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From: Waiman Long <longman@redhat.com>
To: Andrew Morton <akpm@linux-foundation.org>,
	David Howells <dhowells@redhat.com>,
	Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com>,
	James Morris <jmorris@namei.org>,
	"Serge E. Hallyn" <serge@hallyn.com>,
	Linus Torvalds <torvalds@linux-foundation.org>,
	Joe Perches <joe@perches.com>,
	Matthew Wilcox <willy@infradead.org>,
	David Rientjes <rientjes@google.com>
Cc: linux-mm@kvack.org, keyrings@vger.kernel.org,
	linux-kernel@vger.kernel.org, x86@kernel.org,
	linux-crypto@vger.kernel.org, linux-s390@vger.kernel.org,
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	linux-sctp@vger.kernel.org, linux-nfs@vger.kernel.org,
	tipc-discussion@lists.sourceforge.net, cocci@systeme.lip6.fr,
	linux-security-module@vger.kernel.org,
	linux-integrity@vger.kernel.org, Waiman Long <longman@redhat.com>
Subject: [PATCH 0/2] mm, treewide: Rename kzfree() to kfree_sensitive()
Date: Mon, 13 Apr 2020 17:15:48 -0400
Message-ID: <20200413211550.8307-1-longman@redhat.com> (raw)

This patchset makes a global rename of the kzfree() to kfree_sensitive()
to highlight the fact buffer clearing is only needed if the data objects
contain sensitive information like encrpytion key. The fact that kzfree()
uses memset() to do the clearing isn't totally safe either as compiler
may compile out the clearing in their optimizer. Instead, the new
kfree_sensitive() uses memzero_explicit() which won't get compiled out.

Waiman Long (2):
  mm, treewide: Rename kzfree() to kfree_sensitive()
  crypto: Remove unnecessary memzero_explicit()

 arch/s390/crypto/prng.c                       |  4 +--
 arch/x86/power/hibernate.c                    |  2 +-
 crypto/adiantum.c                             |  2 +-
 crypto/ahash.c                                |  4 +--
 crypto/api.c                                  |  2 +-
 crypto/asymmetric_keys/verify_pefile.c        |  4 +--
 crypto/deflate.c                              |  2 +-
 crypto/drbg.c                                 | 10 +++---
 crypto/ecc.c                                  |  8 ++---
 crypto/ecdh.c                                 |  2 +-
 crypto/gcm.c                                  |  2 +-
 crypto/gf128mul.c                             |  4 +--
 crypto/jitterentropy-kcapi.c                  |  2 +-
 crypto/rng.c                                  |  2 +-
 crypto/rsa-pkcs1pad.c                         |  6 ++--
 crypto/seqiv.c                                |  2 +-
 crypto/shash.c                                |  2 +-
 crypto/skcipher.c                             |  2 +-
 crypto/testmgr.c                              |  6 ++--
 crypto/zstd.c                                 |  2 +-
 .../allwinner/sun8i-ce/sun8i-ce-cipher.c      | 17 +++-------
 .../allwinner/sun8i-ss/sun8i-ss-cipher.c      | 18 +++-------
 drivers/crypto/amlogic/amlogic-gxl-cipher.c   | 14 +++-----
 drivers/crypto/atmel-ecc.c                    |  2 +-
 drivers/crypto/caam/caampkc.c                 | 28 +++++++--------
 drivers/crypto/cavium/cpt/cptvf_main.c        |  6 ++--
 drivers/crypto/cavium/cpt/cptvf_reqmanager.c  | 12 +++----
 drivers/crypto/cavium/nitrox/nitrox_lib.c     |  4 +--
 drivers/crypto/cavium/zip/zip_crypto.c        |  6 ++--
 drivers/crypto/ccp/ccp-crypto-rsa.c           |  6 ++--
 drivers/crypto/ccree/cc_aead.c                |  4 +--
 drivers/crypto/ccree/cc_buffer_mgr.c          |  4 +--
 drivers/crypto/ccree/cc_cipher.c              |  6 ++--
 drivers/crypto/ccree/cc_hash.c                |  8 ++---
 drivers/crypto/ccree/cc_request_mgr.c         |  2 +-
 drivers/crypto/inside-secure/safexcel_hash.c  |  3 +-
 drivers/crypto/marvell/cesa/hash.c            |  2 +-
 .../crypto/marvell/octeontx/otx_cptvf_main.c  |  6 ++--
 .../marvell/octeontx/otx_cptvf_reqmgr.h       |  2 +-
 drivers/crypto/mediatek/mtk-aes.c             |  2 +-
 drivers/crypto/nx/nx.c                        |  4 +--
 drivers/crypto/virtio/virtio_crypto_algs.c    | 12 +++----
 drivers/crypto/virtio/virtio_crypto_core.c    |  2 +-
 drivers/md/dm-crypt.c                         | 34 +++++++++----------
 drivers/md/dm-integrity.c                     |  6 ++--
 drivers/misc/ibmvmc.c                         |  6 ++--
 .../hisilicon/hns3/hns3pf/hclge_mbx.c         |  2 +-
 .../net/ethernet/intel/ixgbe/ixgbe_ipsec.c    |  6 ++--
 drivers/net/ppp/ppp_mppe.c                    |  6 ++--
 drivers/net/wireguard/noise.c                 |  4 +--
 drivers/net/wireguard/peer.c                  |  2 +-
 drivers/net/wireless/intel/iwlwifi/pcie/rx.c  |  2 +-
 .../net/wireless/intel/iwlwifi/pcie/tx-gen2.c |  6 ++--
 drivers/net/wireless/intel/iwlwifi/pcie/tx.c  |  6 ++--
 drivers/net/wireless/intersil/orinoco/wext.c  |  4 +--
 drivers/s390/crypto/ap_bus.h                  |  4 +--
 drivers/staging/ks7010/ks_hostif.c            |  2 +-
 drivers/staging/rtl8723bs/core/rtw_security.c |  2 +-
 drivers/staging/wlan-ng/p80211netdev.c        |  2 +-
 drivers/target/iscsi/iscsi_target_auth.c      |  2 +-
 fs/btrfs/ioctl.c                              |  2 +-
 fs/cifs/cifsencrypt.c                         |  2 +-
 fs/cifs/connect.c                             | 10 +++---
 fs/cifs/dfs_cache.c                           |  2 +-
 fs/cifs/misc.c                                |  8 ++---
 fs/crypto/keyring.c                           |  6 ++--
 fs/crypto/keysetup_v1.c                       |  4 +--
 fs/ecryptfs/keystore.c                        |  4 +--
 fs/ecryptfs/messaging.c                       |  2 +-
 include/crypto/aead.h                         |  2 +-
 include/crypto/akcipher.h                     |  2 +-
 include/crypto/gf128mul.h                     |  2 +-
 include/crypto/hash.h                         |  2 +-
 include/crypto/internal/acompress.h           |  2 +-
 include/crypto/kpp.h                          |  2 +-
 include/crypto/skcipher.h                     |  2 +-
 include/linux/slab.h                          |  2 +-
 lib/mpi/mpiutil.c                             |  6 ++--
 lib/test_kasan.c                              |  6 ++--
 mm/slab_common.c                              | 10 +++---
 net/atm/mpoa_caches.c                         |  4 +--
 net/bluetooth/ecdh_helper.c                   |  6 ++--
 net/bluetooth/smp.c                           | 24 ++++++-------
 net/core/sock.c                               |  2 +-
 net/ipv4/tcp_fastopen.c                       |  2 +-
 net/mac80211/aead_api.c                       |  4 +--
 net/mac80211/aes_gmac.c                       |  2 +-
 net/mac80211/key.c                            |  2 +-
 net/mac802154/llsec.c                         | 20 +++++------
 net/sctp/auth.c                               |  2 +-
 net/sctp/socket.c                             |  2 +-
 net/sunrpc/auth_gss/gss_krb5_crypto.c         |  4 +--
 net/sunrpc/auth_gss/gss_krb5_keys.c           |  6 ++--
 net/sunrpc/auth_gss/gss_krb5_mech.c           |  2 +-
 net/tipc/crypto.c                             | 10 +++---
 net/wireless/core.c                           |  2 +-
 net/wireless/ibss.c                           |  4 +--
 net/wireless/lib80211_crypt_tkip.c            |  2 +-
 net/wireless/lib80211_crypt_wep.c             |  2 +-
 net/wireless/nl80211.c                        | 24 ++++++-------
 net/wireless/sme.c                            |  6 ++--
 net/wireless/util.c                           |  2 +-
 net/wireless/wext-sme.c                       |  2 +-
 scripts/coccinelle/free/devm_free.cocci       |  4 +--
 scripts/coccinelle/free/ifnullfree.cocci      |  4 +--
 scripts/coccinelle/free/kfree.cocci           |  6 ++--
 scripts/coccinelle/free/kfreeaddr.cocci       |  2 +-
 security/apparmor/domain.c                    |  4 +--
 security/apparmor/include/file.h              |  2 +-
 security/apparmor/policy.c                    | 24 ++++++-------
 security/apparmor/policy_ns.c                 |  6 ++--
 security/apparmor/policy_unpack.c             | 14 ++++----
 security/keys/big_key.c                       |  6 ++--
 security/keys/dh.c                            | 14 ++++----
 security/keys/encrypted-keys/encrypted.c      | 14 ++++----
 security/keys/trusted-keys/trusted_tpm1.c     | 34 +++++++++----------
 security/keys/user_defined.c                  |  6 ++--
 117 files changed, 332 insertions(+), 358 deletions(-)

-- 
2.18.1


             reply index

Thread overview: 20+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-04-13 21:15 Waiman Long [this message]
2020-04-13 21:15 ` [PATCH 1/2] " Waiman Long
2020-04-14  0:29   ` David Rientjes
2020-04-14  8:32   ` Jason A. Donenfeld
2020-04-14  9:01   ` Michal Hocko
2020-04-14 12:48   ` David Sterba
2020-04-14 18:26     ` Waiman Long
2020-04-15  5:01   ` Johannes Weiner
2020-06-15 18:07   ` Dan Carpenter
2020-06-15 18:39     ` Waiman Long
2020-04-13 21:15 ` [PATCH 2/2] crypto: Remove unnecessary memzero_explicit() Waiman Long
2020-04-13 21:31   ` Joe Perches
2020-04-13 21:52     ` Waiman Long
2020-04-13 22:28 ` [PATCH v2 " Waiman Long
2020-04-14  6:08   ` Christophe Leroy
2020-04-14 16:24     ` Waiman Long
2020-04-14 19:16       ` Michal Suchánek
2020-04-14 19:37         ` Waiman Long
2020-04-14 19:44           ` Joe Perches
2020-04-14 13:06 ` [PATCH 1/2] mm, treewide: Rename kzfree() to kfree_sensitive() David Howells

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