Re: [PATCH net-next 1/2] connector/cn_proc: Handle threads for proc connector

On 09/19, Anjali Kulkarni wrote:

@@ -413,6 +416,10 @@ static void cn_proc_mcast_ctl(struct cn_msg *msg, if (msg->len == sizeof(*pinput)) { pinput = (struct proc_input *)msg->data; mc_op = pinput->mcast_op;

• if (mc_op == PROC_CN_MCAST_NOTIFY) {
  

• 	current->exit_code = pinput->uexit_code;
  

• 	return;
  

...

--- a/kernel/exit.c +++ b/kernel/exit.c @@ -821,6 +821,7 @@ void __noreturn do_exit(long code) { struct task_struct *tsk = current; int group_dead;

• __u32 uexit_code;

WARN_ON(irqs_disabled()); @@ -863,6 +864,8 @@ void __noreturn do_exit(long code) tty_audit_exit(); audit_free(tsk);

• uexit_code = tsk->exit_code;

I don't think you can use task_struct->exit_code. If this task is ptraced, it can be changed/cleared in, say, ptrace_stop() after PROC_CN_MCAST_NOTIFY.

Oleg.