1 files changed, 4 insertions, 2 deletions
diff --git a/crypto/asn1/bio_asn1.c b/crypto/asn1/bio_asn1.c
index 60189b3b2c53..c3afff69dc7e 100644
--- a/crypto/asn1/bio_asn1.c
+++ b/crypto/asn1/bio_asn1.c
@@ -170,10 +170,12 @@ static int asn1_bio_init(BIO_ASN1_BUF_CTX *ctx, int size)
     ctx->copylen = 0;
     ctx->asn1_class = V_ASN1_UNIVERSAL;
     ctx->asn1_tag = V_ASN1_OCTET_STRING;
-    ctx->ex_buf = 0;
-    ctx->ex_pos = 0;
+    ctx->ex_buf = NULL;
     ctx->ex_len = 0;
+    ctx->ex_pos = 0;
     ctx->state = ASN1_STATE_START;
+    ctx->prefix = ctx->prefix_free = ctx->suffix = ctx->suffix_free = NULL;
+    ctx->ex_arg = NULL;
     return 1;
 }