ptrace: do not use task->ptrace directly in core kernel
No functional changes.
- Nobody except ptrace.c & co should use ptrace flags directly, we have
task_ptrace() for that.
- No need to specially check PT_PTRACED, we must not have other PT_ bits
set without PT_PTRACED. And no need to know this flag exists.
Signed-off-by: Oleg Nesterov <oleg@redhat.com>
Cc: Roland McGrath <roland@redhat.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
diff --git a/kernel/exit.c b/kernel/exit.c
index 213f906..938ccee 100644
--- a/kernel/exit.c
+++ b/kernel/exit.c
@@ -757,7 +757,7 @@
p->exit_signal = SIGCHLD;
/* If it has exited notify the new parent about this child's death. */
- if (!p->ptrace &&
+ if (!task_ptrace(p) &&
p->exit_state == EXIT_ZOMBIE && thread_group_empty(p)) {
do_notify_parent(p, p->exit_signal);
if (task_detached(p)) {
@@ -782,7 +782,7 @@
list_for_each_entry_safe(p, n, &father->children, sibling) {
p->real_parent = reaper;
if (p->parent == father) {
- BUG_ON(p->ptrace);
+ BUG_ON(task_ptrace(p));
p->parent = p->real_parent;
}
reparent_thread(father, p, &dead_children);
@@ -1482,7 +1482,7 @@
return 0;
}
- if (likely(!ptrace) && unlikely(p->ptrace)) {
+ if (likely(!ptrace) && unlikely(task_ptrace(p))) {
/*
* This child is hidden by ptrace.
* We aren't allowed to see it now, but eventually we will.
diff --git a/kernel/signal.c b/kernel/signal.c
index d81f495..09ccc1c 100644
--- a/kernel/signal.c
+++ b/kernel/signal.c
@@ -1410,7 +1410,7 @@
/* do_notify_parent_cldstop should have been called instead. */
BUG_ON(task_is_stopped_or_traced(tsk));
- BUG_ON(!tsk->ptrace &&
+ BUG_ON(!task_ptrace(tsk) &&
(tsk->group_leader != tsk || !thread_group_empty(tsk)));
info.si_signo = sig;
@@ -1449,7 +1449,7 @@
psig = tsk->parent->sighand;
spin_lock_irqsave(&psig->siglock, flags);
- if (!tsk->ptrace && sig == SIGCHLD &&
+ if (!task_ptrace(tsk) && sig == SIGCHLD &&
(psig->action[SIGCHLD-1].sa.sa_handler == SIG_IGN ||
(psig->action[SIGCHLD-1].sa.sa_flags & SA_NOCLDWAIT))) {
/*
@@ -1486,7 +1486,7 @@
struct task_struct *parent;
struct sighand_struct *sighand;
- if (tsk->ptrace & PT_PTRACED)
+ if (task_ptrace(tsk))
parent = tsk->parent;
else {
tsk = tsk->group_leader;
@@ -1535,7 +1535,7 @@
static inline int may_ptrace_stop(void)
{
- if (!likely(current->ptrace & PT_PTRACED))
+ if (!likely(task_ptrace(current)))
return 0;
/*
* Are we in the middle of do_coredump?
@@ -1753,7 +1753,7 @@
static int ptrace_signal(int signr, siginfo_t *info,
struct pt_regs *regs, void *cookie)
{
- if (!(current->ptrace & PT_PTRACED))
+ if (!task_ptrace(current))
return signr;
ptrace_signal_deliver(regs, cookie);