453431a549
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> |
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|---|---|---|
| .. | ||
| internal | ||
| acompress.h | ||
| aead.h | ||
| aes.h | ||
| akcipher.h | ||
| algapi.h | ||
| arc4.h | ||
| asym_tpm_subtype.h | ||
| authenc.h | ||
| b128ops.h | ||
| blake2s.h | ||
| blowfish.h | ||
| cast5.h | ||
| cast6.h | ||
| cast_common.h | ||
| cbc.h | ||
| chacha.h | ||
| chacha20poly1305.h | ||
| cryptd.h | ||
| ctr.h | ||
| curve25519.h | ||
| des.h | ||
| dh.h | ||
| drbg.h | ||
| ecdh.h | ||
| engine.h | ||
| gcm.h | ||
| gf128mul.h | ||
| ghash.h | ||
| hash.h | ||
| hash_info.h | ||
| hmac.h | ||
| if_alg.h | ||
| kpp.h | ||
| md5.h | ||
| nhpoly1305.h | ||
| null.h | ||
| padlock.h | ||
| pcrypt.h | ||
| pkcs7.h | ||
| poly1305.h | ||
| public_key.h | ||
| rng.h | ||
| scatterwalk.h | ||
| serpent.h | ||
| sha.h | ||
| sha1_base.h | ||
| sha3.h | ||
| sha256_base.h | ||
| sha512_base.h | ||
| skcipher.h | ||
| sm3.h | ||
| sm3_base.h | ||
| sm4.h | ||
| streebog.h | ||
| twofish.h | ||
| xts.h | ||