From: Kees Cook <keescook@chromium•org>
To: Luis Chamberlain <mcgrof@kernel•org>
Cc: jack@suse•cz, rafael@kernel•org, airlied@linux•ie,
amir73il@gmail•com, clemens@ladisch•de,
dri-devel@lists•freedesktop.org, joseph.qi@linux•alibaba.com,
sfr@canb•auug.org.au, mark@fasheh•com, rdna@fb•com,
yzaikin@google•com, joonas.lahtinen@linux•intel.com,
arnd@arndb•de, intel-gfx@lists•freedesktop.org,
jani.nikula@linux•intel.com, julia.lawall@lip6•fr,
jlbec@evilplan•org, rodrigo.vivi@intel•com,
nixiaoming@huawei•com, vbabka@suse•cz, axboe@kernel•dk,
tytso@mit•edu, gregkh@linuxfoundation•org,
linux-kernel@vger•kernel.org, ebiederm@xmission•com,
daniel@ffwll•ch, akpm@linux-foundation•org,
linuxppc-dev@lists•ozlabs.org, ocfs2-devel@oss•oracle.com,
viro@zeniv•linux.org.uk
Subject: Re: [PATCH 13/13] fs: move binfmt_misc sysctl to its own file
Date: Fri, 29 May 2020 01:14:50 -0700 [thread overview]
Message-ID: <202005290113.53AEED2176@keescook> (raw)
In-Reply-To: <20200529074108.16928-14-mcgrof@kernel.org>
On Fri, May 29, 2020 at 07:41:08AM +0000, Luis Chamberlain wrote:
> This moves the binfmt_misc sysctl to its own file to help remove
> clutter from kernel/sysctl.c.
>
> Signed-off-by: Luis Chamberlain <mcgrof@kernel•org>
> ---
> fs/binfmt_misc.c | 1 +
> kernel/sysctl.c | 7 -------
> 2 files changed, 1 insertion(+), 7 deletions(-)
>
> diff --git a/fs/binfmt_misc.c b/fs/binfmt_misc.c
> index f69a043f562b..656b3f5f3bbf 100644
> --- a/fs/binfmt_misc.c
> +++ b/fs/binfmt_misc.c
> @@ -821,6 +821,7 @@ static int __init init_misc_binfmt(void)
> int err = register_filesystem(&bm_fs_type);
> if (!err)
> insert_binfmt(&misc_format);
> + register_sysctl_empty_subdir("fs", "binfmt_misc");
> return err;
Nit: let's make the dir before registering the filesystem. I can't
imagine a realistic situation where userspace is reacting so fast it
would actually fail to mount the fs on /proc/sys/fs/binfmt_misc, but why
risk it?
-Kees
> }
>
> diff --git a/kernel/sysctl.c b/kernel/sysctl.c
> index 460532cd5ac8..7714e7b476c2 100644
> --- a/kernel/sysctl.c
> +++ b/kernel/sysctl.c
> @@ -3042,13 +3042,6 @@ static struct ctl_table fs_table[] = {
> .extra1 = SYSCTL_ZERO,
> .extra2 = SYSCTL_TWO,
> },
> -#if defined(CONFIG_BINFMT_MISC) || defined(CONFIG_BINFMT_MISC_MODULE)
> - {
> - .procname = "binfmt_misc",
> - .mode = 0555,
> - .child = sysctl_mount_point,
> - },
> -#endif
> {
> .procname = "pipe-max-size",
> .data = &pipe_max_size,
> --
> 2.26.2
>
--
Kees Cook
next prev parent reply other threads:[~2020-05-29 8:17 UTC|newest]
Thread overview: 32+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-05-29 7:40 [PATCH 00/13] sysctl: spring cleaning Luis Chamberlain
2020-05-29 7:40 ` [PATCH 01/13] sysctl: add new register_sysctl_subdir() helper Luis Chamberlain
2020-05-29 8:13 ` Jani Nikula
2020-05-29 12:16 ` Luis Chamberlain
2020-05-29 12:40 ` Eric W. Biederman
2020-05-29 12:42 ` Eric W. Biederman
2020-05-29 7:40 ` [PATCH 02/13] cdrom: use new sysctl subdir helper register_sysctl_subdir() Luis Chamberlain
2020-05-29 12:46 ` Eric W. Biederman
2020-05-29 7:40 ` [PATCH 03/13] hpet: " Luis Chamberlain
2020-05-29 7:40 ` [PATCH 04/13] i915: " Luis Chamberlain
2020-05-29 7:41 ` [PATCH 05/13] macintosh/mac_hid.c: " Luis Chamberlain
2020-05-29 7:41 ` [PATCH 06/13] ocfs2: " Luis Chamberlain
2020-05-29 8:23 ` Kees Cook
2020-05-29 11:49 ` [Intel-gfx] " Luis Chamberlain
2020-05-29 14:49 ` Kees Cook
2020-05-29 7:41 ` [PATCH 07/13] test_sysctl: " Luis Chamberlain
2020-05-29 7:41 ` [PATCH 08/13] inotify: simplify sysctl declaration with register_sysctl_subdir() Luis Chamberlain
2020-05-29 7:41 ` [PATCH 09/13] firmware_loader: " Luis Chamberlain
2020-05-29 10:26 ` Greg KH
2020-05-29 11:59 ` Xiaoming Ni
2020-05-29 12:09 ` Luis Chamberlain
2020-05-29 7:41 ` [PATCH 10/13] eventpoll: " Luis Chamberlain
2020-05-29 7:41 ` [PATCH 11/13] random: " Luis Chamberlain
2020-05-29 10:26 ` Greg KH
2020-05-29 12:09 ` Xiaoming Ni
2020-05-29 7:41 ` [PATCH 12/13] sysctl: add helper to register empty subdir Luis Chamberlain
2020-05-29 8:15 ` Kees Cook
2020-05-29 13:03 ` Eric W. Biederman
2021-11-17 3:30 ` Luis Chamberlain
2020-05-29 7:41 ` [PATCH 13/13] fs: move binfmt_misc sysctl to its own file Luis Chamberlain
2020-05-29 8:14 ` Kees Cook [this message]
2020-06-04 8:45 ` Xiaoming Ni
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