netdev - Re: [PATCH net] sfc: check for zero length in EF10 RX prefix

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Date: Fri, 01 Sep 2023 07:20:26 +0000
From: patchwork-bot+netdevbpf@...nel.org
To:  <edward.cree@....com>
Cc: linux-net-drivers@....com, davem@...emloft.net, kuba@...nel.org,
 edumazet@...gle.com, pabeni@...hat.com, ecree.xilinx@...il.com,
 netdev@...r.kernel.org, habetsm.xilinx@...il.com
Subject: Re: [PATCH net] sfc: check for zero length in EF10 RX prefix

Hello:

This patch was applied to netdev/net.git (main)
by David S. Miller <davem@...emloft.net>:

On Thu, 31 Aug 2023 17:58:11 +0100 you wrote:
> From: Edward Cree <ecree.xilinx@...il.com>
> 
> When EF10 RXDP firmware is operating in cut-through mode, packet length
>  is not known at the time the RX prefix is generated, so it is left as
>  zero and RX event merging is inhibited to ensure that the length is
>  available in the RX event.  However, it has been found that in certain
>  circumstances the RX events for these packets still get merged,
>  meaning the driver cannot read the length from the RX event, and tries
>  to use the length from the prefix.
> The resulting zero-length SKBs cause crashes in GRO since commit
>  1d11fa696733 ("net-gro: remove GRO_DROP"), so add a check to the driver
>  to detect these zero-length RX events and discard the packet.
> 
> [...]

Here is the summary with links:
  - [net] sfc: check for zero length in EF10 RX prefix
    https://git.kernel.org/netdev/net/c/ae074e2b2fd4

You are awesome, thank you!
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