svn commit: r310581 - stable/11/sys/kern

[Konstantin Belousov]

Author: kib
Date: Mon Dec 26 10:01:52 2016
New Revision: 310581
URL: https://svnweb.freebsd.org/changeset/base/310581

Log:
  MFC r309886:
  When a zombie gets reparented due to the parent exit, send SIGCHLD to
  the reaper.

Modified:
  stable/11/sys/kern/kern_exit.c
Directory Properties:
  stable/11/   (props changed)

Modified: stable/11/sys/kern/kern_exit.c
==============================================================================
--- stable/11/sys/kern/kern_exit.c	Mon Dec 26 09:56:52 2016	(r310580)
+++ stable/11/sys/kern/kern_exit.c	Mon Dec 26 10:01:52 2016	(r310581)
@@ -455,6 +455,11 @@ exit1(struct thread *td, int rval, int s
 
 		if (!(q->p_flag & P_TRACED)) {
 			proc_reparent(q, q->p_reaper);
+			if (q->p_state == PRS_ZOMBIE) {
+				PROC_LOCK(q->p_reaper);
+				pksignal(q->p_reaper, SIGCHLD, q->p_ksi);
+				PROC_UNLOCK(q->p_reaper);
+			}
 		} else {
 			/*
 			 * Traced processes are killed since their existence