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-rw-r--r--src/core/machine-id-setup.c8
1 files changed, 6 insertions, 2 deletions
diff --git a/src/core/machine-id-setup.c b/src/core/machine-id-setup.c
index c6fd77ac8d..7f4c23b130 100644
--- a/src/core/machine-id-setup.c
+++ b/src/core/machine-id-setup.c
@@ -226,13 +226,17 @@ int machine_id_setup(void) {
}
/* And now, let's mount it over */
- r = mount("/run/machine-id", "/etc/machine-id", "bind", MS_BIND|MS_RDONLY, NULL) < 0 ? -errno : 0;
+ r = mount("/run/machine-id", "/etc/machine-id", NULL, MS_BIND, NULL) < 0 ? -errno : 0;
if (r < 0) {
unlink("/run/machine-id");
log_error("Failed to mount /etc/machine-id: %s", strerror(-r));
- } else
+ } else {
log_info("Installed transient /etc/machine-id file.");
+ /* Mark the mount read-only */
+ mount(NULL, "/etc/machine-id", NULL, MS_BIND|MS_RDONLY|MS_REMOUNT, NULL);
+ }
+
finish:
if (fd >= 0)