Author: kib
Date: Wed Sep 16 21:40:32 2020
New Revision: 365813
URL: https://svnweb.freebsd.org/changeset/base/365813

Log:
  Assert that P_TREE_GRPEXITED is set only once.
  
  Tested by:    pho
  Sponsored by: The FreeBSD Foundation
  MFC after:    1 week
  Differential revision:        https://reviews.freebsd.org/D26416

Modified:
  head/sys/kern/kern_proc.c

Modified: head/sys/kern/kern_proc.c
==============================================================================
--- head/sys/kern/kern_proc.c   Wed Sep 16 21:38:24 2020        (r365812)
+++ head/sys/kern/kern_proc.c   Wed Sep 16 21:40:32 2020        (r365813)
@@ -851,6 +851,7 @@ fixjobc_kill(struct proc *p)
         * It is marked by the flag because p is only physically
         * removed from its process group on wait(2).
         */
+       MPASS((p->p_treeflag & P_TREE_GRPEXITED) == 0);
        p->p_treeflag |= P_TREE_GRPEXITED;
 
        /*
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