machined: validate machine names at more places

When enumerating machines from /run, and when accepting machine names
for operations, be more strict and always validate.

Note that these checks are strictly speaking unnecessary, since
enumeration happens only on the trusted /run...

1 files changed, 1 insertions, 1 deletions

diff --git a/src/libsystemd/sd-login/sd-login.c b/src/libsystemd/sd-login/sd-login.c
index 5f290573cb..0eadc8c747 100644
--- a/src/libsystemd/sd-login/sd-login.c
+++ b/src/libsystemd/sd-login/sd-login.c
@@ -791,7 +791,7 @@ _public_ int sd_get_machine_names(char ***machines) {
 
                 /* Filter out the unit: symlinks */
                 for (a = l, b = l; *a; a++) {
-                        if (startswith(*a, "unit:"))
+                        if (startswith(*a, "unit:") || !machine_name_is_valid(*a))
                                 free(*a);
                         else {
                                 *b = *a;