Merge branch 'more-gen_loader-fixes'

Daniel Borkmann says:

====================
More gen_loader fixes

Follow-up fixes for the signed loader, includes also the recent
sashiko findings.

v1->v2:
  - Fixed up verifier_map_ptr selftest
  - Added patch 1/2/6/7 with a new map-in-map fix and a
    redundant hash_buf memcpy cleanup as well as selftests
====================

Link: https://patch.msgid.link/20260601150248.394863-1-daniel@iogearbox.net
Signed-off-by: Alexei Starovoitov <ast@kernel.org>