[PATCH] mbedtls: fix defects in coverity scan

[Raymond Mao]

Fixes of unreleased buffer, deadcode and wrong variable type detected
by coverity scan.

Addresses-Coverity-ID: 510809:  Resource leaks  (RESOURCE_LEAK)
Addresses-Coverity-ID: 510806:  Control flow issues  (DEADCODE)
Addresses-Coverity-ID: 510794 Control flow issues  (NO_EFFECT)

Signed-off-by: Raymond Mao <raymond.mao at linaro.org>
---
 lib/mbedtls/pkcs7_parser.c     | 7 +++----
 lib/mbedtls/x509_cert_parser.c | 2 +-
 2 files changed, 4 insertions(+), 5 deletions(-)

diff --git a/lib/mbedtls/pkcs7_parser.c b/lib/mbedtls/pkcs7_parser.c
index 69ca784858e..ecfcc46edfa 100644
--- a/lib/mbedtls/pkcs7_parser.c
+++ b/lib/mbedtls/pkcs7_parser.c
@@ -206,9 +206,6 @@ static int authattrs_parse(struct pkcs7_message *msg, void *aa, size_t aa_len,
 		p += seq_len;
 	}
 
-	if (ret && ret !=  MBEDTLS_ERR_ASN1_OUT_OF_DATA)
-		return ret;
-
 	msg->have_authattrs = true;
 
 	/*
@@ -361,8 +358,10 @@ static int x509_populate_sinfo(struct pkcs7_message *msg,
 	signed_info->sig = s;
 
 	/* Save the Authenticate Attributes data if exists */
-	if (!mb_sinfo->authattrs.data || !mb_sinfo->authattrs.data_len)
+	if (!mb_sinfo->authattrs.data || !mb_sinfo->authattrs.data_len) {
+		kfree(mctx);
 		goto no_authattrs;
+	}
 
 	mctx->authattrs_data = kmemdup(mb_sinfo->authattrs.data,
 				       mb_sinfo->authattrs.data_len,
diff --git a/lib/mbedtls/x509_cert_parser.c b/lib/mbedtls/x509_cert_parser.c
index cb42018695c..e163e16b9bc 100644
--- a/lib/mbedtls/x509_cert_parser.c
+++ b/lib/mbedtls/x509_cert_parser.c
@@ -66,7 +66,7 @@ time64_t x509_get_timestamp(const mbedtls_x509_time *x509_time)
 static char *x509_populate_dn_name_string(const mbedtls_x509_name *name)
 {
 	size_t len = 256;
-	size_t wb;
+	int wb;
 	char *name_str;
 
 	do {
-- 
2.25.1