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security: remove unused security_sysctl hook

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The only user for this hook was selinux. sysctl routes every call
through /proc/sys/. Selinux and other security modules use the file
system checks for sysctl too, so no need for this hook any more.

Signed-off-by: Lucian Adrian Grijincu <lucian.grijincu@gmail.com>
Signed-off-by: Eric Paris <eparis@redhat.com>
This commit is contained in:
Lucian Adrian Grijincu 2011-02-01 18:44:56 +02:00 committed by Eric Paris
parent 8e6c96935f
commit 4916ca401e
4 changed files with 0 additions and 29 deletions
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13
include/linux/security.h
View File

@ -1259,12 +1259,6 @@ static inline void security_free_mnt_opts(struct security_mnt_opts *opts)
* @cap contains the capability <include/linux/capability.h>.
* @audit: Whether to write an audit message or not
* Return 0 if the capability is granted for @tsk.
* @sysctl:
* Check permission before accessing the @table sysctl variable in the
* manner specified by @op.
* @table contains the ctl_table structure for the sysctl variable.
* @op contains the operation (001 = search, 002 = write, 004 = read).
* Return 0 if permission is granted.
* @syslog:
* Check permission before accessing the kernel message ring or changing
* logging to the console.
@ -1385,7 +1379,6 @@ struct security_operations {
const kernel_cap_t *permitted);
int (*capable) (struct task_struct *tsk, const struct cred *cred,
int cap, int audit);
int (*sysctl) (struct ctl_table *table, int op);
int (*quotactl) (int cmds, int type, int id, struct super_block *sb);
int (*quota_on) (struct dentry *dentry);
int (*syslog) (int type);
@ -1668,7 +1661,6 @@ int security_capset(struct cred *new, const struct cred *old,
int security_capable(int cap);
int security_real_capable(struct task_struct *tsk, int cap);
int security_real_capable_noaudit(struct task_struct *tsk, int cap);
int security_sysctl(struct ctl_table *table, int op);
int security_quotactl(int cmds, int type, int id, struct super_block *sb);
int security_quota_on(struct dentry *dentry);
int security_syslog(int type);
@ -1887,11 +1879,6 @@ int security_real_capable_noaudit(struct task_struct *tsk, int cap)
return ret;
}
static inline int security_sysctl(struct ctl_table *table, int op)
{
return 0;
}
static inline int security_quotactl(int cmds, int type, int id,
struct super_block *sb)
{

5
kernel/sysctl.c
View File

@ -1691,13 +1691,8 @@ static int test_perm(int mode, int op)
int sysctl_perm(struct ctl_table_root *root, struct ctl_table *table, int op)
{
int error;
int mode;
error = security_sysctl(table, op & (MAY_READ | MAY_WRITE | MAY_EXEC));
if (error)
return error;
if (root->permissions)
mode = root->permissions(root, current->nsproxy, table);
else

6
security/capability.c
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@ -12,11 +12,6 @@
#include <linux/security.h>
static int cap_sysctl(ctl_table *table, int op)
{
return 0;
}
static int cap_syslog(int type)
{
return 0;
@ -881,7 +876,6 @@ void __init security_fixup_ops(struct security_operations *ops)
set_to_cap_if_null(ops, capable);
set_to_cap_if_null(ops, quotactl);
set_to_cap_if_null(ops, quota_on);
set_to_cap_if_null(ops, sysctl);
set_to_cap_if_null(ops, syslog);
set_to_cap_if_null(ops, settime);
set_to_cap_if_null(ops, vm_enough_memory);

5
security/security.c
View File

@ -182,11 +182,6 @@ int security_real_capable_noaudit(struct task_struct *tsk, int cap)
return ret;
}
int security_sysctl(struct ctl_table *table, int op)
{
return security_ops->sysctl(table, op);
}
int security_quotactl(int cmds, int type, int id, struct super_block *sb)
{
return security_ops->quotactl(cmds, type, id, sb);