Re: [PATCH v2] bpf: fix filed access without lock

Hello:

This patch was applied to bpf/bpf.git (master)
by Martin KaFai Lau [off-list ref]:

On Mon, 28 Oct 2024 14:52:26 +0800 you wrote:

The tcp_bpf_recvmsg_parser() function, running in user context,
retrieves seq_copied from tcp_sk without holding the socket lock, and
stores it in a local variable seq. However, the softirq context can
modify tcp_sk->seq_copied concurrently, for example, n tcp_read_sock().

As a result, the seq value is stale when it is assigned back to
tcp_sk->copied_seq at the end of tcp_bpf_recvmsg_parser(), leading to
incorrect behavior.

[...]

Here is the summary with links:
  - [v2] bpf: fix filed access without lock
    https://git.kernel.org/bpf/bpf/c/2ce9abd6e1e1

You are awesome, thank you!
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