init: do_mounts: recreate /dev/root

Rootfs shows as is mounted in /dev/root, but this devices is not present in /dev directory. Signed-off-by: Miguel Bernal Marin <[email protected]>
clearcontainers · Jan 3, 2018 · 48db9f0 · 48db9f0
1 parent d3caea5
commit 48db9f0
Showing 1 changed file with 8 additions and 0 deletions.
diff --git a/init/do_mounts.c b/init/do_mounts.c
@@ -550,6 +550,7 @@ void __init mount_root(void)
 void __init prepare_namespace(void)
 {
 	int is_floppy;
+	int err;
 
 	if (root_delay) {
 		printk(KERN_INFO "Waiting %d sec before mounting root device...\n",
@@ -604,6 +605,13 @@ void __init prepare_namespace(void)
 	devtmpfs_mount("dev");
 	sys_mount(".", "/", NULL, MS_MOVE, NULL);
 	sys_chroot(".");
+#ifdef CONFIG_BLOCK
+	/* recreate the /dev/root */
+	err = create_dev("/dev/root", ROOT_DEV);
+
+	if (err < 0)
+		pr_emerg("Failed to create /dev/root: %d\n", err);
+#endif
 }
 
 static bool is_tmpfs;