[libvirt] [PATCH] LXC: fix memory leak in lxcContainerGetSubtree

[Gao feng]

when libvirt_lxc trigger oom error in lxcContainerGetSubtree
we should free the alloced memory for mounts.

so when lxcContainerGetSubtree failed,we should do some
memory cleanup in lxcContainerUnmountSubtree.

Signed-off-by: Gao feng <gaofeng at cn.fujitsu.com>
---
 src/lxc/lxc_container.c |   10 +++++-----
 1 files changed, 5 insertions(+), 5 deletions(-)

diff --git a/src/lxc/lxc_container.c b/src/lxc/lxc_container.c
index 5651255..633218c 100644
--- a/src/lxc/lxc_container.c
+++ b/src/lxc/lxc_container.c
@@ -1118,10 +1118,11 @@ static int lxcContainerGetSubtree(const char *prefix,
             virReportOOMError();
             goto cleanup;
         }
-        if (!(mounts[nmounts++] = strdup(mntent.mnt_dir))) {
+        if (!(mounts[nmounts] = strdup(mntent.mnt_dir))) {
             virReportOOMError();
             goto cleanup;
         }
+	nmounts++;
         VIR_DEBUG("Grabbed %s", mntent.mnt_dir);
     }
 
@@ -1129,11 +1130,10 @@ static int lxcContainerGetSubtree(const char *prefix,
         qsort(mounts, nmounts, sizeof(mounts[0]),
               lxcContainerChildMountSort);
 
-    *mountsret = mounts;
-    *nmountsret = nmounts;
     ret = 0;
-
 cleanup:
+    *mountsret = mounts;
+    *nmountsret = nmounts;
     endmntent(procmnt);
     return ret;
 }
@@ -1151,7 +1151,7 @@ static int lxcContainerUnmountSubtree(const char *prefix,
     VIR_DEBUG("Unmount subtreee from %s", prefix);
 
     if (lxcContainerGetSubtree(prefix, &mounts, &nmounts) < 0)
-        return -1;
+        goto cleanup;
     for (i = 0 ; i < nmounts ; i++) {
         VIR_DEBUG("Umount %s", mounts[i]);
         if (umount(mounts[i]) < 0) {
-- 
1.7.7.6