[PATCH 1/2] ids: Make sure kIDs is present in image

[Cyrill Gorcunov]

Otherwise yield error instead of nil dereference
if we meet a broken image.

Signed-off-by: Cyrill Gorcunov <gorcunov at openvz.org>
---
 pstree.c | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/pstree.c b/pstree.c
index 5bfcbdc..64e8add 100644
--- a/pstree.c
+++ b/pstree.c
@@ -497,6 +497,14 @@ static int prepare_pstree_kobj_ids(void)
 		else
 			ids = root_ids;
 
+		/*
+		 * Add some sanity check on image data.
+		 */
+		if (unlikely(!ids)) {
+			pr_err("No kIDs provided, image corruption\n");
+			return -1;
+		}
+
 		cflags = get_clone_mask(item->ids, ids);
 
 		if (cflags & CLONE_FILES) {
-- 
1.8.1.4


--PEIAKu/WMn1b1Hv9--