[PATCH] remove duplicated code from proc and ptrace

[linux-2.6-block.git] / fs / proc / base.c

diff --git a/fs/proc/base.c b/fs/proc/base.c
index 24eed139e54ec4fd8c4676264bf0144c650dcb1c..84751f3f52d530e86518247e3cace7d20646ed80 100644 (file)
--- a/fs/proc/base.c
+++ b/fs/proc/base.c
@@ -346,33 +346,6 @@ static int proc_root_link(struct inode *inode, struct dentry **dentry, struct vf
         (task->state == TASK_STOPPED || task->state == TASK_TRACED) && \
         security_ptrace(current,task) == 0))
 
-static int may_ptrace_attach(struct task_struct *task)
-{
-       int retval = 0;
-
-       task_lock(task);
-
-       if (!task->mm)
-               goto out;
-       if (((current->uid != task->euid) ||
-            (current->uid != task->suid) ||
-            (current->uid != task->uid) ||
-            (current->gid != task->egid) ||
-            (current->gid != task->sgid) ||
-            (current->gid != task->gid)) && !capable(CAP_SYS_PTRACE))
-               goto out;
-       rmb();
-       if (task->mm->dumpable != 1 && !capable(CAP_SYS_PTRACE))
-               goto out;
-       if (security_ptrace(current, task))
-               goto out;
-
-       retval = 1;
-out:
-       task_unlock(task);
-       return retval;
-}
-
 static int proc_pid_environ(struct task_struct *task, char * buffer)
 {
        int res = 0;
@@ -382,7 +355,7 @@ static int proc_pid_environ(struct task_struct *task, char * buffer)
                if (len > PAGE_SIZE)
                        len = PAGE_SIZE;
                res = access_process_vm(task, mm->env_start, buffer, len, 0);
-               if (!may_ptrace_attach(task))
+               if (!ptrace_may_attach(task))
                        res = -ESRCH;
                mmput(mm);
        }
@@ -685,7 +658,7 @@ static ssize_t mem_read(struct file * file, char __user * buf,
        int ret = -ESRCH;
        struct mm_struct *mm;
 
-       if (!MAY_PTRACE(task) || !may_ptrace_attach(task))
+       if (!MAY_PTRACE(task) || !ptrace_may_attach(task))
                goto out;
 
        ret = -ENOMEM;
@@ -711,7 +684,7 @@ static ssize_t mem_read(struct file * file, char __user * buf,
 
                this_len = (count > PAGE_SIZE) ? PAGE_SIZE : count;
                retval = access_process_vm(task, src, page, this_len, 0);
-               if (!retval || !MAY_PTRACE(task) || !may_ptrace_attach(task)) {
+               if (!retval || !MAY_PTRACE(task) || !ptrace_may_attach(task)) {
                        if (!ret)
                                ret = -EIO;
                        break;
@@ -749,7 +722,7 @@ static ssize_t mem_write(struct file * file, const char * buf,
        struct task_struct *task = proc_task(file->f_dentry->d_inode);
        unsigned long dst = *ppos;
 
-       if (!MAY_PTRACE(task) || !may_ptrace_attach(task))
+       if (!MAY_PTRACE(task) || !ptrace_may_attach(task))
                return -ESRCH;
 
        page = (char *)__get_free_page(GFP_USER);