crypto: ccree - fix a memory leak in cc_mac_digest()

Add cc_unmap_result() if cc_map_hash_request_final()
fails to prevent potential memory leak.

Fixes: 63893811b0fc ("crypto: ccree - add ahash support")
Cc: stable@vger.kernel.org
Signed-off-by: Haoxiang Li <lihaoxiang@isrc.iscas.ac.cn>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>

diff --git a/drivers/crypto/ccree/cc_hash.c b/drivers/crypto/ccree/cc_hash.c
index c6d085c8ff797e3f9cc62324be741c1a61f71e12..73179bf725a712dde2d95482d3413d10413e336f 100644 (file)
--- a/drivers/crypto/ccree/cc_hash.c
+++ b/drivers/crypto/ccree/cc_hash.c
@@ -1448,6 +1448,7 @@ static int cc_mac_digest(struct ahash_request *req)
        if (cc_map_hash_request_final(ctx->drvdata, state, req->src,
                                      req->nbytes, 1, flags)) {
                dev_err(dev, "map_ahash_request_final() failed\n");
+               cc_unmap_result(dev, state, digestsize, req->result);
                cc_unmap_req(dev, state, ctx);
                return -ENOMEM;
        }