netdev - Re: [PATCH net-next v2] virtio-net: fix possible unsigned integer overflow

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Date:   Thu, 02 Feb 2023 06:20:16 +0000
From:   patchwork-bot+netdevbpf@...nel.org
To:     Heng Qi <hengqi@...ux.alibaba.com>
Cc:     netdev@...r.kernel.org, bpf@...r.kernel.org, mst@...hat.com,
        jasowang@...hat.com, pabeni@...hat.com, kuba@...nel.org,
        john.fastabend@...il.com, davem@...emloft.net,
        daniel@...earbox.net, ast@...nel.org, edumazet@...gle.com,
        xuanzhuo@...ux.alibaba.com
Subject: Re: [PATCH net-next v2] virtio-net: fix possible unsigned integer
 overflow

Hello:

This patch was applied to netdev/net-next.git (master)
by Jakub Kicinski <kuba@...nel.org>:

On Tue, 31 Jan 2023 16:50:04 +0800 you wrote:
> When the single-buffer xdp is loaded and after xdp_linearize_page()
> is called, *num_buf becomes 0 and (*num_buf - 1) may overflow into
> a large integer in virtnet_build_xdp_buff_mrg(), resulting in
> unexpected packet dropping.
> 
> Fixes: ef75cb51f139 ("virtio-net: build xdp_buff with multi buffers")
> Signed-off-by: Heng Qi <hengqi@...ux.alibaba.com>
> Reviewed-by: Xuan Zhuo <xuanzhuo@...ux.alibaba.com>
> Signed-off-by: Michael S. Tsirkin <mst@...hat.com>
> 
> [...]

Here is the summary with links:
  - [net-next,v2] virtio-net: fix possible unsigned integer overflow
    https://git.kernel.org/netdev/net-next/c/981f14d42a7f

You are awesome, thank you!
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