Commit 82058d66 authored by Eric W. Biederman's avatar Eric W. Biederman
Browse files

signal: Use group_send_sig_info to kill all processes in a pid namespace 



Replace send_sig_info in zap_pid_ns_processes with
group_send_sig_info.  This makes more sense as the entire process
group is being killed.  More importantly this allows the kill of those
processes with PIDTYPE_MAX to indicate all of the process in the pid
namespace are being signaled.  This is needed for fork to detect when
signals are sent to a group of processes.

Admittedly fork has another case to catch SIGKILL but the principle remains
that it is desirable to know when a group of processes is being signaled.

Signed-off-by: default avatar"Eric W. Biederman" <ebiederm@xmission.com>
parent a8ebd171

kernel/pid_namespace.c

+1 −1
Original line number Diff line number Diff line
@@ -216,7 +216,7 @@ void zap_pid_ns_processes(struct pid_namespace *pid_ns) 
	idr_for_each_entry_continue(&pid_ns->idr, pid, nr) {

		task = pid_task(pid, PIDTYPE_PID);

		if (task && !__fatal_signal_pending(task))

			send_sig_info(SIGKILL, SEND_SIG_PRIV, task);

			group_send_sig_info(SIGKILL, SEND_SIG_PRIV, task, PIDTYPE_MAX);

	}

	read_unlock(&tasklist_lock);

	rcu_read_unlock();