crypto: caam - fix mem leak in ahash_setkey

In case hash key is bigger than algorithm block size, it is hashed.
In this case, memory is allocated to keep this hash in hashed_key.
hashed_key has to be freed on the key_dma dma mapping error path.

Signed-off-by: Horia Geanta <horia.geanta@freescale.com>
Reviewed-by: Marek Vasut <marex@denx.de>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>

1 files changed, 3 insertions, 1 deletions

diff --git a/drivers/crypto/caam/caamhash.c b/drivers/crypto/caam/caamhash.c
index 0378328f47a7..2d244e629ed2 100644
--- a/drivers/crypto/caam/caamhash.c
+++ b/drivers/crypto/caam/caamhash.c
@@ -545,7 +545,8 @@ static int ahash_setkey(struct crypto_ahash *ahash,
                                       DMA_TO_DEVICE);
         if (dma_mapping_error(jrdev, ctx->key_dma)) {
                 dev_err(jrdev, "unable to map key i/o memory\n");
-                return -ENOMEM;
+                ret = -ENOMEM;
+                goto map_err;
         }
 #ifdef DEBUG
         print_hex_dump(KERN_ERR, "ctx.key@"__stringify(__LINE__)": ",
@@ -559,6 +560,7 @@ static int ahash_setkey(struct crypto_ahash *ahash,
                                  DMA_TO_DEVICE);
         }
 
+map_err:
         kfree(hashed_key);
         return ret;
 badkey: