From: trix@redhat.com To: dhowells@redhat.com, jarkko.sakkinen@linux.intel.com, jmorris@namei.org, serge@hallyn.com, denkenz@gmail.com, marcel@holtmann.org Cc: keyrings@vger.kernel.org, linux-security-module@vger.kernel.org, linux-kernel@vger.kernel.org, Tom Rix <trix@redhat.com> Subject: [PATCH] KEYS: remove redundant memsets Date: Tue, 21 Jul 2020 14:15:16 +0000 [thread overview] Message-ID: <20200721141516.20335-1-trix@redhat.com> (raw) From: Tom Rix <trix@redhat.com> Reviewing use of memset in keyctrl_pkey.c keyctl_pkey_params_get prologue code to set params up memset(params, 0, sizeof(*params)); params->encoding = "raw"; keyctl_pkey_params_get_2 and keyctl_pkey_query have the same prologue and they call keyctl_pkey_params_get. So remove the prologue from the callers. In keyctl_pkey_params_get_2, reorder the copy_from_user of uparams to closer to it's use to ensure that the keyctrl_pkey_params_get is called first. Fixes: 00d60fd3b932 ("KEYS: Provide keyctls to drive the new key type ops for asymmetric keys [ver #2]") Signed-off-by: Tom Rix <trix@redhat.com> --- security/keys/keyctl_pkey.c | 11 +++-------- 1 file changed, 3 insertions(+), 8 deletions(-) diff --git a/security/keys/keyctl_pkey.c b/security/keys/keyctl_pkey.c index 931d8dfb4a7f..60b504681388 100644 --- a/security/keys/keyctl_pkey.c +++ b/security/keys/keyctl_pkey.c @@ -119,12 +119,6 @@ static int keyctl_pkey_params_get_2(const struct keyctl_pkey_params __user *_par struct kernel_pkey_query info; int ret; - memset(params, 0, sizeof(*params)); - params->encoding = "raw"; - - if (copy_from_user(&uparams, _params, sizeof(uparams)) != 0) - return -EFAULT; - ret = keyctl_pkey_params_get(uparams.key_id, _info, params); if (ret < 0) return ret; @@ -133,6 +127,9 @@ static int keyctl_pkey_params_get_2(const struct keyctl_pkey_params __user *_par if (ret < 0) return ret; + if (copy_from_user(&uparams, _params, sizeof(uparams)) != 0) + return -EFAULT; + switch (op) { case KEYCTL_PKEY_ENCRYPT: case KEYCTL_PKEY_DECRYPT: @@ -166,8 +163,6 @@ long keyctl_pkey_query(key_serial_t id, struct kernel_pkey_query res; long ret; - memset(¶ms, 0, sizeof(params)); - ret = keyctl_pkey_params_get(id, _info, ¶ms); if (ret < 0) goto error; -- 2.18.1
WARNING: multiple messages have this Message-ID (diff)
From: trix@redhat.com To: dhowells@redhat.com, jarkko.sakkinen@linux.intel.com, jmorris@namei.org, serge@hallyn.com, denkenz@gmail.com, marcel@holtmann.org Cc: keyrings@vger.kernel.org, linux-security-module@vger.kernel.org, linux-kernel@vger.kernel.org, Tom Rix <trix@redhat.com> Subject: [PATCH] KEYS: remove redundant memsets Date: Tue, 21 Jul 2020 07:15:16 -0700 [thread overview] Message-ID: <20200721141516.20335-1-trix@redhat.com> (raw) From: Tom Rix <trix@redhat.com> Reviewing use of memset in keyctrl_pkey.c keyctl_pkey_params_get prologue code to set params up memset(params, 0, sizeof(*params)); params->encoding = "raw"; keyctl_pkey_params_get_2 and keyctl_pkey_query have the same prologue and they call keyctl_pkey_params_get. So remove the prologue from the callers. In keyctl_pkey_params_get_2, reorder the copy_from_user of uparams to closer to it's use to ensure that the keyctrl_pkey_params_get is called first. Fixes: 00d60fd3b932 ("KEYS: Provide keyctls to drive the new key type ops for asymmetric keys [ver #2]") Signed-off-by: Tom Rix <trix@redhat.com> --- security/keys/keyctl_pkey.c | 11 +++-------- 1 file changed, 3 insertions(+), 8 deletions(-) diff --git a/security/keys/keyctl_pkey.c b/security/keys/keyctl_pkey.c index 931d8dfb4a7f..60b504681388 100644 --- a/security/keys/keyctl_pkey.c +++ b/security/keys/keyctl_pkey.c @@ -119,12 +119,6 @@ static int keyctl_pkey_params_get_2(const struct keyctl_pkey_params __user *_par struct kernel_pkey_query info; int ret; - memset(params, 0, sizeof(*params)); - params->encoding = "raw"; - - if (copy_from_user(&uparams, _params, sizeof(uparams)) != 0) - return -EFAULT; - ret = keyctl_pkey_params_get(uparams.key_id, _info, params); if (ret < 0) return ret; @@ -133,6 +127,9 @@ static int keyctl_pkey_params_get_2(const struct keyctl_pkey_params __user *_par if (ret < 0) return ret; + if (copy_from_user(&uparams, _params, sizeof(uparams)) != 0) + return -EFAULT; + switch (op) { case KEYCTL_PKEY_ENCRYPT: case KEYCTL_PKEY_DECRYPT: @@ -166,8 +163,6 @@ long keyctl_pkey_query(key_serial_t id, struct kernel_pkey_query res; long ret; - memset(¶ms, 0, sizeof(params)); - ret = keyctl_pkey_params_get(id, _info, ¶ms); if (ret < 0) goto error; -- 2.18.1
next reply other threads:[~2020-07-21 14:15 UTC|newest] Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top 2020-07-21 14:15 trix [this message] 2020-07-21 14:15 ` [PATCH] KEYS: remove redundant memsets trix 2020-07-22 6:42 ` kernel test robot 2020-07-22 6:42 ` kernel test robot 2020-07-22 6:42 ` kernel test robot 2020-07-22 8:01 ` David Howells 2020-07-22 8:01 ` David Howells
Reply instructions: You may reply publicly to this message via plain-text email using any one of the following methods: * Save the following mbox file, import it into your mail client, and reply-to-all from there: mbox Avoid top-posting and favor interleaved quoting: https://en.wikipedia.org/wiki/Posting_style#Interleaved_style * Reply using the --to, --cc, and --in-reply-to switches of git-send-email(1): git send-email \ --in-reply-to=20200721141516.20335-1-trix@redhat.com \ --to=trix@redhat.com \ --cc=denkenz@gmail.com \ --cc=dhowells@redhat.com \ --cc=jarkko.sakkinen@linux.intel.com \ --cc=jmorris@namei.org \ --cc=keyrings@vger.kernel.org \ --cc=linux-kernel@vger.kernel.org \ --cc=linux-security-module@vger.kernel.org \ --cc=marcel@holtmann.org \ --cc=serge@hallyn.com \ /path/to/YOUR_REPLY https://kernel.org/pub/software/scm/git/docs/git-send-email.html * If your mail client supports setting the In-Reply-To header via mailto: links, try the mailto: linkBe sure your reply has a Subject: header at the top and a blank line before the message body.
This is an external index of several public inboxes, see mirroring instructions on how to clone and mirror all data and code used by this external index.