commit 3a3b161e9629ffcece3909c04a7369a49e8c44cc
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 18:59:37 2020 +0100
tree 8a9af66e849c297b4cddf22ab7c7c53bfd6c22a8
parent 39e2c0eeb6501980764793e8d54c49c0a42bde48

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 b65a11c..7406a97 100644
--- a/library/x509write_csr.c
+++ b/library/x509write_csr.c
@@ -226,7 +226,9 @@
     /*
      * 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 )