[PATCH 0/6] crypto: add CRYPTO_ALG_ALLOCATES_MEMORY

[Eric Biggers <ebiggers@kernel.org>]

This series introduces a flag that algorithms can set to indicate that
they allocate memory during processing of typical inputs, and thus
shouldn't be used in cases like dm-crypt where memory allocation
failures aren't acceptable.

Compared to Mikulas's patches, I've made the following improvements:

- Tried to clearly document the semantics of
  CRYPTO_ALG_ALLOCATES_MEMORY.  This includes documenting the usage
  constraints, since there are actually lots of cases that were
  overlooked where algorithms can still allocate memory in some edge
  cases where inputs are misaligned, fragemented, etc.  E.g. see
  crypto/skcipher.c and crypto/ahash.c.  Mikulas, please let me know if
  there are any concerns for dm-crypt.

- Moved the common mechanism for inheriting flags to its own patch.

- crypto_grab_spawn() now handles propagating CRYPTO_ALG_INHERITED_FLAGS
  to the new template instance.

- Inherit the flags in various places that were missed.

- Other cleanups.

Note: Mikulas's patch "crypto: set the flag CRYPTO_ALG_ALLOCATES_MEMORY"
still needs to be checked for cases where the flag no longer needs to be
set due to the usage constraints I documented.

Eric Biggers (4):
  crypto: geniv - remove unneeded arguments from aead_geniv_alloc()
  crypto: algapi - use common mechanism for inheriting flags
  crypto: algapi - introduce the flag CRYPTO_ALG_ALLOCATES_MEMORY
  crypto: algapi - remove crypto_check_attr_type()

Mikulas Patocka (2):
  crypto: set the flag CRYPTO_ALG_ALLOCATES_MEMORY
  dm-crypt: don't use drivers that have CRYPTO_ALG_ALLOCATES_MEMORY

 crypto/adiantum.c                             |   4 +-
 crypto/algapi.c                               |  17 +--
 crypto/authenc.c                              |   4 +-
 crypto/authencesn.c                           |   4 +-
 crypto/ccm.c                                  |  23 ++--
 crypto/chacha20poly1305.c                     |   4 +-
 crypto/cmac.c                                 |  15 ++-
 crypto/cryptd.c                               |  59 ++++-----
 crypto/ctr.c                                  |   8 +-
 crypto/cts.c                                  |   3 +-
 crypto/echainiv.c                             |   2 +-
 crypto/essiv.c                                |  11 +-
 crypto/gcm.c                                  |  10 +-
 crypto/geniv.c                                |   9 +-
 crypto/hmac.c                                 |  15 ++-
 crypto/lrw.c                                  |   3 +-
 crypto/pcrypt.c                               |  14 +--
 crypto/rsa-pkcs1pad.c                         |   3 +-
 crypto/seqiv.c                                |   2 +-
 crypto/simd.c                                 |   6 +-
 crypto/skcipher.c                             |   3 +-
 crypto/vmac.c                                 |  15 ++-
 crypto/xcbc.c                                 |  15 ++-
 crypto/xts.c                                  |   3 +-
 .../crypto/allwinner/sun8i-ce/sun8i-ce-core.c |  12 +-
 .../crypto/allwinner/sun8i-ss/sun8i-ss-core.c |  12 +-
 drivers/crypto/amlogic/amlogic-gxl-core.c     |   6 +-
 drivers/crypto/axis/artpec6_crypto.c          |  20 ++-
 drivers/crypto/bcm/cipher.c                   |  72 ++++++++---
 drivers/crypto/caam/caamalg.c                 |   6 +-
 drivers/crypto/caam/caamalg_qi.c              |   6 +-
 drivers/crypto/caam/caamalg_qi2.c             |   8 +-
 drivers/crypto/caam/caamhash.c                |   2 +-
 drivers/crypto/cavium/cpt/cptvf_algs.c        |  18 ++-
 drivers/crypto/cavium/nitrox/nitrox_aead.c    |   4 +-
 .../crypto/cavium/nitrox/nitrox_skcipher.c    |  16 +--
 drivers/crypto/ccp/ccp-crypto-aes-cmac.c      |   1 +
 drivers/crypto/ccp/ccp-crypto-aes-galois.c    |   1 +
 drivers/crypto/ccp/ccp-crypto-aes-xts.c       |   1 +
 drivers/crypto/ccp/ccp-crypto-aes.c           |   2 +
 drivers/crypto/ccp/ccp-crypto-des3.c          |   1 +
 drivers/crypto/ccp/ccp-crypto-sha.c           |   1 +
 drivers/crypto/chelsio/chcr_algo.c            |   7 +-
 drivers/crypto/hisilicon/sec/sec_algs.c       |  24 ++--
 drivers/crypto/hisilicon/sec2/sec_crypto.c    |   4 +-
 .../crypto/inside-secure/safexcel_cipher.c    |  47 +++++++
 drivers/crypto/inside-secure/safexcel_hash.c  |  18 +++
 drivers/crypto/ixp4xx_crypto.c                |   6 +-
 drivers/crypto/marvell/cesa/cipher.c          |  18 ++-
 drivers/crypto/marvell/cesa/hash.c            |   6 +
 .../crypto/marvell/octeontx/otx_cptvf_algs.c  |  30 ++---
 drivers/crypto/n2_core.c                      |   3 +-
 drivers/crypto/picoxcell_crypto.c             |  17 ++-
 drivers/crypto/qat/qat_common/qat_algs.c      |  12 +-
 drivers/crypto/qce/skcipher.c                 |   1 +
 drivers/crypto/talitos.c                      | 117 ++++++++++++------
 drivers/crypto/virtio/virtio_crypto_algs.c    |   3 +-
 drivers/crypto/xilinx/zynqmp-aes-gcm.c        |   1 +
 drivers/md/dm-crypt.c                         |  17 ++-
 include/crypto/algapi.h                       |  23 +++-
 include/crypto/internal/geniv.h               |   2 +-
 include/linux/crypto.h                        |  32 +++++
 62 files changed, 550 insertions(+), 279 deletions(-)

-- 
2.27.0