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-rw-r--r--crypto/bn/bn_exp.c3
1 files changed, 2 insertions, 1 deletions
diff --git a/crypto/bn/bn_exp.c b/crypto/bn/bn_exp.c
index 70a33f0d936c..d9b6c737fc82 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);