linux-stable/drivers/crypto/nx
Waiman Long 453431a549 mm, treewide: rename kzfree() to kfree_sensitive()
As said by Linus:

  A symmetric naming is only helpful if it implies symmetries in use.
  Otherwise it's actively misleading.

  In "kzalloc()", the z is meaningful and an important part of what the
  caller wants.

  In "kzfree()", the z is actively detrimental, because maybe in the
  future we really _might_ want to use that "memfill(0xdeadbeef)" or
  something. The "zero" part of the interface isn't even _relevant_.

The main reason that kzfree() exists is to clear sensitive information
that should not be leaked to other future users of the same memory
objects.

Rename kzfree() to kfree_sensitive() to follow the example of the recently
added kvfree_sensitive() and make the intention of the API more explicit.
In addition, memzero_explicit() is used to clear the memory to make sure
that it won't get optimized away by the compiler.

The renaming is done by using the command sequence:

  git grep -w --name-only kzfree |\
  xargs sed -i 's/kzfree/kfree_sensitive/'

followed by some editing of the kfree_sensitive() kerneldoc and adding
a kzfree backward compatibility macro in slab.h.

[akpm@linux-foundation.org: fs/crypto/inline_crypt.c needs linux/slab.h]
[akpm@linux-foundation.org: fix fs/crypto/inline_crypt.c some more]

Suggested-by: Joe Perches <joe@perches.com>
Signed-off-by: Waiman Long <longman@redhat.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Acked-by: David Howells <dhowells@redhat.com>
Acked-by: Michal Hocko <mhocko@suse.com>
Acked-by: Johannes Weiner <hannes@cmpxchg.org>
Cc: Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com>
Cc: James Morris <jmorris@namei.org>
Cc: "Serge E. Hallyn" <serge@hallyn.com>
Cc: Joe Perches <joe@perches.com>
Cc: Matthew Wilcox <willy@infradead.org>
Cc: David Rientjes <rientjes@google.com>
Cc: Dan Carpenter <dan.carpenter@oracle.com>
Cc: "Jason A . Donenfeld" <Jason@zx2c4.com>
Link: http://lkml.kernel.org/r/20200616154311.12314-3-longman@redhat.com
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2020-08-07 11:33:22 -07:00
..
Kconfig treewide: Add SPDX license identifier - Makefile/Kconfig 2019-05-21 10:50:46 +02:00
Makefile crypto/nx: Rename nx-842-powernv file name to nx-common-powernv 2020-04-20 16:53:14 +10:00
nx-842-pseries.c locking/atomic, crypto/nx: Remove redundant casts 2019-06-03 12:32:57 +02:00
nx-842.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 157 2019-05-30 11:26:37 -07:00
nx-842.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
nx-aes-cbc.c crypto: nx - convert AES-CBC to skcipher API 2019-10-23 19:46:59 +11:00
nx-aes-ccm.c crypto: nx - remove stale comment referring to the blkcipher walk API 2019-11-17 09:02:49 +08:00
nx-aes-ctr.c crypto: nx - convert AES-CTR to skcipher API 2019-10-23 19:47:00 +11:00
nx-aes-ecb.c crypto: nx - convert AES-ECB to skcipher API 2019-10-23 19:46:59 +11:00
nx-aes-gcm.c crypto: nx - remove stale comment referring to the blkcipher walk API 2019-11-17 09:02:49 +08:00
nx-aes-xcbc.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 299 2019-06-05 17:36:59 +02:00
nx-common-powernv.c crypto/nx: Remove 'pid' in vas_tx_win_attr struct 2020-04-20 16:53:14 +10:00
nx-sha256.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 299 2019-06-05 17:36:59 +02:00
nx-sha512.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 299 2019-06-05 17:36:59 +02:00
nx.c mm, treewide: rename kzfree() to kfree_sensitive() 2020-08-07 11:33:22 -07:00
nx.h crypto: Replace zero-length array with flexible-array member 2020-03-06 12:28:21 +11:00
nx_csbcpb.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
nx_debugfs.c crypto: nx - Improve debugfs_create_u{32,64}() handling for atomics 2019-10-26 02:09:59 +11:00