AF_ALG is a deprecated API only useful for compatibility with existing
userspace.  It has had a lot of vulnerabilities, including the infamous
CopyFail.

Rip out support for offload drivers, which tend to be buggy.  Also rip
out support for AIO, which actually bloats the entire socket subsystem.

Only compile-tested.

Signed-off-by: Demi Marie Obenour <redacted>
---
Demi Marie Obenour (3):
      net: Remove support for AIO on sockets
      AF_ALG: Drop support for off-CPU cryptography
      AF_ALG: Document that it is *always* slower

 Documentation/crypto/userspace-if.rst          | 26 ++++++++--
 crypto/af_alg.c                                | 35 ++------------
 crypto/algif_aead.c                            | 43 ++++-------------
 crypto/algif_hash.c                            |  4 +-
 crypto/algif_rng.c                             |  4 +-
 crypto/algif_skcipher.c                        | 66 ++++++--------------------
 include/crypto/if_alg.h                        | 19 ++++++--
 include/linux/socket.h                         |  1 -
 io_uring/net.c                                 |  1 -
 net/compat.c                                   |  1 -
 net/socket.c                                   |  7 +--
 tools/perf/trace/beauty/include/linux/socket.h |  1 -
 12 files changed, 70 insertions(+), 138 deletions(-)
---
base-commit: 49e05bb00f2e8168695f7af4d694c39e1423e8a2
change-id: 20260502-af-alg-harden-900849451653

Best regards,
-- 
Demi Marie Obenour [off-list ref]