Re: [PATCH net v2] net: skmsg: preserve sg.copy across SG transforms

[Jakub Kicinski]

On Wed, 10 Jun 2026 06:21:36 +0000 Yiming Qian wrote:
> The sk_msg sg.copy bitmap is part of the scatterlist entry ownership
> state. A set bit tells sk_msg_compute_data_pointers() not to expose the
> entry through writable BPF ctx->data. This protects entries backed by
> pages that are not private to the sk_msg, such as splice-backed file
> page-cache pages.

Note to other maintainers: please don't commit this yet.
I will send a de-feature for TLS+sockmap to net-next,
if this is in the tree the CI won't ingest it (once CI
goes thru we can merge and fix the conflict).