ethtool: make ethtool_get_driver() return -ENODATA if ioctl succeeds but driver name is empty

Inspired by #17532.
2020-11-10 01:14:42 +09:00
parent a93187ced5
commit 861de64e68
1 changed files with 3 additions and 0 deletions
@@ -197,6 +197,9 @@ int ethtool_get_driver(int *ethtool_fd, const char *ifname, char **ret) {
        if (r < 0)
                return -errno;

+        if (isempty(ecmd.driver))
+                return -ENODATA;
+
        d = strdup(ecmd.driver);
        if (!d)
                return -ENOMEM;