linux-kernel - Re: [PATCH] lib/radix-tree: Fix uninitialized variable compilation warning

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Message-ID: <Y20hkocEEoSNcSvZ@casper.infradead.org>
Date:   Thu, 10 Nov 2022 16:06:42 +0000
From:   Matthew Wilcox <willy@...radead.org>
To:     Rong Tao <rtoax@...mail.com>
Cc:     akpm@...ux-foundation.org, linux-kernel@...r.kernel.org,
        linux-mm@...ck.org, rongtao@...tc.cn, wuchi.zero@...il.com
Subject: Re: [PATCH] lib/radix-tree: Fix uninitialized variable compilation
 warning

On Thu, Nov 10, 2022 at 01:00:42PM +0800, Rong Tao wrote:
>  	radix_tree_load_root(root, &node, &maxindex);
> -	if (index > maxindex)
> +	if (index > maxindex || !node)
>  		return NULL;

No, stop it, you don't know what you're doing.