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crypto: sun8i-ss - Fix memory leak of pad 

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

Addresses-Coverity: ("Resource leak")
Fixes: d9b45418a9 ("crypto: sun8i-ss - support hash algorithms")
Signed-off-by: Colin Ian King <colin.king@canonical.com>
Acked-by: Corentin Labbe <clabbe.montjoie@gmail.com>
Tested-by: Corentin Labbe <clabbe.montjoie@gmail.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
This commit is contained in:
Colin Ian King 2021-04-01 16:18:27 +01:00 committed by Herbert Xu
parent 3d8c5f5a08
commit 50274b01ac
1 changed files with 4 additions and 3 deletions
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7
drivers/crypto/allwinner/sun8i-ss/sun8i-ss-hash.c
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@ -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;