crypto: chelsio - don't leak pointers to authenc keys

In chcr_authenc_setkey and chcr_aead_digest_null_setkey we save
pointers to the authenc keys in local variables of type
struct crypto_authenc_keys and we don't zeroize them after use.
Fix this and don't leak pointers to the authenc keys.

Signed-off-by: Tudor Ambarus <tudor.ambarus@microchip.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>

diff --git a/drivers/crypto/chelsio/chcr_algo.c b/drivers/crypto/chelsio/chcr_algo.c
index 752ed9b..59fe663 100644 (file)
--- a/drivers/crypto/chelsio/chcr_algo.c
+++ b/drivers/crypto/chelsio/chcr_algo.c
@@ -3456,6 +3456,7 @@ static int chcr_authenc_setkey(struct crypto_aead *authenc, const u8 *key,
        if (IS_ERR(base_hash)) {
                pr_err("chcr : Base driver cannot be loaded\n");
                aeadctx->enckey_len = 0;
+               memzero_explicit(&keys, sizeof(keys));
                return -EINVAL;
        }
        {
@@ -3507,10 +3508,12 @@ static int chcr_authenc_setkey(struct crypto_aead *authenc, const u8 *key,
                actx->auth_mode = param.auth_mode;
                chcr_free_shash(base_hash);
 
+               memzero_explicit(&keys, sizeof(keys));
                return 0;
        }
 out:
        aeadctx->enckey_len = 0;
+       memzero_explicit(&keys, sizeof(keys));
        if (!IS_ERR(base_hash))
                chcr_free_shash(base_hash);
        return -EINVAL;
@@ -3573,9 +3576,11 @@ static int chcr_aead_digest_null_setkey(struct crypto_aead *authenc,
        aeadctx->key_ctx_hdr = FILL_KEY_CTX_HDR(ck_size, CHCR_KEYCTX_NO_KEY, 0,
                                                0, key_ctx_len >> 4);
        actx->auth_mode = CHCR_SCMD_AUTH_MODE_NOP;
+       memzero_explicit(&keys, sizeof(keys));
        return 0;
 out:
        aeadctx->enckey_len = 0;
+       memzero_explicit(&keys, sizeof(keys));
        return -EINVAL;
 }