Security: split proc ptrace checking into read vs. attach

[safe/jmp/linux-2.6] / include / linux / security.h

diff --git a/include/linux/security.h b/include/linux/security.h
index 50737c7..62bd80c 100644 (file)
--- a/include/linux/security.h
+++ b/include/linux/security.h
@@ -46,7 +46,8 @@ struct audit_krule;
  */
 extern int cap_capable(struct task_struct *tsk, int cap);
 extern int cap_settime(struct timespec *ts, struct timezone *tz);
-extern int cap_ptrace(struct task_struct *parent, struct task_struct *child);
+extern int cap_ptrace(struct task_struct *parent, struct task_struct *child,
+                     unsigned int mode);
 extern int cap_capget(struct task_struct *target, kernel_cap_t *effective, kernel_cap_t *inheritable, kernel_cap_t *permitted);
 extern int cap_capset_check(struct task_struct *target, kernel_cap_t *effective, kernel_cap_t *inheritable, kernel_cap_t *permitted);
 extern void cap_capset_set(struct task_struct *target, kernel_cap_t *effective, kernel_cap_t *inheritable, kernel_cap_t *permitted);
@@ -1170,6 +1171,7 @@ static inline void security_free_mnt_opts(struct security_mnt_opts *opts)
  *     attributes would be changed by the execve.
  *     @parent contains the task_struct structure for parent process.
  *     @child contains the task_struct structure for child process.
+ *     @mode contains the PTRACE_MODE flags indicating the form of access.
  *     Return 0 if permission is granted.
  * @capget:
  *     Get the @effective, @inheritable, and @permitted capability sets for
@@ -1295,7 +1297,8 @@ static inline void security_free_mnt_opts(struct security_mnt_opts *opts)
 struct security_operations {
        char name[SECURITY_NAME_MAX + 1];
 
-       int (*ptrace) (struct task_struct *parent, struct task_struct *child);
+       int (*ptrace) (struct task_struct *parent, struct task_struct *child,
+                      unsigned int mode);
        int (*capget) (struct task_struct *target,
                       kernel_cap_t *effective,
                       kernel_cap_t *inheritable, kernel_cap_t *permitted);
@@ -1573,7 +1576,8 @@ extern struct dentry *securityfs_create_dir(const char *name, struct dentry *par
 extern void securityfs_remove(struct dentry *dentry);
 
 /* Security operations */
-int security_ptrace(struct task_struct *parent, struct task_struct *child);
+int security_ptrace(struct task_struct *parent, struct task_struct *child,
+                   unsigned int mode);
 int security_capget(struct task_struct *target,
                    kernel_cap_t *effective,
                    kernel_cap_t *inheritable,
@@ -1755,9 +1759,11 @@ static inline int security_init(void)
        return 0;
 }
 
-static inline int security_ptrace(struct task_struct *parent, struct task_struct *child)
+static inline int security_ptrace(struct task_struct *parent,
+                                 struct task_struct *child,
+                                 unsigned int mode)
 {
-       return cap_ptrace(parent, child);
+       return cap_ptrace(parent, child, mode);
 }
 
 static inline int security_capget(struct task_struct *target,