From ff0571b10c5e95f72daed39a30e5b18667f4d51e Mon Sep 17 00:00:00 2001 From: "Dr. Stephen Henson" Date: Fri, 5 Aug 2016 14:33:03 +0100 Subject: [PATCH] Check for errors in a2d_ASN1_OBJECT() Check for error return in BN_div_word(). Reviewed-by: Tim Hudson (cherry picked from commit 8b9afbc0fc7f8be0049d389d34d9416fa377e2aa) --- crypto/asn1/a_object.c | 8 ++++++-- 1 file changed, 6 insertions(+), 2 deletions(-) diff --git a/crypto/asn1/a_object.c b/crypto/asn1/a_object.c index fba9f66454..229a40ffa3 100644 --- a/crypto/asn1/a_object.c +++ b/crypto/asn1/a_object.c @@ -174,8 +174,12 @@ int a2d_ASN1_OBJECT(unsigned char *out, int olen, const char *buf, int num) if (!tmp) goto err; } - while (blsize--) - tmp[i++] = (unsigned char)BN_div_word(bl, 0x80L); + while (blsize--) { + BN_ULONG t = BN_div_word(bl, 0x80L); + if (t == (BN_ULONG)-1) + goto err; + tmp[i++] = (unsigned char)t; + } } else { for (;;) { -- 2.25.1