diff options
| -rw-r--r-- | kernel/ptrace.c | 8 |
1 files changed, 3 insertions, 5 deletions
diff --git a/kernel/ptrace.c b/kernel/ptrace.c index 43485866749a..20d5efdeee02 100644 --- a/kernel/ptrace.c +++ b/kernel/ptrace.c @@ -112,16 +112,14 @@ int ptrace_check_attach(struct task_struct *child, int kill) */ read_lock(&tasklist_lock); if ((child->ptrace & PT_PTRACED) && child->parent == current) { - ret = 0; /* * child->sighand can't be NULL, release_task() * does ptrace_unlink() before __exit_signal(). */ spin_lock_irq(&child->sighand->siglock); - if (task_is_stopped(child)) - child->state = TASK_TRACED; - else if (!task_is_traced(child) && !kill) - ret = -ESRCH; + WARN_ON_ONCE(task_is_stopped(child)); + if (task_is_traced(child) || kill) + ret = 0; spin_unlock_irq(&child->sighand->siglock); } read_unlock(&tasklist_lock); |