X-Git-Url: https://git.openssl.org/?p=openssl.git;a=blobdiff_plain;f=crypto%2Fbn%2Fbn_exp.c;h=d9b6c737fc82f5f5f8c4bc9a5d7ba23ee8627c73;hp=70a33f0d936c81fab3f6a77e411f7e354c652edc;hb=d70323f1c5fcc8845a2edf48b49178526b7b0305;hpb=716cddc03cfb313d57912bb40fd95395abc2a4c0

diff --git a/crypto/bn/bn_exp.c b/crypto/bn/bn_exp.c
index 70a33f0d93..d9b6c737fc 100644
--- a/crypto/bn/bn_exp.c
+++ b/crypto/bn/bn_exp.c
@@ -134,7 +134,8 @@ int BN_exp(BIGNUM *r, const BIGNUM *a, const BIGNUM *p, BN_CTX *ctx)
 		rr = BN_CTX_get(ctx);
 	else
 		rr = r;
-	if ((v = BN_CTX_get(ctx)) == NULL) goto err;
+	v = BN_CTX_get(ctx);
+	if (rr == NULL || v == NULL) goto err;
 
 	if (BN_copy(v,a) == NULL) goto err;
 	bits=BN_num_bits(p);