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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
This commit is contained in:
djm@openbsd.org 2019-11-01 03:54:33 +00:00 committed by Damien Miller
parent 03f9205f0f
commit 4332b4fe49
1 changed files with 7 additions and 4 deletions
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11
sftp.c
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@ -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);