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| author | Eric W. Biederman <ebiederm@xmission.com> | 2015-05-09 22:09:14 -0500 |
|---|---|---|
| committer | Eric W. Biederman <ebiederm@xmission.com> | 2015-07-01 10:36:39 -0500 |
| commit | f9bd6733d3f11e24f3949becf277507d422ee1eb (patch) | |
| tree | 79d33823e26cb5be0af93bae37b2abca3fdaa5dc /kernel | |
| parent | fbabfd0f4ee2e8847bf56edf481249ad1bb8c44d (diff) | |
| download | lwn-f9bd6733d3f11e24f3949becf277507d422ee1eb.tar.gz lwn-f9bd6733d3f11e24f3949becf277507d422ee1eb.zip | |
sysctl: Allow creating permanently empty directories that serve as mountpoints.
Add a magic sysctl table sysctl_mount_point that when used to
create a directory forces that directory to be permanently empty.
Update the code to use make_empty_dir_inode when accessing permanently
empty directories.
Update the code to not allow adding to permanently empty directories.
Update /proc/sys/fs/binfmt_misc to be a permanently empty directory.
Cc: stable@vger.kernel.org
Signed-off-by: "Eric W. Biederman" <ebiederm@xmission.com>
Diffstat (limited to 'kernel')
| -rw-r--r-- | kernel/sysctl.c | 8 |
1 files changed, 1 insertions, 7 deletions
diff --git a/kernel/sysctl.c b/kernel/sysctl.c index 2082b1a88fb9..c3eee4c6d6c1 100644 --- a/kernel/sysctl.c +++ b/kernel/sysctl.c @@ -1531,12 +1531,6 @@ static struct ctl_table vm_table[] = { { } }; -#if defined(CONFIG_BINFMT_MISC) || defined(CONFIG_BINFMT_MISC_MODULE) -static struct ctl_table binfmt_misc_table[] = { - { } -}; -#endif - static struct ctl_table fs_table[] = { { .procname = "inode-nr", @@ -1690,7 +1684,7 @@ static struct ctl_table fs_table[] = { { .procname = "binfmt_misc", .mode = 0555, - .child = binfmt_misc_table, + .child = sysctl_mount_point, }, #endif { |