aboutsummaryrefslogtreecommitdiffstats
path: root/include/linux
diff options
context:
space:
mode:
authorJames Morris <jmorris@namei.org>2009-01-07 09:58:22 +1100
committerJames Morris <jmorris@namei.org>2009-01-07 09:58:22 +1100
commitac8cc0fa5395fe2278e305a4cbed48e90d88d878 (patch)
tree515f577bfddd054ee4373228be7c974dfb8133af /include/linux
parent238c6d54830c624f34ac9cf123ac04aebfca5013 (diff)
parent3699c53c485bf0168e6500d0ed18bf931584dd7c (diff)
downloadmrst-s0i3-test-ac8cc0fa5395fe2278e305a4cbed48e90d88d878.tar.gz
mrst-s0i3-test-ac8cc0fa5395fe2278e305a4cbed48e90d88d878.tar.xz
mrst-s0i3-test-ac8cc0fa5395fe2278e305a4cbed48e90d88d878.zip
Merge branch 'next' into for-linus
Diffstat (limited to 'include/linux')
-rw-r--r--include/linux/capability.h17
-rw-r--r--include/linux/security.h41
2 files changed, 47 insertions, 11 deletions
diff --git a/include/linux/capability.h b/include/linux/capability.h
index e22f48c2a46..02bdb768d43 100644
--- a/include/linux/capability.h
+++ b/include/linux/capability.h
@@ -529,8 +529,21 @@ extern const kernel_cap_t __cap_init_eff_set;
*
* Note that this does not set PF_SUPERPRIV on the task.
*/
-#define has_capability(t, cap) (security_capable((t), (cap)) == 0)
-#define has_capability_noaudit(t, cap) (security_capable_noaudit((t), (cap)) == 0)
+#define has_capability(t, cap) (security_real_capable((t), (cap)) == 0)
+
+/**
+ * has_capability_noaudit - Determine if a task has a superior capability available (unaudited)
+ * @t: The task in question
+ * @cap: The capability to be tested for
+ *
+ * Return true if the specified task has the given superior capability
+ * currently in effect, false if not, but don't write an audit message for the
+ * check.
+ *
+ * Note that this does not set PF_SUPERPRIV on the task.
+ */
+#define has_capability_noaudit(t, cap) \
+ (security_real_capable_noaudit((t), (cap)) == 0)
extern int capable(int cap);
diff --git a/include/linux/security.h b/include/linux/security.h
index b92b5e453f6..1f2ab6353c0 100644
--- a/include/linux/security.h
+++ b/include/linux/security.h
@@ -48,7 +48,8 @@ struct audit_krule;
* These functions are in security/capability.c and are used
* as the default capabilities functions
*/
-extern int cap_capable(struct task_struct *tsk, int cap, int audit);
+extern int cap_capable(struct task_struct *tsk, const struct cred *cred,
+ int cap, int audit);
extern int cap_settime(struct timespec *ts, struct timezone *tz);
extern int cap_ptrace_may_access(struct task_struct *child, unsigned int mode);
extern int cap_ptrace_traceme(struct task_struct *parent);
@@ -1251,9 +1252,12 @@ static inline void security_free_mnt_opts(struct security_mnt_opts *opts)
* @permitted contains the permitted capability set.
* Return 0 and update @new if permission is granted.
* @capable:
- * Check whether the @tsk process has the @cap capability.
+ * Check whether the @tsk process has the @cap capability in the indicated
+ * credentials.
* @tsk contains the task_struct for the process.
+ * @cred contains the credentials to use.
* @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.
* @acct:
* Check permission before enabling or disabling process accounting. If
@@ -1346,7 +1350,8 @@ struct security_operations {
const kernel_cap_t *effective,
const kernel_cap_t *inheritable,
const kernel_cap_t *permitted);
- int (*capable) (struct task_struct *tsk, int cap, int audit);
+ int (*capable) (struct task_struct *tsk, const struct cred *cred,
+ int cap, int audit);
int (*acct) (struct file *file);
int (*sysctl) (struct ctl_table *table, int op);
int (*quotactl) (int cmds, int type, int id, struct super_block *sb);
@@ -1628,8 +1633,9 @@ int security_capset(struct cred *new, const struct cred *old,
const kernel_cap_t *effective,
const kernel_cap_t *inheritable,
const kernel_cap_t *permitted);
-int security_capable(struct task_struct *tsk, int cap);
-int security_capable_noaudit(struct task_struct *tsk, int cap);
+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_acct(struct file *file);
int security_sysctl(struct ctl_table *table, int op);
int security_quotactl(int cmds, int type, int id, struct super_block *sb);
@@ -1826,14 +1832,31 @@ static inline int security_capset(struct cred *new,
return cap_capset(new, old, effective, inheritable, permitted);
}
-static inline int security_capable(struct task_struct *tsk, int cap)
+static inline int security_capable(int cap)
{
- return cap_capable(tsk, cap, SECURITY_CAP_AUDIT);
+ return cap_capable(current, current_cred(), cap, SECURITY_CAP_AUDIT);
}
-static inline int security_capable_noaudit(struct task_struct *tsk, int cap)
+static inline int security_real_capable(struct task_struct *tsk, int cap)
{
- return cap_capable(tsk, cap, SECURITY_CAP_NOAUDIT);
+ int ret;
+
+ rcu_read_lock();
+ ret = cap_capable(tsk, __task_cred(tsk), cap, SECURITY_CAP_AUDIT);
+ rcu_read_unlock();
+ return ret;
+}
+
+static inline
+int security_real_capable_noaudit(struct task_struct *tsk, int cap)
+{
+ int ret;
+
+ rcu_read_lock();
+ ret = cap_capable(tsk, __task_cred(tsk), cap,
+ SECURITY_CAP_NOAUDIT);
+ rcu_read_unlock();
+ return ret;
}
static inline int security_acct(struct file *file)