---

yaml --- r: 84648 b: refs/heads/master c: c0c0b64 h: refs/heads/master v: v3
git-mirror · Feb 8, 2008 · ce0a712 · ce0a712
1 parent 9bf711b
commit ce0a712
Show file tree

Hide file tree

Showing 2 changed files with 6 additions and 3 deletions.
diff --git a/[refs] b/[refs]
@@ -1,2 +1,2 @@
 ---
-refs/heads/master: 34a1738f7da0b3d28d4b066d03a78f46b8cab68f
+refs/heads/master: c0c0b649d67aa775aa9851de61aade17504be70c
diff --git a/trunk/kernel/ptrace.c b/trunk/kernel/ptrace.c
@@ -99,9 +99,12 @@ int ptrace_check_attach(struct task_struct *child, int kill)
 	 * be changed by us so it's not changing right after this.
 	 */
 	read_lock(&tasklist_lock);
-	if ((child->ptrace & PT_PTRACED) && child->parent == current &&
-	     child->signal != NULL) {
+	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;