linux-kernel - Re: [PATCH net-next] rxrpc: Fix ability to add more data to a call once MSG

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Message-Id: 
 <173440143824.415501.3353560173014525806.git-patchwork-notify@kernel.org>
Date: Tue, 17 Dec 2024 02:10:38 +0000
From: patchwork-bot+netdevbpf@...nel.org
To: David Howells <dhowells@...hat.com>
Cc: netdev@...r.kernel.org, marc.dionne@...istor.com, kuba@...nel.org,
 davem@...emloft.net, edumazet@...gle.com, pabeni@...hat.com,
 linux-afs@...ts.infradead.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH net-next] rxrpc: Fix ability to add more data to a call once
 MSG_MORE deasserted

Hello:

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

On Thu, 12 Dec 2024 21:04:22 +0000 you wrote:
> When userspace is adding data to an RPC call for transmission, it must pass
> MSG_MORE to sendmsg() if it intends to add more data in future calls to
> sendmsg().  Calling sendmsg() without MSG_MORE being asserted closes the
> transmission phase of the call (assuming sendmsg() adds all the data
> presented) and further attempts to add more data should be rejected.
> 
> However, this is no longer the case.  The change of call state that was
> previously the guard got bumped over to the I/O thread, which leaves a
> window for a repeat sendmsg() to insert more data.  This previously went
> unnoticed, but the more recent patch that changed the structures behind the
> Tx queue added a warning:
> 
> [...]

Here is the summary with links:
  - [net-next] rxrpc: Fix ability to add more data to a call once MSG_MORE deasserted
    https://git.kernel.org/netdev/net-next/c/ae4f89989479

You are awesome, thank you!
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