[PATCH] board: fsl_validate: Fix resource leak issue

[Kshitiz Varshney]

Free dynamically allocated memory before every return statement
in calc_esbchdr_esbc_hash() function.
Verified the secure boot changes using ls1046afrwy board.

Signed-off-by: Kshitiz Varshney <kshitiz.varsh...@nxp.com>
---
 board/freescale/common/fsl_validate.c | 25 ++++++++++++++++++-------
 1 file changed, 18 insertions(+), 7 deletions(-)

diff --git a/board/freescale/common/fsl_validate.c 
b/board/freescale/common/fsl_validate.c
index 564a8b3b54..05d9a004e7 100644
--- a/board/freescale/common/fsl_validate.c
+++ b/board/freescale/common/fsl_validate.c
@@ -547,14 +547,18 @@ static int calc_esbchdr_esbc_hash(struct 
fsl_secboot_img_priv *img)
 
        ret = algo->hash_init(algo, &ctx);
        /* Copy hash at destination buffer */
-       if (ret)
+       if (ret) {
+               free(ctx);
                return ret;
+       }
 
        /* Update hash for CSF Header */
        ret = algo->hash_update(algo, ctx,
                (u8 *)&img->hdr, sizeof(struct fsl_secboot_img_hdr), 0);
-       if (ret)
+       if (ret) {
+               free(ctx);
                return ret;
+       }
 
        /* Update the hash with that of srk table if srk flag is 1
         * If IE Table is selected, key is not added in the hash
@@ -581,22 +585,29 @@ static int calc_esbchdr_esbc_hash(struct 
fsl_secboot_img_priv *img)
                key_hash = 1;
        }
 #endif
-       if (ret)
+       if (ret) {
+               free(ctx);
                return ret;
-       if (!key_hash)
+       }
+       if (!key_hash) {
+               free(ctx);
                return ERROR_KEY_TABLE_NOT_FOUND;
+       }
 
        /* Update hash for actual Image */
        ret = algo->hash_update(algo, ctx,
                (u8 *)(*(img->img_addr_ptr)), img->img_size, 1);
-       if (ret)
+       if (ret) {
+               free(ctx);
                return ret;
+       }
 
        /* Copy hash at destination buffer */
        ret = algo->hash_finish(algo, ctx, hash_val, algo->digest_size);
-       if (ret)
+       if (ret) {
+               free(ctx);
                return ret;
-
+       }
        return 0;
 }
 
-- 
2.25.1