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-rw-r--r--crypto/bn/bn_x931p.c3
1 files changed, 3 insertions, 0 deletions
diff --git a/crypto/bn/bn_x931p.c b/crypto/bn/bn_x931p.c
index 516ad34ca7..40734cb2f6 100644
--- a/crypto/bn/bn_x931p.c
+++ b/crypto/bn/bn_x931p.c
@@ -74,6 +74,9 @@ int BN_X931_derive_prime_ex(BIGNUM *p, BIGNUM *p1, BIGNUM *p2,
pm1 = BN_CTX_get(ctx);
+ if (pm1 == NULL)
+ goto err;
+
if (!bn_x931_derive_pi(p1, Xp1, ctx, cb))
goto err;