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Subject: Re: [PATCH bpf] cpumap: Zero-initialise xdp_rxq_info struct before
 running XDP program
From: patchwork-bot+netdevbpf@kernel.org
Message-Id: 
 <170968742549.25766.9821841549274494051.git-patchwork-notify@kernel.org>
Date: Wed, 06 Mar 2024 01:10:25 +0000
References: <20240305213132.11955-1-toke@redhat.com>
In-Reply-To: <20240305213132.11955-1-toke@redhat.com>
To: =?utf-8?b?VG9rZSBIw7hpbGFuZC1Kw7hyZ2Vuc2VuIDx0b2tlQHJlZGhhdC5jb20+?=@ci.codeaurora.org
Cc: ast@kernel.org, daniel@iogearbox.net, davem@davemloft.net,
 kuba@kernel.org, hawk@kernel.org, john.fastabend@gmail.com,
 andrii@kernel.org, martin.lau@linux.dev, song@kernel.org,
 yonghong.song@linux.dev, kpsingh@kernel.org, sdf@google.com,
 haoluo@google.com, jolsa@kernel.org, lorenzo@kernel.org, tobias@aibor.de,
 netdev@vger.kernel.org, bpf@vger.kernel.org

Hello:

This patch was applied to bpf/bpf.git (master)
by Martin KaFai Lau <martin.lau@kernel.org>:

On Tue,  5 Mar 2024 22:31:32 +0100 you wrote:
> When running an XDP program that is attached to a cpumap entry, we don't
> initialise the xdp_rxq_info data structure being used in the xdp_buff
> that backs the XDP program invocation. Tobias noticed that this leads to
> random values being returned as the xdp_md->rx_queue_index value for XDP
> programs running in a cpumap.
> 
> This means we're basically returning the contents of the uninitialised
> memory, which is bad. Fix this by zero-initialising the rxq data
> structure before running the XDP program.
> 
> [...]

Here is the summary with links:
  - [bpf] cpumap: Zero-initialise xdp_rxq_info struct before running XDP program
    https://git.kernel.org/bpf/bpf/c/2487007aa3b9

You are awesome, thank you!
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