From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from conssluserg-05.nifty.com (conssluserg-05.nifty.com [210.131.2.90]) by sourceware.org (Postfix) with ESMTPS id 161583992CA4 for ; Thu, 5 Aug 2021 16:43:46 +0000 (GMT) DMARC-Filter: OpenDMARC Filter v1.4.1 sourceware.org 161583992CA4 Received: from Express5800-S70 (z221123.dynamic.ppp.asahi-net.or.jp [110.4.221.123]) (authenticated) by conssluserg-05.nifty.com with ESMTP id 175GhQCo002371 for ; Fri, 6 Aug 2021 01:43:26 +0900 DKIM-Filter: OpenDKIM Filter v2.10.3 conssluserg-05.nifty.com 175GhQCo002371 X-Nifty-SrcIP: [110.4.221.123] Date: Fri, 6 Aug 2021 01:43:31 +0900 From: Takashi Yano To: cygwin@cygwin.com Subject: Re: SSHD causes 100% CPU load Message-Id: <20210806014331.899fb21f181e664663c328ae@nifty.ne.jp> In-Reply-To: References: <145999495.20210426124252@cfos.de> <1342428656.20210428072302@yandex.ru> <20210805191242.b29a3904cbc4d082bdc3dd37@nifty.ne.jp> X-Mailer: Sylpheed 3.7.0 (GTK+ 2.24.30; i686-pc-mingw32) Mime-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit X-Spam-Status: No, score=-3.6 required=5.0 tests=BAYES_00, DKIM_SIGNED, DKIM_VALID, DKIM_VALID_AU, DKIM_VALID_EF, NICE_REPLY_A, RCVD_IN_DNSWL_NONE, RCVD_IN_MSPIKE_H2, SPF_HELO_NONE, SPF_PASS, TXREP autolearn=ham autolearn_force=no version=3.4.4 X-Spam-Checker-Version: SpamAssassin 3.4.4 (2020-01-24) on server2.sourceware.org X-BeenThere: cygwin@cygwin.com X-Mailman-Version: 2.1.29 Precedence: list List-Id: General Cygwin discussions and problem reports List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Thu, 05 Aug 2021 16:43:51 -0000 Hi Corinna, On Thu, 5 Aug 2021 17:07:24 +0200 Corinna Vinschen wrote: > Could you perhaps bisect the issue on your machine? In my environment, this does not happen with 8.4p1-1 and 8.4p1-2. However it happens with 8.5p1-1. > The fact that using Windows ssh is an issue makes me wonder if this is > some kind of pty problem. With command 'ssh user@localhost ls', pty does not allocated. It seems that this issue does not happen if -t option (allocate tty) is specified. So I think this is not a pty problem. In order to look into this problem, I tried to build openssh-8.5p1-1 from source, however it cause the error in configure stage: ... checking for pkg-config... (cached) /usr/bin/pkg-config checking if /usr/bin/pkg-config knows about libfido2... no checking for fido_init in -lfido2... no configure: error: no usable libfido2 found *** ERROR: configure failed despite libfido2-devel had been installed. $ cygcheck -c libfido2-devel Cygwin Package Information Package Version Status libfido2-devel 1.5.0-1 OK How can I solve this error? -- Takashi Yano