
 	 * full block size buffers.
 	 */
 	if (ctx->more || len < ctx->used) {
-		if (len < bs) {
+		size_t excess = len % bs;
+
+		len -= excess;
+		iov_iter_revert(&msg->msg_iter, excess);
+
+		if (!len) {
 			err = -EINVAL;
 			goto free;
 		}
 
-		len -= len % bs;
 		cflags |= CRYPTO_SKCIPHER_REQ_NOTFINAL;
 	}