[PATCH v2 01/12] conf: Fix possible memleak in capabilities

[Martin Kletzander <mkletzan@xxxxxxxxxx>]

If formatting NUMA topology fails, the function returns immediatelly,
but the buffer structure allocated on the stack references lot of
heap-allocated memory and that would get lost in such case.

Signed-off-by: Martin Kletzander <mkletzan@xxxxxxxxxx>
---
 src/conf/capabilities.c | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/src/conf/capabilities.c b/src/conf/capabilities.c
index 08907aced1b9..be95c50cfb67 100644
--- a/src/conf/capabilities.c
+++ b/src/conf/capabilities.c
@@ -955,7 +955,7 @@ virCapabilitiesFormatXML(virCapsPtr caps)
     if (caps->host.nnumaCell &&
         virCapabilitiesFormatNUMATopology(&buf, caps->host.nnumaCell,
                                           caps->host.numaCell) < 0)
-        return NULL;
+        goto error;

     for (i = 0; i < caps->host.nsecModels; i++) {
         virBufferAddLit(&buf, "<secmodel>\n");
@@ -1072,6 +1072,10 @@ virCapabilitiesFormatXML(virCapsPtr caps)
         return NULL;

     return virBufferContentAndReset(&buf);
+
+ error:
+    virBufferFreeAndReset(&buf);
+    return NULL;
 }

 /* get the maximum ID of cpus in the host */
-- 
2.12.2

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