Re: [PATCH net-next v2 0/7] net: convert rawv6, ieee802154, phonet and tls getsockopt to sockopt_t

On Mon, Jul 20, 2026 at 09:17:41AM -0700, Breno Leitao wrote:

Now that sockopt_init_user() was already merged, builds a user-backed
sockopt_t from the __user pair. A getsockopt leaf can then take
a sockopt_t behind a thin __user wrapper: the wrapper builds it, calls
the leaf, and writes the length back to optlen. The leaf copies with
copy_to_iter() instead of copy_to_user().

Convert four more leaves the way udp and raw already were: ipv6 raw
(do_rawv6_getsockopt), ieee802154 dgram, phonet pep, and tls
(do_tls_getsockopt and its per-option helpers). 

Converting phonet surfaced a pre-existing bug: pep_getsockopt() clamps the
length it reports but writes a full int with put_user(), overrunning an
optval buffer shorter than sizeof(int). It is fixed in its own patch, with
a Fixes: tag, before the phonet conversion, so it can be backported alone.

The last patch adds getsockopt_iter selftest fixtures for rawv6,
ieee802154, phonet and tls, checking the returned length and errno across
exact, oversized and short buffers, an unknown optname and a bad level.

For full motivation about these changes, please check the initial thread
at link
https://lore.kernel.org/all/20260401-getsockopt-v2-0-611df6771aff@debian.org/#t (local)

Signed-off-by: Breno Leitao <leitao@debian.org>
---
Changes in v2:
- Replace min_t() by umin() (David)
- Link to v1: https://patch.msgid.link/20260716-getsockopt_phase4-v1-0-4f45cb12dce7@debian.org

Other than the nit I mentioned about min vs min_t on the one patch, it looks
good overall to me, so for the series:

Reviewed-by: Joe Damato <redacted>