From 8241402c1aadd32f1918d75d04da485430818dcb Mon Sep 17 00:00:00 2001
From: Tom Gundersen <teg@jklm.no>
Date: Mon, 25 May 2015 22:47:42 +0200
Subject: [PATCH] import: dkr - avoid NULL-pointer dereference

A malformed manifest could in principle cause a NULL pointer dereference of. Check
for this and fail early.

Fixes CID 1299642.

(cherry picked from commit 37591152d261ba980b8992de37ee940c9e5c5da0)
---
 src/import/pull-dkr.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/import/pull-dkr.c b/src/import/pull-dkr.c
index 40aca786a5..d7476dc340 100644
--- a/src/import/pull-dkr.c
+++ b/src/import/pull-dkr.c
@@ -864,7 +864,7 @@ static void dkr_pull_job_on_finished_v2(PullJob *j) {
                 }
 
                 e = json_variant_value(doc, "fsLayers");
-                if (!e || e->type != JSON_VARIANT_ARRAY) {
+                if (!e || e->type != JSON_VARIANT_ARRAY || e->size == 0) {
                         r = -EBADMSG;
                         goto finish;
                 }