From nobody Mon Apr 4 22:19:46 2022 X-Original-To: freebsd-stable@mlmmj.nyi.freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2610:1c1:1:606c::19:1]) by mlmmj.nyi.freebsd.org (Postfix) with ESMTP id 77B6F1A87ACE for ; Mon, 4 Apr 2022 22:19:56 +0000 (UTC) (envelope-from eugene@zhegan.in) Received: from elf.hq.norma.perm.ru (mail.norman-retail.ru [128.127.146.8]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (4096 bits) server-digest SHA256 client-signature RSA-PSS (2048 bits) client-digest SHA256) (Client CN "mail.norma.perm.ru", Issuer "Let's Encrypt Authority X3" (not verified)) by mx1.freebsd.org (Postfix) with ESMTPS id 4KXQF70Svtz4sSg for ; Mon, 4 Apr 2022 22:19:54 +0000 (UTC) (envelope-from eugene@zhegan.in) Received: from [192.168.243.7] ([192.168.243.7]) by elf.hq.norma.perm.ru (8.16.1/8.15.2) with ESMTP id 234ME9jL099709 for ; Tue, 5 Apr 2022 03:14:09 +0500 (+05) (envelope-from eugene@zhegan.in) DKIM-Signature: v=1; a=rsa-sha256; c=simple/simple; d=vivat-retail.ru; s=key; t=1649110449; bh=ODjLb2b2R2Ycay1xLfXZV2OWY0PnassZaQi8Ws2mWUc=; h=Date:To:From:Subject; b=OpyMgojDzmL18TTQ819IsakzWAqW/8wc2js1JuolTUjc0kXqFPZ4Y1RLJltLdPLVw Rzw7VtTfyVJuQOgsVqVPQTA9rJMX25dOG79njhnNMAYyaX2y5Syl1douCxm5MyBL8P aph4k31Lu6ehwUzKCDH7dNlt/a9TtVlTkCIxh+4Y= Message-ID: Date: Tue, 5 Apr 2022 03:19:46 +0500 List-Id: Production branch of FreeBSD source code List-Archive: https://lists.freebsd.org/archives/freebsd-stable List-Help: List-Post: List-Subscribe: List-Unsubscribe: Sender: owner-freebsd-stable@freebsd.org X-BeenThere: freebsd-stable@freebsd.org MIME-Version: 1.0 User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:91.0) Gecko/20100101 Thunderbird/91.7.0 To: freebsd-stable@freebsd.org Content-Language: ru From: "Eugene M. Zheganin" Subject: FreeBSD on KVM, Q35 and kernel structure leak Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 8bit X-Rspamd-Queue-Id: 4KXQF70Svtz4sSg X-Spamd-Bar: -- Authentication-Results: mx1.freebsd.org; dkim=fail ("headers rsa verify failed") header.d=vivat-retail.ru header.s=key header.b=OpyMgojD; dmarc=none; spf=pass (mx1.freebsd.org: domain of eugene@zhegan.in designates 128.127.146.8 as permitted sender) smtp.mailfrom=eugene@zhegan.in X-Spamd-Result: default: False [-2.30 / 15.00]; R_SPF_ALLOW(-0.20)[+a]; R_DKIM_REJECT(1.00)[vivat-retail.ru:s=key]; TO_DN_NONE(0.00)[]; DKIM_TRACE(0.00)[vivat-retail.ru:-]; NEURAL_HAM_SHORT(-1.00)[-1.000]; FROM_EQ_ENVFROM(0.00)[]; MIME_TRACE(0.00)[0:+]; RCVD_TLS_LAST(0.00)[]; ASN(0.00)[asn:212494, ipnet:128.127.146.0/24, country:RU]; MID_RHS_MATCH_FROM(0.00)[]; ARC_NA(0.00)[]; NEURAL_HAM_MEDIUM(-1.00)[-1.000]; FROM_HAS_DN(0.00)[]; TO_MATCH_ENVRCPT_ALL(0.00)[]; NEURAL_HAM_LONG(-1.00)[-1.000]; MIME_GOOD(-0.10)[text/plain]; PREVIOUSLY_DELIVERED(0.00)[freebsd-stable@freebsd.org]; DMARC_NA(0.00)[zhegan.in]; RCPT_COUNT_ONE(0.00)[1]; MLMMJ_DEST(0.00)[freebsd-stable]; RCVD_COUNT_TWO(0.00)[2] X-ThisMailContainsUnwantedMimeParts: N Hello, I'm trying to run FreeBSD 13.1-RC1 (releng/13.1-n250066-aef190f298a) on KVM/Qemu, presumably Q35 type VM in Hetzner. After some uptime and considerable amount of connections, VM leaks tcp_inpcb to the limit: ITEM                   SIZE  LIMIT     USED     FREE      REQ FAILSLEEP XDOMAIN tcp_inpcb:              496, 510671,  510281,     391, 617269,11530,   0,   0 Causing multiple dmesg errors sonewconn: pcb 0xfffff8001ac8bd90: pru_attach() failed sonewconn: pcb 0xfffff8000ab625d0: pru_attach() failed sonewconn: pcb 0xfffff8000af999b0: pru_attach() failed sonewconn: pcb 0xfffff8000ab621f0: pru_attach() failed sonewconn: pcb 0xfffff8000ab62000: pru_attach() failed sonewconn: pcb 0xfffff8000ab625d0: pru_attach() failed sonewconn: pcb 0xfffff8000af999b0: pru_attach() failed sonewconn: pcb 0xfffff8000af999b0: pru_attach() failed sonewconn: pcb 0xfffff8000af993e0: pru_attach() failed sonewconn: pcb 0xfffff8000af999b0: pru_attach() failed sonewconn: pcb 0xfffff8000ab627c0: pru_attach() failed console errors (even on low number of kern.ipc.numopensockets: 1447) [zone: tcp_inpcb] kern.ipc.maxsockets limit reached [zone: tcp_inpcb] kern.ipc.maxsockets limit reached [zone: tcp_inpcb] kern.ipc.maxsockets limit reached [zone: tcp_inpcb] kern.ipc.maxsockets limit reached [zone: tcp_inpcb] kern.ipc.maxsockets limit reached [zone: tcp_inpcb] kern.ipc.maxsockets limit reached [zone: tcp_inpcb] kern.ipc.maxsockets limit reached [zone: tcp_inpcb] kern.ipc.maxsockets limit reached [zone: tcp_inpcb] kern.ipc.maxsockets limit reached [zone: tcp_inpcb] kern.ipc.maxsockets limit reached and inability to connect to just anything: # telnet 127.0.0.1 4080 Trying 127.0.0.1... telnet: socket: No buffer space available Even when the number of connections id dropped (for instance I remove this VM from balancing) it cannot recover (not freeing tcp_inpcb). is there any hope considering this ? Thanks. Eugene.