Kill kernel/ptrace-common.h, this code lives in kernel/ptrace.c
above "#ifndef CONFIG_UTRACE".
---
kernel/ptrace-utrace.c | 3
kernel/ptrace-common.h | 278 -------------------------------------------------
2 files changed, 2 insertions(+), 279 deletions(-)
--- UTRACE-PTRACE/kernel/ptrace-utrace.c~138_KILL_PTRACE_COMMON 2009-11-21
21:47:11.000000000 +0100
+++ UTRACE-PTRACE/kernel/ptrace-utrace.c 2009-11-21 22:15:51.000000000
+0100
@@ -23,7 +23,6 @@
#include <linux/pid_namespace.h>
#include <linux/syscalls.h>
#include <linux/uaccess.h>
-#include "ptrace-common.h"
/*
* ptrace a task: make the debugger its new parent and
@@ -1055,6 +1054,8 @@ int ptrace_request(struct task_struct *c
}
#if defined CONFIG_COMPAT
+#include <linux/compat.h>
+
int compat_ptrace_request(struct task_struct *child, compat_long_t request,
compat_ulong_t addr, compat_ulong_t data)
{
--- UTRACE-PTRACE/kernel/ptrace-common.h
+++ /dev/null
@@ -1,278 +0,0 @@
-int __ptrace_may_access(struct task_struct *task, unsigned int mode)
-{
- const struct cred *cred = current_cred(), *tcred;
-
- /* May we inspect the given task?
- * This check is used both for attaching with ptrace
- * and for allowing access to sensitive information in /proc.
- *
- * ptrace_attach denies several cases that /proc allows
- * because setting up the necessary parent/child relationship
- * or halting the specified task is impossible.
- */
- int dumpable = 0;
- /* Don't let security modules deny introspection */
- if (task == current)
- return 0;
- rcu_read_lock();
- tcred = __task_cred(task);
- if ((cred->uid != tcred->euid ||
- cred->uid != tcred->suid ||
- cred->uid != tcred->uid ||
- cred->gid != tcred->egid ||
- cred->gid != tcred->sgid ||
- cred->gid != tcred->gid) &&
- !capable(CAP_SYS_PTRACE)) {
- rcu_read_unlock();
- return -EPERM;
- }
- rcu_read_unlock();
- smp_rmb();
- if (task->mm)
- dumpable = get_dumpable(task->mm);
- if (!dumpable && !capable(CAP_SYS_PTRACE))
- return -EPERM;
-
- return security_ptrace_access_check(task, mode);
-}
-
-bool ptrace_may_access(struct task_struct *task, unsigned int mode)
-{
- int err;
- task_lock(task);
- err = __ptrace_may_access(task, mode);
- task_unlock(task);
- return !err;
-}
-
-/*
- * Called with irqs disabled, returns true if childs should reap themselves.
- */
-static int ignoring_children(struct sighand_struct *sigh)
-{
- int ret;
- spin_lock(&sigh->siglock);
- ret = (sigh->action[SIGCHLD-1].sa.sa_handler == SIG_IGN) ||
- (sigh->action[SIGCHLD-1].sa.sa_flags & SA_NOCLDWAIT);
- spin_unlock(&sigh->siglock);
- return ret;
-}
-
-/*
- * Called with tasklist_lock held for writing.
- * Unlink a traced task, and clean it up if it was a traced zombie.
- * Return true if it needs to be reaped with release_task().
- * (We can't call release_task() here because we already hold tasklist_lock.)
- *
- * If it's a zombie, our attachedness prevented normal parent notification
- * or self-reaping. Do notification now if it would have happened earlier.
- * If it should reap itself, return true.
- *
- * If it's our own child, there is no notification to do. But if our normal
- * children self-reap, then this child was prevented by ptrace and we must
- * reap it now, in that case we must also wake up sub-threads sleeping in
- * do_wait().
- */
-static bool __ptrace_detach(struct task_struct *tracer, struct task_struct *p)
-{
- __ptrace_unlink(p);
-
- if (p->exit_state == EXIT_ZOMBIE) {
- if (!task_detached(p) && thread_group_empty(p)) {
- if (!same_thread_group(p->real_parent, tracer))
- do_notify_parent(p, p->exit_signal);
- else if (ignoring_children(tracer->sighand)) {
- __wake_up_parent(p, tracer);
- p->exit_signal = -1;
- }
- }
- if (task_detached(p)) {
- /* Mark it as in the process of being reaped. */
- p->exit_state = EXIT_DEAD;
- return true;
- }
- }
-
- return false;
-}
-
-int ptrace_readdata(struct task_struct *tsk, unsigned long src, char __user
*dst, int len)
-{
- int copied = 0;
-
- while (len > 0) {
- char buf[128];
- int this_len, retval;
-
- this_len = (len > sizeof(buf)) ? sizeof(buf) : len;
- retval = access_process_vm(tsk, src, buf, this_len, 0);
- if (!retval) {
- if (copied)
- break;
- return -EIO;
- }
- if (copy_to_user(dst, buf, retval))
- return -EFAULT;
- copied += retval;
- src += retval;
- dst += retval;
- len -= retval;
- }
- return copied;
-}
-
-int ptrace_writedata(struct task_struct *tsk, char __user *src, unsigned long
dst, int len)
-{
- int copied = 0;
-
- while (len > 0) {
- char buf[128];
- int this_len, retval;
-
- this_len = (len > sizeof(buf)) ? sizeof(buf) : len;
- if (copy_from_user(buf, src, this_len))
- return -EFAULT;
- retval = access_process_vm(tsk, dst, buf, this_len, 1);
- if (!retval) {
- if (copied)
- break;
- return -EIO;
- }
- copied += retval;
- src += retval;
- dst += retval;
- len -= retval;
- }
- return copied;
-}
-
-static struct task_struct *ptrace_get_task_struct(pid_t pid)
-{
- struct task_struct *child;
-
- rcu_read_lock();
- child = find_task_by_vpid(pid);
- if (child)
- get_task_struct(child);
- rcu_read_unlock();
-
- if (!child)
- return ERR_PTR(-ESRCH);
- return child;
-}
-
-#ifndef arch_ptrace_attach
-#define arch_ptrace_attach(child) do { } while (0)
-#endif
-
-SYSCALL_DEFINE4(ptrace, long, request, long, pid, long, addr, long, data)
-{
- struct task_struct *child;
- long ret;
-
- /*
- * This lock_kernel fixes a subtle race with suid exec
- */
- lock_kernel();
- if (request == PTRACE_TRACEME) {
- ret = ptrace_traceme();
- if (!ret)
- arch_ptrace_attach(current);
- goto out;
- }
-
- child = ptrace_get_task_struct(pid);
- if (IS_ERR(child)) {
- ret = PTR_ERR(child);
- goto out;
- }
-
- if (request == PTRACE_ATTACH) {
- ret = ptrace_attach(child);
- /*
- * Some architectures need to do book-keeping after
- * a ptrace attach.
- */
- if (!ret)
- arch_ptrace_attach(child);
- goto out_put_task_struct;
- }
-
- ret = ptrace_check_attach(child, request == PTRACE_KILL);
- if (ret < 0)
- goto out_put_task_struct;
-
- ret = arch_ptrace(child, request, addr, data);
-
- out_put_task_struct:
- put_task_struct(child);
- out:
- unlock_kernel();
- return ret;
-}
-
-int generic_ptrace_peekdata(struct task_struct *tsk, long addr, long data)
-{
- unsigned long tmp;
- int copied;
-
- copied = access_process_vm(tsk, addr, &tmp, sizeof(tmp), 0);
- if (copied != sizeof(tmp))
- return -EIO;
- return put_user(tmp, (unsigned long __user *)data);
-}
-
-int generic_ptrace_pokedata(struct task_struct *tsk, long addr, long data)
-{
- int copied;
-
- copied = access_process_vm(tsk, addr, &data, sizeof(data), 1);
- return (copied == sizeof(data)) ? 0 : -EIO;
-}
-
-#if defined CONFIG_COMPAT
-#include <linux/compat.h>
-
-asmlinkage long compat_sys_ptrace(compat_long_t request, compat_long_t pid,
- compat_long_t addr, compat_long_t data)
-{
- struct task_struct *child;
- long ret;
-
- /*
- * This lock_kernel fixes a subtle race with suid exec
- */
- lock_kernel();
- if (request == PTRACE_TRACEME) {
- ret = ptrace_traceme();
- goto out;
- }
-
- child = ptrace_get_task_struct(pid);
- if (IS_ERR(child)) {
- ret = PTR_ERR(child);
- goto out;
- }
-
- if (request == PTRACE_ATTACH) {
- ret = ptrace_attach(child);
- /*
- * Some architectures need to do book-keeping after
- * a ptrace attach.
- */
- if (!ret)
- arch_ptrace_attach(child);
- goto out_put_task_struct;
- }
-
- ret = ptrace_check_attach(child, request == PTRACE_KILL);
- if (!ret)
- ret = compat_arch_ptrace(child, request, addr, data);
-
- out_put_task_struct:
- put_task_struct(child);
- out:
- unlock_kernel();
- return ret;
-}
-#endif /* CONFIG_COMPAT */
