lists.openwall.net   lists  /  announce  owl-users  owl-dev  john-users  john-dev  passwdqc-users  yescrypt  popa3d-users  /  oss-security  kernel-hardening  musl  sabotage  tlsify  passwords  /  crypt-dev  xvendor  /  Bugtraq  Full-Disclosure  linux-kernel  linux-netdev  linux-ext4  linux-hardening  PHC 
Open Source and information security mailing list archives
 
Hash Suite: Windows password security audit tool. GUI, reports in PDF.
[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]
Date:   Sun, 27 Dec 2020 04:39:45 -0500
From:   "Michael S. Tsirkin" <mst@...hat.com>
To:     wangyunjian <wangyunjian@...wei.com>
Cc:     netdev@...r.kernel.org, jasowang@...hat.com,
        willemdebruijn.kernel@...il.com,
        virtualization@...ts.linux-foundation.org,
        jerry.lilijun@...wei.com, chenchanghu@...wei.com,
        xudingke@...wei.com, brian.huangbin@...wei.com
Subject: Re: [PATCH net] tun: fix return value when the number of iovs
 exceeds MAX_SKB_FRAGS

On Thu, Dec 24, 2020 at 07:48:53PM +0800, wangyunjian wrote:
> From: Yunjian Wang <wangyunjian@...wei.com>
> 
> Currently the tun_napi_alloc_frags() function returns -ENOMEM when the
> number of iovs exceeds MAX_SKB_FRAGS + 1. However this is inappropriate,
> we should use -EMSGSIZE instead of -ENOMEM.
> 
> Fixes: 90e33d459407 ("tun: enable napi_gro_frags() for TUN/TAP driver")
> Signed-off-by: Yunjian Wang <wangyunjian@...wei.com>

Acked-by: Michael S. Tsirkin <mst@...hat.com>

> ---
>  drivers/net/tun.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/drivers/net/tun.c b/drivers/net/tun.c
> index 2dc1988a8973..15c6dd7fb04c 100644
> --- a/drivers/net/tun.c
> +++ b/drivers/net/tun.c
> @@ -1365,7 +1365,7 @@ static struct sk_buff *tun_napi_alloc_frags(struct tun_file *tfile,
>  	int i;
>  
>  	if (it->nr_segs > MAX_SKB_FRAGS + 1)
> -		return ERR_PTR(-ENOMEM);
> +		return ERR_PTR(-EMSGSIZE);
>  
>  	local_bh_disable();
>  	skb = napi_get_frags(&tfile->napi);
> -- 
> 2.23.0

Powered by blists - more mailing lists