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-rw-r--r--kernel/ptrace.c3
1 files changed, 2 insertions, 1 deletions
diff --git a/kernel/ptrace.c b/kernel/ptrace.c
index 6252d2fa2bf..335c5b932e1 100644
--- a/kernel/ptrace.c
+++ b/kernel/ptrace.c
@@ -214,7 +214,7 @@ out:
return retval;
}
-void __ptrace_detach(struct task_struct *child, unsigned int data)
+static inline void __ptrace_detach(struct task_struct *child, unsigned int data)
{
child->exit_code = data;
/* .. re-parent .. */
@@ -233,6 +233,7 @@ int ptrace_detach(struct task_struct *child, unsigned int data)
ptrace_disable(child);
write_lock_irq(&tasklist_lock);
+ /* protect against de_thread()->release_task() */
if (child->ptrace)
__ptrace_detach(child, data);
write_unlock_irq(&tasklist_lock);