From: djm@openbsd.org <djm@openbsd.org>
Date: Thu, 17 Feb 2022 10:58:27 +0000 (+0000)
Subject: upstream: check for EINTR/EAGAIN failures in the rfd fast-path; caught
X-Git-Tag: V_8_9_P1~15
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=667fec5d4fe4406745750a32f69b5d2e1a75e94b;p=thirdparty%2Fopenssh-portable.git

upstream: check for EINTR/EAGAIN failures in the rfd fast-path; caught

by dtucker's minix3 vm :) ok dtucker@

OpenBSD-Commit-ID: 2e2c895a3e82ef347aa6694394a76a438be91361
---

diff --git a/channels.c b/channels.c
index d662ff03a..73e93c032 100644
--- a/channels.c
+++ b/channels.c
@@ -1,4 +1,4 @@
-/* $OpenBSD: channels.c,v 1.412 2022/01/22 00:45:31 djm Exp $ */
+/* $OpenBSD: channels.c,v 1.413 2022/02/17 10:58:27 djm Exp $ */
 /*
  * Author: Tatu Ylonen <ylo@cs.hut.fi>
  * Copyright (c) 1995 Tatu Ylonen <ylo@cs.hut.fi>, Espoo, Finland
@@ -1951,6 +1951,9 @@ channel_handle_rfd(struct ssh *ssh, Channel *c)
 		if (maxlen > avail)
 			maxlen = avail;
 		if ((r = sshbuf_read(c->rfd, c->input, maxlen, NULL)) != 0) {
+			if (errno == EINTR || (!force &&
+			    (errno == EAGAIN || errno == EWOULDBLOCK)))
+				return 1;
 			debug2("channel %d: read failed rfd %d maxlen %zu: %s",
 			    c->self, c->rfd, maxlen, ssh_err(r));
 			goto rfail;