From: Scott Branden <scott.branden@broadcom.com>
To: Kees Cook <keescook@chromium.org>
Cc: Mimi Zohar <zohar@linux.ibm.com>,
Matthew Wilcox <willy@infradead.org>,
James Morris <jmorris@namei.org>,
Luis Chamberlain <mcgrof@kernel.org>,
Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
"Rafael J. Wysocki" <rafael@kernel.org>,
Alexander Viro <viro@zeniv.linux.org.uk>,
Jessica Yu <jeyu@kernel.org>,
Dmitry Kasatkin <dmitry.kasatkin@gmail.com>,
"Serge E. Hallyn" <serge@hallyn.com>,
Casey Schaufler <casey@schaufler-ca.com>,
"Eric W. Biederman" <ebiederm@xmission.com>,
Peter Zijlstra <peterz@infradead.org>,
Matthew Garrett <matthewgarrett@google.com>,
David Howells <dhowells@redhat.com>,
Mauro Carvalho Chehab <mchehab+huawei@kernel.org>,
Randy Dunlap <rdunlap@infradead.org>,
"Joel Fernandes (Google)" <joel@joelfernandes.org>,
KP Singh <kpsingh@google.com>, Dave Olsthoorn <dave@bewaar.me>,
Hans de Goede <hdegoede@redhat.com>,
Peter Jones <pjones@redhat.com>,
Andrew Morton <akpm@linux-foundation.org>,
Stephen Boyd <stephen.boyd@linaro.org>,
Paul Moore <paul@paul-moore.com>,
Stephen Smalley <stephen.smalley.work@gmail.com>,
linux-security-module@vger.kernel.org,
linux-integrity@vger.kernel.org, selinux@vger.kernel.org,
linux-fsdevel@vger.kernel.org, kexec@lists.infradead.org,
linux-kernel@vger.kernel.org
Subject: Re: [PATCH 06/13] fs/kernel_read_file: Remove redundant size argument
Date: Tue, 21 Jul 2020 14:43:07 -0700 [thread overview]
Message-ID: <ec326654-c43b-259c-409c-63929ad5b217@broadcom.com> (raw)
In-Reply-To: <20200717174309.1164575-7-keescook@chromium.org>
Hi Kees,
On 2020-07-17 10:43 a.m., Kees Cook wrote:
> In preparation for refactoring kernel_read_file*(), remove the redundant
> "size" argument which is not needed: it can be included in the return
> code, with callers adjusted. (VFS reads already cannot be larger than
> INT_MAX.)
>
> Signed-off-by: Kees Cook <keescook@chromium.org>
> ---
> drivers/base/firmware_loader/main.c | 8 ++++----
> fs/kernel_read_file.c | 20 +++++++++-----------
> include/linux/kernel_read_file.h | 8 ++++----
> kernel/kexec_file.c | 13 ++++++-------
> kernel/module.c | 7 +++----
> security/integrity/digsig.c | 5 +++--
> security/integrity/ima/ima_fs.c | 5 +++--
> 7 files changed, 32 insertions(+), 34 deletions(-)
>
> diff --git a/drivers/base/firmware_loader/main.c b/drivers/base/firmware_loader/main.c
> index d4a413ea48ce..ea419c7d3d34 100644
> --- a/drivers/base/firmware_loader/main.c
> +++ b/drivers/base/firmware_loader/main.c
> @@ -462,7 +462,7 @@ fw_get_filesystem_firmware(struct device *device, struct fw_priv *fw_priv,
> size_t in_size,
> const void *in_buffer))
> {
> - loff_t size;
> + size_t size;
> int i, len;
> int rc = -ENOENT;
> char *path;
> @@ -494,10 +494,9 @@ fw_get_filesystem_firmware(struct device *device, struct fw_priv *fw_priv,
> fw_priv->size = 0;
>
> /* load firmware files from the mount namespace of init */
> - rc = kernel_read_file_from_path_initns(path, &buffer,
> - &size, msize,
> + rc = kernel_read_file_from_path_initns(path, &buffer, msize,
> READING_FIRMWARE);
> - if (rc) {
> + if (rc < 0) {
> if (rc != -ENOENT)
> dev_warn(device, "loading %s failed with error %d\n",
> path, rc);
> @@ -506,6 +505,7 @@ fw_get_filesystem_firmware(struct device *device, struct fw_priv *fw_priv,
> path);
> continue;
> }
> + size = rc;
Change fails to return 0. Need rc = 0; here.
> dev_dbg(device, "Loading firmware from %s\n", path);
> if (decompress) {
> dev_dbg(device, "f/w decompressing %s\n",
>
next prev parent reply other threads:[~2020-07-21 21:43 UTC|newest]
Thread overview: 27+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-07-17 17:42 [PATCH 00/13] Introduce partial kernel_read_file() support Kees Cook
2020-07-17 17:42 ` [PATCH 01/13] firmware_loader: EFI firmware loader must handle pre-allocated buffer Kees Cook
2020-07-17 19:08 ` Scott Branden
2020-07-17 17:42 ` [PATCH 02/13] fs/kernel_read_file: Remove FIRMWARE_PREALLOC_BUFFER enum Kees Cook
2020-07-17 19:09 ` Scott Branden
2020-07-17 17:42 ` [PATCH 03/13] fs/kernel_read_file: Remove FIRMWARE_EFI_EMBEDDED enum Kees Cook
2020-07-17 19:10 ` Scott Branden
2020-07-17 17:42 ` [PATCH 04/13] fs/kernel_read_file: Split into separate include file Kees Cook
2020-07-17 17:43 ` [PATCH 05/13] fs/kernel_read_file: Split into separate source file Kees Cook
2020-07-17 19:11 ` Scott Branden
2020-07-17 17:43 ` [PATCH 06/13] fs/kernel_read_file: Remove redundant size argument Kees Cook
2020-07-17 19:04 ` Scott Branden
2020-07-17 19:55 ` Scott Branden
2020-07-17 22:06 ` Kees Cook
2020-07-18 5:44 ` Scott Branden
2020-07-21 21:43 ` Scott Branden [this message]
2020-07-21 21:50 ` Kees Cook
2020-07-17 17:43 ` [PATCH 07/13] fs/kernel_read_file: Switch buffer size arg to size_t Kees Cook
2020-07-20 8:34 ` David Laight
2020-07-17 17:43 ` [PATCH 08/13] fs/kernel_read_file: Add file_size output argument Kees Cook
2020-07-17 17:43 ` [PATCH 09/13] LSM: Introduce kernel_post_load_data() hook Kees Cook
2020-07-17 17:43 ` [PATCH 10/13] firmware_loader: Use security_post_load_data() Kees Cook
2020-07-17 17:43 ` [PATCH 11/13] module: Call security_kernel_post_load_data() Kees Cook
2020-07-17 17:43 ` [PATCH 12/13] LSM: Add "contents" flag to kernel_read_file hook Kees Cook
2020-07-17 17:43 ` [PATCH 13/13] fs/kernel_file_read: Add "offset" arg for partial reads Kees Cook
2020-07-17 19:17 ` [PATCH 00/13] Introduce partial kernel_read_file() support Scott Branden
2020-07-17 22:10 ` Kees Cook
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