During coredumps only a single thread should be active, check this

by checking that it is a single threaded process or that ps_single is set.
OK mpi@

diff --git a/sys/kern/exec_elf.c b/sys/kern/exec_elf.c
index 567a252..da29b0f 100644 (file)
--- a/sys/kern/exec_elf.c
+++ b/sys/kern/exec_elf.c
@@ -1,4 +1,4 @@
-/*     $OpenBSD: exec_elf.c,v 1.165 2021/12/09 00:26:10 guenther Exp $ */
+/*     $OpenBSD: exec_elf.c,v 1.166 2022/05/12 16:29:58 claudio Exp $  */
 
 /*
  * Copyright (c) 1996 Per Fogelstrom
@@ -1165,6 +1165,7 @@ coredump_notes_elf(struct proc *p, void *iocookie, size_t *sizep)
        size_t size, notesize;
        int error;
 
+       KASSERT(!P_HASSIBLING(p) || pr->ps_single != NULL);
        size = 0;
 
        /* First, write an elfcore_procinfo. */