From: Tomas Mraz <tomas@openssl.org>
Date: Tue, 27 Sep 2022 15:50:35 +0000 (+0200)
Subject: dgram_pair_read_inner(): Do not move buf pointer if it is NULL
X-Git-Tag: openssl-3.2.0-alpha1~2003
X-Git-Url: http://git.ipfire.org/gitweb.cgi?a=commitdiff_plain;h=9643ddb13af88c153c150c91ae538ff04808577e;p=thirdparty%2Fopenssl.git

dgram_pair_read_inner(): Do not move buf pointer if it is NULL

Reviewed-by: Richard Levitte <levitte@openssl.org>
Reviewed-by: Paul Dale <pauli@openssl.org>
(Merged from https://github.com/openssl/openssl/pull/19284)
---

diff --git a/crypto/bio/bss_dgram_pair.c b/crypto/bio/bss_dgram_pair.c
index 2b99f794e06..fedcd66dd35 100644
--- a/crypto/bio/bss_dgram_pair.c
+++ b/crypto/bio/bss_dgram_pair.c
@@ -745,7 +745,8 @@ static size_t dgram_pair_read_inner(struct bio_dgram_pair_st *b, uint8_t *buf, s
 
         ring_buf_pop(&b->rbuf, src_len);
 
-        buf         += src_len;
+        if (buf != NULL)
+            buf += src_len;
         total_read  += src_len;
         sz          -= src_len;
     }