Re: [libvirt] [PATCH] storage_backend_fs: avoid NULL dereference on opendir failure

>From 7f453c68bc709d542e4c40a388c92c7969ad0a3a Mon Sep 17 00:00:00 2001 From: Jim Meyering <meyering(a)redhat.com&gt; Date: Wed, 2 Sep 2009 09:58:50 +0200 Subject: [PATCH 3/4] lxc: avoid NULL dereference when we find no mount point * src/lxc_container.c (lxcContainerUnmountOldFS): Don't pass a NULL pointer to qsort. --- src/lxc_container.c | 5 +++-- 1 files changed, 3 insertions(+), 2 deletions(-) diff --git a/src/lxc_container.c b/src/lxc_container.c index 950dd50..2073864 100644 --- a/src/lxc_container.c +++ b/src/lxc_container.c @@ -546,8 +546,9 @@ static int lxcContainerUnmountOldFS(void) } endmntent(procmnt); - qsort(mounts, nmounts, sizeof(mounts[0]), - lxcContainerChildMountSort); + if (mounts) + qsort(mounts, nmounts, sizeof(mounts[0]), + lxcContainerChildMountSort); for (i = 0 ; i < nmounts ; i++) { VIR_DEBUG("Umount %s", mounts[i]);