From: Peter Krempa <pkrempa@redhat.com>
Date: Thu, 22 Mar 2018 12:10:40 +0000 (+0100)
Subject: util: buffer: Tolerate NULL 'buf' in virBufferStrcat
X-Git-Tag: v4.2.0-rc1~29
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=9be9e26b74e4a8cf5798f1937662ac5f2f2f1f58;p=thirdparty%2Flibvirt.git

util: buffer: Tolerate NULL 'buf' in virBufferStrcat

Most other buffer APIs tolerate the buffer being NULL.

Signed-off-by: Peter Krempa <pkrempa@redhat.com>
---

diff --git a/src/util/virbuffer.c b/src/util/virbuffer.c
index 1a6bf122e0..3d6defb73a 100644
--- a/src/util/virbuffer.c
+++ b/src/util/virbuffer.c
@@ -883,6 +883,9 @@ virBufferStrcat(virBufferPtr buf, ...)
 {
     va_list ap;
 
+    if (!buf)
+        return;
+
     va_start(ap, buf);
     virBufferStrcatVArgs(buf, ap);
     va_end(ap);