X-Git-Url: https://git.openssl.org/gitweb/?p=openssl.git;a=blobdiff_plain;f=crypto%2Fhmac%2Fhm_pmeth.c;h=985921ca1ae20c7dda07cb52bc368916d954dd01;hp=aff7013b76d3ad0ec020a13db8eafc03ac5e8549;hb=0eab41fb78cf4d7c76e563fd677ab6c32fc28bb0;hpb=8aa02e97a782a4229936d5df6da42db3efe4acd1

diff --git a/crypto/hmac/hm_pmeth.c b/crypto/hmac/hm_pmeth.c
index aff7013b76..985921ca1a 100644
--- a/crypto/hmac/hm_pmeth.c
+++ b/crypto/hmac/hm_pmeth.c
@@ -157,7 +157,11 @@ static int hmac_signctx(EVP_PKEY_CTX *ctx, unsigned char *sig, size_t *siglen,
 	{
 	unsigned int hlen;
 	HMAC_PKEY_CTX *hctx = ctx->data;
-	*siglen = EVP_MD_CTX_size(mctx);
+	int l = EVP_MD_CTX_size(mctx);
+
+	if (l < 0)
+		return 0;
+	*siglen = l;
 	if (!sig)
 		return 1;