From 4332b4fe49360679647a8705bc08f4e81323f6b4 Mon Sep 17 00:00:00 2001
From: "djm@openbsd.org" <djm@openbsd.org>
Date: Fri, 1 Nov 2019 03:54:33 +0000
Subject: upstream: fix a race condition in the SIGCHILD handler that could
 turn

in to a kill(-1); bz3084, reported by Gao Rui, ok dtucker@

OpenBSD-Commit-ID: ac2742e04a69d4c34223505b6a32f6d686e18896
---
 sftp.c | 11 +++++++----
 1 file changed, 7 insertions(+), 4 deletions(-)

(limited to 'sftp.c')

diff --git a/sftp.c b/sftp.c
index b66037f16..54538ff96 100644
--- a/sftp.c
+++ b/sftp.c
@@ -1,4 +1,4 @@
-/* $OpenBSD: sftp.c,v 1.195 2019/10/02 00:42:30 djm Exp $ */
+/* $OpenBSD: sftp.c,v 1.196 2019/11/01 03:54:33 djm Exp $ */
 /*
  * Copyright (c) 2001-2004 Damien Miller <djm@openbsd.org>
  *
@@ -220,9 +220,12 @@ static const struct CMD cmds[] = {
 static void
 killchild(int signo)
 {
-	if (sshpid > 1) {
-		kill(sshpid, SIGTERM);
-		waitpid(sshpid, NULL, 0);
+	pid_t pid;
+
+	pid = sshpid;
+	if (pid > 1) {
+		kill(pid, SIGTERM);
+		waitpid(pid, NULL, 0);
 	}
 
 	_exit(1);
-- 
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