From: Kurt Roeckx <kurt@roeckx.be>
Date: Sat, 4 Jun 2016 17:52:28 +0000 (+0200)
Subject: Avoid creating an illegal pointer.
X-Git-Tag: OpenSSL_1_1_0-pre6~491
X-Git-Url: https://git.librecmc.org/?a=commitdiff_plain;h=8c918b7b9c93ba38790ffd1a83e23c3684e66f57;p=oweals%2Fopenssl.git

Avoid creating an illegal pointer.

Found by tis-interpreter

Reviewed-by: Rich Salz <rsalz@openssl.org>

GH: #1166
---

diff --git a/crypto/asn1/asn1_par.c b/crypto/asn1/asn1_par.c
index 51da0143aa..1e17895f26 100644
--- a/crypto/asn1/asn1_par.c
+++ b/crypto/asn1/asn1_par.c
@@ -86,8 +86,7 @@ static int asn1_parse2(BIO *bp, const unsigned char **pp, long length,
     dump_indent = 6;            /* Because we know BIO_dump_indent() */
     p = *pp;
     tot = p + length;
-    op = p - 1;
-    while ((p < tot) && (op < p)) {
+    while (length > 0) {
         op = p;
         j = ASN1_get_object(&p, &len, &tag, &xclass, length);
         if (j & 0x80) {