FAILED: patch "[PATCH] bootconfig: init: Fix memblock leak in xbc_make_cmdline()" failed to apply to 5.10-stable tree

The patch below does not apply to the 5.10-stable tree.
If someone wants it applied there, or to any other stable or longterm tree, then please email the backport, including the original git commit id to <[email protected]>.

thanks,

greg k-h

------------------ original commit in Linus's tree ------------------

From 1ae43851b18afe861120ebd7c426dc44f06bb2bd Mon Sep 17 00:00:00 2001
From: Masami Hiramatsu <[email protected]>
Date: Thu, 16 Sep 2021 15:23:12 +0900
Subject: [PATCH] bootconfig: init: Fix memblock leak in xbc_make_cmdline()

Free unused memblock in a error case to fix memblock leak in xbc_make_cmdline().

index 81a79a77db46..3c4054a95545 100644
@@ -382,6 +382,7 @@ static char * __init xbc_make_cmdline(const char *key)
 	ret = xbc_snprint_cmdline(new_cmdline, len + 1, root);
 	if (ret < 0 || ret > len) {
 		pr_err("Failed to print extra kernel cmdline.\n");
+		memblock_free_ptr(new_cmdline, len + 1);
 		return NULL;
 	}