commit d22a7933d240818d8f1d22ae4daf22d192e968c6
author Gilles Peskine <Gilles.Peskine@arm.com> Tue Jan 21 16:56:03 2020 +0100
committer Gilles Peskine <Gilles.Peskine@arm.com> Wed Jan 22 19:06:32 2020 +0100
tree c9a8ca77a4e73c69fc4d8308790a4e5b6eb2e21b
parent d8180f8d84123704d04bb9d6fea7b36facdf7f00

Add missing return code check on call to mbedtls_md()

library/x509write_csr.c

diff --git a/library/x509write_csr.c b/library/x509write_csr.c
index d6e8c13..8582a8b 100644
--- a/library/x509write_csr.c
+++ b/library/x509write_csr.c
@@ -230,7 +230,9 @@
     /*
      * Prepare signature
      */
-    mbedtls_md( mbedtls_md_info_from_type( ctx->md_alg ), c, len, hash );
+    ret = mbedtls_md( mbedtls_md_info_from_type( ctx->md_alg ), c, len, hash );
+    if( ret != 0 )
+        return( ret );
 
     if( ( ret = mbedtls_pk_sign( ctx->key, ctx->md_alg, hash, 0, sig, &sig_len,
                                  f_rng, p_rng ) ) != 0 )