[PATCH 2/2] tls: return a distinct error for control records from read_sock

[Jakub Kicinski]

On Tue, 22 Sep 2026 15:37:08 +0200 Hannes Reinecke wrote:
> tls_sw_read_sock() leaves a non-data record on the receive list and
> returns -EINVAL. The same function returns -EINVAL when an sk_psock is
> attached, and an actor may return it for other reasons, so callers
> cannot determine whether a control record is waiting.
> 
> Return -EPROTO instead. The record can then be read with recvmsg()
> and a control buffer, which reports its type.

Please run the selftests.
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