static void ptrace_bts_detach(struct task_struct *child)
{
- if (unlikely(child->bts)) {
- ds_release_bts(child->bts);
- child->bts = NULL;
-
- ptrace_bts_free_buffer(child);
- }
+ /*
+ * Ptrace_detach() races with ptrace_untrace() in case
+ * the child dies and is reaped by another thread.
+ *
+ * We only do the memory accounting at this point and
+ * leave the buffer deallocation and the bts tracer
+ * release to ptrace_bts_untrace() which will be called
+ * later on with tasklist_lock held.
+ */
+ release_locked_buffer(child->bts_buffer, child->bts_size);
}
#else
static inline void ptrace_bts_fork(struct task_struct *tsk) {}