[libvirt] [PATCH] libxl: Resolve possible NULL dereference

[John Ferlan]

If we reached cleanup: prior to allocating cpus, it was possible that
'nr_nodes' had a value, but cpus was NULL leading to a possible NULL
deref. Add a 'cpus' as an end condition to for loop
---

Will push based upon pre-approved ACK:

https://www.redhat.com/archives/libvir-list/2013-August/msg00981.html

 src/libxl/libxl_conf.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/libxl/libxl_conf.c b/src/libxl/libxl_conf.c
index 01626b9..8129c7f 100644
--- a/src/libxl/libxl_conf.c
+++ b/src/libxl/libxl_conf.c
@@ -196,7 +196,7 @@ libxlCapsInitNuma(libxl_ctx *ctx, virCapsPtr caps)
 
  cleanup:
     if (ret != 0) {
-        for (i = 0; i < nr_nodes; i++)
+        for (i = 0; cpus && i < nr_nodes; i++)
             VIR_FREE(cpus[i]);
         virCapabilitiesFreeNUMAInfo(caps);
     }
-- 
1.8.3.1