hotplug: add extra validation for commands

[project/procd.git] / hotplug-rule.c

diff --git a/hotplug-rule.c b/hotplug-rule.c
index 7e9c16a..b157fcd 100644 (file)
--- a/hotplug-rule.c
+++ b/hotplug-rule.c
@@ -399,6 +399,12 @@ static int __rule_process_cmd(struct blob_attr *cur, struct blob_attr *msg)
        bool found;
        int ret;
 
+       if (blobmsg_type(cur) != BLOBMSG_TYPE_ARRAY ||
+           blobmsg_type(blobmsg_data(cur)) != BLOBMSG_TYPE_STRING) {
+               rule_error(cur, "Unexpected element type");
+               return -1;
+       }
+
        ret = __rule_process_type(cur, msg, cmd, ARRAY_SIZE(cmd), &found);
        if (found)
                return ret;