crypto: amlogic - fix two resources leak

This patch fixes two resources leak that occur on error path.

Reported-by: coverity-bot <keescook+coverity-bot@chromium.org>
Addresses-Coverity-ID: 1487403 ("RESOURCE_LEAK")
Addresses-Coverity-ID: 1487401 ("Resource leaks")
Fixes: 48fe583fe5 ("crypto: amlogic - Add crypto accelerator for amlogic GXL")
Signed-off-by: Corentin Labbe <clabbe@baylibre.com>
Reviewed-by: Kees Cook <keescook@chromium.org>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>

drivers/crypto/amlogic/amlogic-gxl-cipher.c

@@ -131,7 +131,8 @@ static int meson_cipher(struct skcipher_request *areq)
 	if (areq->iv && ivsize > 0) {
 		if (ivsize > areq->cryptlen) {
 			dev_err(mc->dev, "invalid ivsize=%d vs len=%d\n", ivsize, areq->cryptlen);
-			return -EINVAL;
+			err = -EINVAL;
+			goto theend;
 		}
 		memcpy(bkeyiv + 32, areq->iv, ivsize);
 		keyivlen = 48;
@@ -151,9 +152,10 @@ static int meson_cipher(struct skcipher_request *areq)
 
 	phykeyiv = dma_map_single(mc->dev, bkeyiv, keyivlen,
 				  DMA_TO_DEVICE);
-	if (dma_mapping_error(mc->dev, phykeyiv)) {
+	err = dma_mapping_error(mc->dev, phykeyiv);
+	if (err) {
 		dev_err(mc->dev, "Cannot DMA MAP KEY IV\n");
-		return -EFAULT;
+		goto theend;
 	}
 
 	tloffset = 0;
@@ -245,7 +247,6 @@ static int meson_cipher(struct skcipher_request *areq)
 	if (areq->iv && ivsize > 0) {
 		if (rctx->op_dir == MESON_DECRYPT) {
 			memcpy(areq->iv, backup_iv, ivsize);
-			kzfree(backup_iv);
 		} else {
 			scatterwalk_map_and_copy(areq->iv, areq->dst,
 						 areq->cryptlen - ivsize,
@@ -254,6 +255,7 @@ static int meson_cipher(struct skcipher_request *areq)
 	}
 theend:
 	kzfree(bkeyiv);
+	kzfree(backup_iv);
 
 	return err;
 }