[libvirt] [PATCH] lxc_cgroup: Add check for NULL cgroup before AddTask call

Commit id '71ce4759' altered the cgroup processing with respect to the call to virCgroupAddTask being moved out from lower layers into the calling layers especially for qemu processing of emulator and vcpu threads. The movement affected lxc insomuch as it is possible for a code path to return a NULL cgroup *and* a 0 return status via virCgroupNewPartition failure when virCgroupNewIgnoreError succeeded when virCgroupNewMachineManual returns. Coverity pointed out that would cause virCgroupAddTask to core. This patch will check for a NULL cgroup as well as the negative return and just return the NULL cgroup to the caller (as it would have previously) Signed-off-by: John Ferlan <jferlan(a)redhat.com&gt; --- src/lxc/lxc_cgroup.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/src/lxc/lxc_cgroup.c b/src/lxc/lxc_cgroup.c index 609e9ea..ef332e3 100644 --- a/src/lxc/lxc_cgroup.c +++ b/src/lxc/lxc_cgroup.c @@ -501,7 +501,7 @@ virCgroupPtr virLXCCgroupCreate(virDomainDefPtr def, nnicindexes, nicindexes, def->resource->partition, -1, - &cgroup) < 0) + &cgroup) < 0 || !cgroup) goto cleanup; if (virCgroupAddTask(cgroup, initpid) < 0) { -- 2.5.0