Messages in this thread Patch in this message | | | From | (Eric W. Biederman) | Date | Sun, 16 Sep 2018 20:05:18 +0200 | Subject | [PATCH 2/4] signal: Use group_send_sig_info to kill all processes in a pid namespace |
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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: "Eric W. Biederman" <ebiederm@xmission.com> --- kernel/pid_namespace.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/kernel/pid_namespace.c b/kernel/pid_namespace.c index c8d53397bbdd..aa6e72fb7c08 100644 --- a/kernel/pid_namespace.c +++ b/kernel/pid_namespace.c @@ -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(); -- 2.17.1
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