linux-kernel - Re: [PATCH net-next v4] tcp: Correct signedness in skb remaining space calculation

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Message-Id: 
 <175198741125.4099273.6939974180776177373.git-patchwork-notify@kernel.org>
Date: Tue, 08 Jul 2025 15:10:11 +0000
From: patchwork-bot+netdevbpf@...nel.org
To: Jiayuan Chen <jiayuan.chen@...ux.dev>
Cc: netdev@...r.kernel.org, mrpre@....com,
 syzbot+de6565462ab540f50e47@...kaller.appspotmail.com, edumazet@...gle.com,
 ncardwell@...gle.com, kuniyu@...gle.com, davem@...emloft.net,
 dsahern@...nel.org, kuba@...nel.org, pabeni@...hat.com, horms@...nel.org,
 dhowells@...hat.com, linux-kernel@...r.kernel.org
Subject: Re: [PATCH net-next v4] tcp: Correct signedness in skb remaining
 space
 calculation

Hello:

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

On Mon,  7 Jul 2025 13:41:11 +0800 you wrote:
> Syzkaller reported a bug [1] where sk->sk_forward_alloc can overflow.
> 
> When we send data, if an skb exists at the tail of the write queue, the
> kernel will attempt to append the new data to that skb. However, the code
> that checks for available space in the skb is flawed:
> '''
> copy = size_goal - skb->len
> '''
> 
> [...]

Here is the summary with links:
  - [net-next,v4] tcp: Correct signedness in skb remaining space calculation
    https://git.kernel.org/netdev/net/c/d3a5f2871adc

You are awesome, thank you!
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