netdev - Re: [PATCH net] net: ethernet: lantiq

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Message-ID: <f198e784-119e-448c-8c72-a02075623809@wp.pl>
Date: Tue, 16 Jul 2024 21:27:57 +0200
From: Aleksander Jan Bajkowski <olek2@...pl>
To: Paolo Abeni <pabeni@...hat.com>, davem@...emloft.net,
 edumazet@...gle.com, kuba@...nel.org, shannon.nelson@....com,
 sd@...asysnail.net, u.kleine-koenig@...gutronix.de, john@...ozen.org,
 ralf@...ux-mips.org, ralph.hempel@...tiq.com, netdev@...r.kernel.org,
 linux-kernel@...r.kernel.org
Subject: Re: [PATCH net] net: ethernet: lantiq_etop: fix memory disclosure

Hi Paolo,

On 16.07.2024 11:46, Paolo Abeni wrote:
> On 7/14/24 00:33, Aleksander Jan Bajkowski wrote:
>> diff --git a/drivers/net/ethernet/lantiq_etop.c 
>> b/drivers/net/ethernet/lantiq_etop.c
>> index 0b9982804370..196715d9ea43 100644
>> --- a/drivers/net/ethernet/lantiq_etop.c
>> +++ b/drivers/net/ethernet/lantiq_etop.c
>> @@ -478,11 +478,11 @@ ltq_etop_tx(struct sk_buff *skb, struct 
>> net_device *dev)
>>       struct ltq_etop_priv *priv = netdev_priv(dev);
>>       struct ltq_etop_chan *ch = &priv->ch[(queue << 1) | 1];
>>       struct ltq_dma_desc *desc = &ch->dma.desc_base[ch->dma.desc];
>> -    int len;
>>       unsigned long flags;
>>       u32 byte_offset;
>>   -    len = skb->len < ETH_ZLEN ? ETH_ZLEN : skb->len;
>> +    if (skb_put_padto(skb, ETH_ZLEN))
>
> You may want to increment tx drop stats here.

Statistics are on my TODO list. The current version of this driver
does not support statistics, so I will add them then. I would first
prefer to fix all the bugs present in the current version of the driver
and then add new features.


>
> Thanks,
>
> Paolo
>
Best regards,
Aleksander