crypto: hkdf_expand(): call crypto_mac_free_ctx() instead of free()

A context allocated via crypto_mac_alloc_ctx() has to be freed using
crypto_mac_free_ctx(). While the default implementation just ends up
calling free(), other implementations may not.

Signed-off-by: Jerome Forissier <jerome.forissier@linaro.org>
Reported-by: Summer Qin <summer.qin@arm.com>
Reviewed-by: Jens Wiklander <jens.wiklander@linaro.org>

1 files changed, 1 insertions, 1 deletions

diff --git a/core/tee/tee_cryp_hkdf.c b/core/tee/tee_cryp_hkdf.c
index dcffa45b..01f37f1f 100644
--- a/core/tee/tee_cryp_hkdf.c
+++ b/core/tee/tee_cryp_hkdf.c
@@ -137,7 +137,7 @@ static TEE_Result hkdf_expand(uint32_t hash_id, const uint8_t *prk,
 	}
 
 out:
-	free(ctx);
+	crypto_mac_free_ctx(ctx, hmac_algo);
 	return res;
 }