linux-kernel - Re: [PATCH net v3] net: bonding: Fix error checking for debugfs_create

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Date:   Mon, 17 Jul 2023 21:36:58 +0300
From:   Tariq Toukan <ttoukan.linux@...il.com>
To:     Wang Ming <machel@...o.com>, Jay Vosburgh <j.vosburgh@...il.com>,
        Andy Gospodarek <andy@...yhouse.net>,
        "David S. Miller" <davem@...emloft.net>,
        Eric Dumazet <edumazet@...gle.com>,
        Jakub Kicinski <kuba@...nel.org>,
        Paolo Abeni <pabeni@...hat.com>,
        Yufeng Mo <moyufeng@...wei.com>,
        Guangbin Huang <huangguangbin2@...wei.com>,
        netdev@...r.kernel.org, linux-kernel@...r.kernel.org
Cc:     opensource.kernel@...o.com, jay.vosburgh@...onical.com,
        Tariq Toukan <tariqt@...dia.com>
Subject: Re: [PATCH net v3] net: bonding: Fix error checking for
 debugfs_create_dir()



On 17/07/2023 11:53, Wang Ming wrote:
> The debugfs_create_dir() function returns error pointers,
> it never returns NULL. Most incorrect error checks were fixed,
> but the one in bond_create_debugfs() was forgotten.
> 
> Fixes: 52333512701b ("net: bonding: remove unnecessary braces")

It's not this commit to blame...
Issue was there in first place, starting in commit f073c7ca29a4 
("bonding: add the debugfs facility to the bonding driver").


> Signed-off-by: Wang Ming <machel@...o.com>
> ---
>   drivers/net/bonding/bond_debugfs.c | 2 +-
>   1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/drivers/net/bonding/bond_debugfs.c b/drivers/net/bonding/bond_debugfs.c
> index 594094526648..d4a82f276e87 100644
> --- a/drivers/net/bonding/bond_debugfs.c
> +++ b/drivers/net/bonding/bond_debugfs.c
> @@ -88,7 +88,7 @@ void bond_create_debugfs(void)
>   {
>   	bonding_debug_root = debugfs_create_dir("bonding", NULL);
>   
> -	if (!bonding_debug_root)
> +	if (IS_ERR(bonding_debug_root))
>   		pr_warn("Warning: Cannot create bonding directory in debugfs\n");
>   }
>