cov: validate dev_get_primary_dev result

Make sure primary_dev is defined when using it.

diff --git a/lib/device/dev-mpath.c b/lib/device/dev-mpath.c
index 5433b64e138c6a9ef16e507afe76f8c9872d544b..e6fc63afd8c6bd83f23a309f9a832ddebcf2f9ff 100644 (file)
--- a/lib/device/dev-mpath.c
+++ b/lib/device/dev-mpath.c
@@ -688,7 +688,8 @@ int dev_is_mpath_component(struct cmd_context *cmd, struct device *dev, dev_t *h
         * primary_result 2: dev is a partition, primary_dev is the whole device
         * primary_result 1: dev is a whole device
         */
-       primary_result = dev_get_primary_dev(dt, dev, &primary_dev);
+       if (!(primary_result = dev_get_primary_dev(dt, dev, &primary_dev)))
+               return_0;
 
        if (_dev_is_mpath_component_sysfs(cmd, dev, primary_result, primary_dev, holder_devno) == 1)
                goto found;