libcgroup: Bug fix in libcgroup wrapper api

From: Sudhir Kumar <skumar@linux.vnet.ibm.com>
The issue no 2309126 reported on sf.net tracker is fixed by this patch.

This patch fixes a segmentation fault in cgroup_free_controllers()
wrapper, which is generated when a Null cgroup is passed to the wrapper.

Signed-off-by: Sudhir Kumar <skumar@linux.vnet.ibm.com>


git-svn-id: https://libcg.svn.sourceforge.net/svnroot/libcg/trunk@222 4f4bb910-9a46-0410-90c8-c897d4f1cd53

1 files changed, 4 insertions, 0 deletions

diff --git a/wrapper.c b/wrapper.c
index b808f72..2f8fcf2 100644
--- a/wrapper.c
+++ b/wrapper.c
@@ -76,6 +76,10 @@ struct cgroup_controller *cgroup_add_controller(struct cgroup *cgroup,
 void cgroup_free_controllers(struct cgroup *cgroup)
 {
 	int i, j;
+
+	if (!cgroup)
+		return;
+
 	for (i = 0; i < cgroup->index; i++) {
 		for (j = 0; j < cgroup->controller[i]->index; j++)
 			free(cgroup->controller[i]->values[j]);