linux-kernel - Re: [PATCH 2/2] virtiofs: Improve error handling in virtio_fs_get

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Date: Fri, 29 Dec 2023 08:51:22 +0000
From: Matthew Wilcox <willy@...radead.org>
To: Markus Elfring <Markus.Elfring@....de>
Cc: virtualization@...ts.linux.dev, linux-fsdevel@...r.kernel.org,
	kernel-janitors@...r.kernel.org, Miklos Szeredi <miklos@...redi.hu>,
	Stefan Hajnoczi <stefanha@...hat.com>,
	Vivek Goyal <vgoyal@...hat.com>,
	LKML <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH 2/2] virtiofs: Improve error handling in
 virtio_fs_get_tree()

On Fri, Dec 29, 2023 at 09:38:47AM +0100, Markus Elfring wrote:
> From: Markus Elfring <elfring@...rs.sourceforge.net>
> Date: Fri, 29 Dec 2023 09:15:07 +0100
> 
> The kfree() function was called in two cases by
> the virtio_fs_get_tree() function during error handling
> even if the passed variable contained a null pointer.

So what?  kfree(NULL) is perfectly acceptable.  Are you trying to
optimise an error path?