lxc_unshare: make mount table private

Signed-off-by: Christian Brauner <christian.brauner@ubuntu.com>

lxc_unshare: make mount table private
ecd92dff · Christian Brauner · b235962c · ecd92dff
Unverified Commit ecd92dff authored Jul 05, 2021 by Christian Brauner
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Showing with 7 additions and 2 deletions

lxc_unshare.c src/lxc/tools/lxc_unshare.c +7 -2

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--- a/src/lxc/tools/lxc_unshare.c
+++ b/src/lxc/tools/lxc_unshare.c
@@ -246,8 +246,13 @@ static int do_start(void *arg)
 		}
 	}

-	if ((start_arg->flags & CLONE_NEWNS) && start_arg->want_default_mounts)
-		lxc_setup_fs();
+	if (start_arg->flags & CLONE_NEWNS) {
+		if (mount(NULL, "/", NULL, MS_REC | MS_PRIVATE, 0) < 0)
+			_exit(EXIT_FAILURE);
+
+		if (start_arg->want_default_mounts)
+			lxc_setup_fs();
+	}

 	if ((start_arg->flags & CLONE_NEWUTS) && want_hostname)
 		if (sethostname(want_hostname, strlen(want_hostname)) < 0) {