59 	struct task_struct *task = inode->u.proc_i.task;  in proc_exe_link()  local
61 	task_lock(task);  in proc_exe_link()
62 	mm = task->mm;  in proc_exe_link()
65 	task_unlock(task);  in proc_exe_link()
90 	task_lock(inode->u.proc_i.task);  in proc_cwd_link()
91 	fs = inode->u.proc_i.task->fs;  in proc_cwd_link()
94 	task_unlock(inode->u.proc_i.task);  in proc_cwd_link()
110 	task_lock(inode->u.proc_i.task);  in proc_root_link()
111 	fs = inode->u.proc_i.task->fs;  in proc_root_link()
114 	task_unlock(inode->u.proc_i.task);  in proc_root_link()
126 #define MAY_PTRACE(task) \  argument
127 	(task == current || \
128 	(task->p_pptr == current && \
129 	(task->ptrace & PT_PTRACED) && task->state == TASK_STOPPED))
131 static int may_ptrace_attach(struct task_struct *task)  in may_ptrace_attach()  argument
135 	task_lock(task);  in may_ptrace_attach()
137 	if (((current->uid != task->euid) ||  in may_ptrace_attach()
138 	    (current->uid != task->suid) ||  in may_ptrace_attach()
139 	    (current->uid != task->uid) ||  in may_ptrace_attach()
140 	    (current->gid != task->egid) ||  in may_ptrace_attach()
141 	    (current->gid != task->sgid) ||  in may_ptrace_attach()
142 	    (!cap_issubset(task->cap_permitted, current->cap_permitted)) ||  in may_ptrace_attach()
143 	    (current->gid != task->gid)) && !capable(CAP_SYS_PTRACE))  in may_ptrace_attach()
146 	if (!is_dumpable(task) && !capable(CAP_SYS_PTRACE))  in may_ptrace_attach()
152 	task_unlock(task);  in may_ptrace_attach()
156 static int proc_pid_environ(struct task_struct *task, char * buffer)  in proc_pid_environ()  argument
161 	if (!may_ptrace_attach(task))  in proc_pid_environ()
164 	task_lock(task);  in proc_pid_environ()
165 	mm = task->mm;  in proc_pid_environ()
168 	task_unlock(task);  in proc_pid_environ()
173 		res = access_process_vm(task, mm->env_start, buffer, len, 0);  in proc_pid_environ()
174 		if (res >= 0 && !may_ptrace_attach(task))  in proc_pid_environ()
182 static int proc_pid_cmdline(struct task_struct *task, char * buffer)  in proc_pid_cmdline()  argument
186 	task_lock(task);  in proc_pid_cmdline()
187 	mm = task->mm;  in proc_pid_cmdline()
194 	task_unlock(task);  in proc_pid_cmdline()
199 		res = access_process_vm(task, mm->arg_start, buffer, len, 0);  in proc_pid_cmdline()
211 				res += access_process_vm(task, mm->env_start, buffer+res, len, 0);  in proc_pid_cmdline()
278 	struct task_struct *task = inode->u.proc_i.task;  in maps_open()  local
282 		m->private = task;  in maps_open()
297 	struct task_struct *task = inode->u.proc_i.task;  in mounts_open()  local
303 		task_lock(task);  in mounts_open()
304 		namespace = task->namespace;  in mounts_open()
307 		task_unlock(task);  in mounts_open()
343 	struct task_struct *task = inode->u.proc_i.task;  in proc_info_read()  local
351 	length = inode->u.proc_i.op.proc_read(task, (char*)page);  in proc_info_read()
384 	struct task_struct *task = file->f_dentry->d_inode->u.proc_i.task;  in mem_read()  local
390 	if (!MAY_PTRACE(task) || !may_ptrace_attach(task))  in mem_read()
397 	task_lock(task);  in mem_read()
398 	mm = task->mm;  in mem_read()
401 	task_unlock(task);  in mem_read()
417 		retval = access_process_vm(task, src, page, this_len, 0);  in mem_read()
418 		if (!retval || !MAY_PTRACE(task) || !may_ptrace_attach(task)) {  in mem_read()
449 	struct task_struct *task = file->f_dentry->d_inode->u.proc_i.task;  in mem_write()  local
452 	if (!MAY_PTRACE(task) || !may_ptrace_attach(task))  in mem_write()
467 		retval = access_process_vm(task, dst, page, this_len, 1);  in mem_write()
636 	struct task_struct *p = inode->u.proc_i.task;  in proc_readfd()
704 	pid = inode->u.proc_i.task->pid;  in proc_base_readdir()
739 static int task_dumpable(struct task_struct *task)  in task_dumpable()  argument
743 	task_lock(task);  in task_dumpable()
744 	retval = is_dumpable(task);  in task_dumpable()
745 	task_unlock(task);  in task_dumpable()
750 static struct inode *proc_pid_make_inode(struct super_block * sb, struct task_struct *task, int ino)  in proc_pid_make_inode()  argument
763 	inode->i_ino = fake_ino(task->pid, ino);  in proc_pid_make_inode()
765 	if (!task->pid)  in proc_pid_make_inode()
771 	get_task_struct(task);  in proc_pid_make_inode()
772 	inode->u.proc_i.task = task;  in proc_pid_make_inode()
775 	if (ino == PROC_PID_INO || task_dumpable(task)) {  in proc_pid_make_inode()
776 		inode->i_uid = task->euid;  in proc_pid_make_inode()
777 		inode->i_gid = task->egid;  in proc_pid_make_inode()
803 	if (dentry->d_inode->u.proc_i.task->pid)  in pid_base_revalidate()
837 	struct task_struct *task = dir->u.proc_i.task;  in proc_lookupfd()  local
859 	inode = proc_pid_make_inode(dir->i_sb, task, PROC_PID_FD_DIR+fd);  in proc_lookupfd()
862 	task_lock(task);  in proc_lookupfd()
863 	files = task->files;  in proc_lookupfd()
866 	task_unlock(task);  in proc_lookupfd()
914 	struct task_struct *task = dir->u.proc_i.task;  in proc_base_lookup()  local
930 	inode = proc_pid_make_inode(dir->i_sb, task, p->type);  in proc_base_lookup()
1040 	struct task_struct *task;  in proc_pid_lookup()  local
1055 		inode->u.proc_i.task = NULL;  in proc_pid_lookup()
1077 	task = find_task_by_pid(pid);  in proc_pid_lookup()
1078 	if (task)  in proc_pid_lookup()
1079 		get_task_struct(task);  in proc_pid_lookup()
1081 	if (!task)  in proc_pid_lookup()
1084 	inode = proc_pid_make_inode(dir->i_sb, task, PROC_PID_INO);  in proc_pid_lookup()
1086 	free_task_struct(task);  in proc_pid_lookup()
1107 	if (inode->u.proc_i.task)  in proc_pid_delete_inode()
1108 		free_task_struct(inode->u.proc_i.task);  in proc_pid_delete_inode()