dev_crypto_md5_update: check result of realloc(md_data->data) and don't leak memory...

Signed-off-by: Kurt Roeckx <kurt@openssl.org>
Reviewed-by: Rich Salz <rsalz@openssl.org>

diff --git a/crypto/evp/openbsd_hw.c b/crypto/evp/openbsd_hw.c
index 0554019489e7c40c24e738a534715d3dcafb1a9f..78ad707ad82edc398f9ad2554ecd8131acc07718 100644 (file)
--- a/crypto/evp/openbsd_hw.c
+++ b/crypto/evp/openbsd_hw.c
@@ -382,11 +382,15 @@ static int dev_crypto_md5_update(EVP_MD_CTX *ctx,const void *data,
                                 unsigned long len)
     {
     MD_DATA *md_data=ctx->md_data;
+    char *tmp_md_data;
 
     if(ctx->flags&EVP_MD_CTX_FLAG_ONESHOT)
        return do_digest(md_data->sess.ses,md_data->md,data,len);
 
-    md_data->data=OPENSSL_realloc(md_data->data,md_data->len+len);
+    tmp_md_data=OPENSSL_realloc(md_data->data,md_data->len+len);
+    if (tmp_md_data == NULL)
+       return 0;
+    md_data->data=tmp_md_data;
     memcpy(md_data->data+md_data->len,data,len);
     md_data->len+=len;