netdev - Re: [PATCH] iplink: Fix descriptor leak in get_link

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Message-ID: <20240208090521.14c5e230@hermes.local>
Date: Thu, 8 Feb 2024 09:05:21 -0800
From: Stephen Hemminger <stephen@...workplumber.org>
To: Maks Mishin <maks.mishinfz@...il.com>
Cc: netdev@...r.kernel.org
Subject: Re: [PATCH] iplink: Fix descriptor leak in get_link_kind()

On Thu,  8 Feb 2024 00:04:50 +0300
Maks Mishin <maks.mishinfz@...il.com> wrote:

> Found by RASU JSC
> 
> Signed-off-by: Maks Mishin <maks.mishinFZ@...il.com>
> ---
>  ip/iplink.c | 3 +++
>  1 file changed, 3 insertions(+)
> 
> diff --git a/ip/iplink.c b/ip/iplink.c
> index 95314af5..7e31b95c 100644
> --- a/ip/iplink.c
> +++ b/ip/iplink.c
> @@ -168,6 +168,9 @@ struct link_util *get_link_kind(const char *id)
>  
>  	snprintf(buf, sizeof(buf), "%s_link_util", id);
>  	l = dlsym(dlh, buf);
> +	if (dlh != NULL)
> +		dlclose(dlh);
> +
>  	if (l == NULL)
>  		return NULL;
>  

NAK this will break the caching of BODY.