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-rw-r--r--crypto/asn1/a_int.c4
1 files changed, 2 insertions, 2 deletions
diff --git a/crypto/asn1/a_int.c b/crypto/asn1/a_int.c
index 9a58378b8a..0d020e0c13 100644
--- a/crypto/asn1/a_int.c
+++ b/crypto/asn1/a_int.c
@@ -158,8 +158,8 @@ static size_t i2c_ibuf(const unsigned char *b, size_t blen, int neg,
if (pad)
*(p++) = pb;
- if (blen == 0)
- *(p++) = 0;
+ if (b == NULL || blen == 0)
+ *p = 0;
else if (!neg)
memcpy(p, b, blen);
else {