[PATCH] board: fsl_validate: Fix resource leak issue

[Kshitiz Varshney]

Free dynamically allocated memory before every return statement
in calc_img_key_hash() function.
Verified the secure boot changes using ls1046afrwy board.
Signed-off-by: Kshitiz Varshney <kshitiz.varshney at nxp.com>
---
 board/freescale/common/fsl_validate.c | 10 ++++++++--
 1 file changed, 8 insertions(+), 2 deletions(-)

diff --git a/board/freescale/common/fsl_validate.c b/board/freescale/common/fsl_validate.c
index 564a8b3b54..d553bd88a0 100644
--- a/board/freescale/common/fsl_validate.c
+++ b/board/freescale/common/fsl_validate.c
@@ -498,8 +498,11 @@ static int calc_img_key_hash(struct fsl_secboot_img_priv *img)
 		return ret;
 
 	ret = algo->hash_init(algo, &ctx);
-	if (ret)
+	if (ret) {
+		if (ctx)
+			free(ctx);
 		return ret;
+	}
 
 	/* Update hash for ESBC key */
 #ifdef CONFIG_KEY_REVOCATION
@@ -518,8 +521,11 @@ static int calc_img_key_hash(struct fsl_secboot_img_priv *img)
 
 	/* Copy hash at destination buffer */
 	ret = algo->hash_finish(algo, ctx, hash_val, algo->digest_size);
-	if (ret)
+	if (ret) {
+		if (ctx)
+			free(ctx);
 		return ret;
+	}
 
 	for (i = 0; i < SHA256_BYTES; i++)
 		img->img_key_hash[i] = hash_val[i];
-- 
2.25.1