Received-SPF: pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::3:3 as permitted sender) client-ip=2620:137:e000::3:3;
Message-ID: <24e0ae5c-26bb-6efa-d59a-262541d2a452@redhat.com>
Date:   Wed, 1 Nov 2023 11:59:10 +0100
MIME-Version: 1.0
User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:102.0) Gecko/20100101
 Thunderbird/102.13.0
Subject: Re: [PATCH 1/2] vboxsf: Avoid an spurious warning if load_nls_xxx()
 fails
Content-Language: en-US, nl
To:     Christophe JAILLET <christophe.jaillet@wanadoo.fr>,
        Christoph Hellwig <hch@infradead.org>,
        Al Viro <viro@zeniv.linux.org.uk>
Cc:     linux-kernel@vger.kernel.org, kernel-janitors@vger.kernel.org,
        linux-fsdevel@vger.kernel.org
References: <d09eaaa4e2e08206c58a1a27ca9b3e81dc168773.1698835730.git.christophe.jaillet@wanadoo.fr>
From:   Hans de Goede <hdegoede@redhat.com>
In-Reply-To: <d09eaaa4e2e08206c58a1a27ca9b3e81dc168773.1698835730.git.christophe.jaillet@wanadoo.fr>
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 7bit
Precedence: bulk

Hi Christophe,

On 11/1/23 11:49, Christophe JAILLET wrote:
> If an load_nls_xxx() function fails a few lines above, the 'sbi->bdi_id' is
> still 0.
> So, in the error handling path, we will call ida_simple_remove(..., 0)
> which is not allocated yet.
> 
> In order to prevent a spurious "ida_free called for id=0 which is not
> allocated." message, tweak the error handling path and add a new label.
> 
> Fixes: 0fd169576648 ("fs: Add VirtualBox guest shared folder (vboxsf) support")
> Signed-off-by: Christophe JAILLET <christophe.jaillet@wanadoo.fr>

Thank you, both patches look good to me:

Reviewed-by: Hans de Goede <hdegoede@redhat.com>

for the series.

Regards,

Hans


> ---
>  fs/vboxsf/super.c | 3 ++-
>  1 file changed, 2 insertions(+), 1 deletion(-)
> 
> diff --git a/fs/vboxsf/super.c b/fs/vboxsf/super.c
> index 1fb8f4df60cb..9848af78215b 100644
> --- a/fs/vboxsf/super.c
> +++ b/fs/vboxsf/super.c
> @@ -151,7 +151,7 @@ static int vboxsf_fill_super(struct super_block *sb, struct fs_context *fc)
>  		if (!sbi->nls) {
>  			vbg_err("vboxsf: Count not load '%s' nls\n", nls_name);
>  			err = -EINVAL;
> -			goto fail_free;
> +			goto fail_destroy_idr;
>  		}
>  	}
>  
> @@ -224,6 +224,7 @@ static int vboxsf_fill_super(struct super_block *sb, struct fs_context *fc)
>  		ida_simple_remove(&vboxsf_bdi_ida, sbi->bdi_id);
>  	if (sbi->nls)
>  		unload_nls(sbi->nls);
> +fail_destroy_idr:
>  	idr_destroy(&sbi->ino_idr);
>  	kfree(sbi);
>  	return err;