[libvirt] [PATCH] free buf->content when vsnprintf() failed

[Wen Congyang]

When buf->error is 1, we do not return buf->content in the function
virBufferContentAndReset(). So we should free buf->content when
vsnprintf() failed.

---
 src/util/buf.c |    6 ++++++
 1 files changed, 6 insertions(+), 0 deletions(-)

diff --git a/src/util/buf.c b/src/util/buf.c
index 7557ad1..fdb7660 100644
--- a/src/util/buf.c
+++ b/src/util/buf.c
@@ -241,6 +241,9 @@ virBufferVSprintf(const virBufferPtr buf, const char *format, ...)
     size = buf->size - buf->use;
     if ((count = vsnprintf(&buf->content[buf->use],
                            size, format, argptr)) < 0) {
+        VIR_FREE(buf->content);
+        buf->size = 0;
+        buf->use = 0;
         buf->error = 1;
         goto err;
     }
@@ -259,6 +262,9 @@ virBufferVSprintf(const virBufferPtr buf, const char *format, ...)
         size = buf->size - buf->use;
         if ((count = vsnprintf(&buf->content[buf->use],
                                size, format, argptr)) < 0) {
+            VIR_FREE(buf->content);
+            buf->size = 0;
+            buf->use = 0;
             buf->error = 1;
             goto err;
         }
-- 
1.7.1