[PATCH][next] crypto: sun8i-ss: Fix memory leak of pad

[Colin King]

From: Colin Ian King <colin.k...@canonical.com>

It appears there are several failure return paths that don't seem
to be free'ing pad. Fix these.

Addresses-Coverity: ("Resource leak")
Fixes: d9b45418a917 ("crypto: sun8i-ss - support hash algorithms")
Signed-off-by: Colin Ian King <colin.k...@canonical.com>
---
 drivers/crypto/allwinner/sun8i-ss/sun8i-ss-hash.c | 7 ++++---
 1 file changed, 4 insertions(+), 3 deletions(-)

diff --git a/drivers/crypto/allwinner/sun8i-ss/sun8i-ss-hash.c 
b/drivers/crypto/allwinner/sun8i-ss/sun8i-ss-hash.c
index 7d1fc9aba665..3c073eb3db03 100644
--- a/drivers/crypto/allwinner/sun8i-ss/sun8i-ss-hash.c
+++ b/drivers/crypto/allwinner/sun8i-ss/sun8i-ss-hash.c
@@ -348,8 +348,10 @@ int sun8i_ss_hash_run(struct crypto_engine *engine, void 
*breq)
        bf = (__le32 *)pad;
 
        result = kzalloc(digestsize, GFP_KERNEL | GFP_DMA);
-       if (!result)
+       if (!result) {
+               kfree(pad);
                return -ENOMEM;
+       }
 
        for (i = 0; i < MAX_SG; i++) {
                rctx->t_dst[i].addr = 0;
@@ -436,10 +438,9 @@ int sun8i_ss_hash_run(struct crypto_engine *engine, void 
*breq)
                     DMA_TO_DEVICE);
        dma_unmap_single(ss->dev, addr_res, digestsize, DMA_FROM_DEVICE);
 
-       kfree(pad);
-
        memcpy(areq->result, result, algt->alg.hash.halg.digestsize);
 theend:
+       kfree(pad);
        kfree(result);
        crypto_finalize_hash_request(engine, breq, err);
        return 0;
-- 
2.30.2