From nobody Wed Jun 15 04:55:42 2022 X-Original-To: net@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 472C2836CEC for ; Wed, 15 Jun 2022 04:55:42 +0000 (UTC) (envelope-from bugzilla-noreply@freebsd.org) Received: from mxrelay.nyi.freebsd.org (mxrelay.nyi.freebsd.org [IPv6:2610:1c1:1:606c::19:3]) (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 (4096 bits) client-digest SHA256) (Client CN "mxrelay.nyi.freebsd.org", Issuer "R3" (verified OK)) by mx1.freebsd.org (Postfix) with ESMTPS id 4LNCg20qytz4XQM for ; Wed, 15 Jun 2022 04:55:42 +0000 (UTC) (envelope-from bugzilla-noreply@freebsd.org) Received: from kenobi.freebsd.org (kenobi.freebsd.org [IPv6:2610:1c1:1:606c::50:1d]) (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 did not present a certificate) by mxrelay.nyi.freebsd.org (Postfix) with ESMTPS id ED2AD17F5C for ; Wed, 15 Jun 2022 04:55:41 +0000 (UTC) (envelope-from bugzilla-noreply@freebsd.org) Received: from kenobi.freebsd.org ([127.0.1.5]) by kenobi.freebsd.org (8.15.2/8.15.2) with ESMTP id 25F4tfsQ097736 for ; Wed, 15 Jun 2022 04:55:41 GMT (envelope-from bugzilla-noreply@freebsd.org) Received: (from www@localhost) by kenobi.freebsd.org (8.15.2/8.15.2/Submit) id 25F4tfer097735 for net@FreeBSD.org; Wed, 15 Jun 2022 04:55:41 GMT (envelope-from bugzilla-noreply@freebsd.org) X-Authentication-Warning: kenobi.freebsd.org: www set sender to bugzilla-noreply@freebsd.org using -f From: bugzilla-noreply@freebsd.org To: net@FreeBSD.org Subject: [Bug 264257] [tcp] Panic: Fatal trap 12: page fault while in kernel mode (if_io_tqg_4) - m_copydata ... at /usr/src/sys/kern/uipc_mbuf.c:659 Date: Wed, 15 Jun 2022 04:55:42 +0000 X-Bugzilla-Reason: CC AssignedTo X-Bugzilla-Type: changed X-Bugzilla-Watch-Reason: None X-Bugzilla-Product: Base System X-Bugzilla-Component: kern X-Bugzilla-Version: 13.1-RELEASE X-Bugzilla-Keywords: crash, needs-qa X-Bugzilla-Severity: Affects Only Me X-Bugzilla-Who: rscheff@freebsd.org X-Bugzilla-Status: Open X-Bugzilla-Resolution: X-Bugzilla-Priority: --- X-Bugzilla-Assigned-To: net@FreeBSD.org X-Bugzilla-Flags: maintainer-feedback? maintainer-feedback? maintainer-feedback- maintainer-feedback? mfc-stable13? X-Bugzilla-Changed-Fields: Message-ID: In-Reply-To: References: Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable X-Bugzilla-URL: https://bugs.freebsd.org/bugzilla/ Auto-Submitted: auto-generated List-Id: Networking and TCP/IP with FreeBSD List-Archive: https://lists.freebsd.org/archives/freebsd-net List-Help: List-Post: List-Subscribe: List-Unsubscribe: Sender: owner-freebsd-net@freebsd.org MIME-Version: 1.0 ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=freebsd.org; s=dkim; t=1655268942; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=dHC9fmhV4S8xiBkcn18cTY8tM8IzGnoUWsoJ6Xo/orY=; b=Q2zuGzu/oc9dwxvIenaNtFN4O3WD1cDgVyr+uAxT6vcnEyaIn9m3sR0UzOFB/bM6yBIkfT NbSvflFp/lBM+3AVvhpLvJ2mSxkSUxBItiarMhqSKzSDcTXXtKVgIs0/tde6Cky81+XOnF sYlSxTQK47JwX34lAci+sLO6qjyg2xE85zoXEUAmQG4/Kmi/pM25ZUUI8/Gtbadnzvj6Qt z32HkaSEy2At5d2hYZZqgxjYVY0bjC501coAm3UdCiOAfIJ9soch2dxeMMfhRSDOTAHR3r OAC10tEDlZv3BaGsQLKoerz0EwpU5z3U1XLjElCn8FFcKCx7bxATQA0kvq4BXw== ARC-Seal: i=1; s=dkim; d=freebsd.org; t=1655268942; a=rsa-sha256; cv=none; b=VT79aKt9EwYQg298MnXVvgy1EWjxkNm9jU1llY71q/KgGyYQ4I2qSlZ6kAZ72csscMpQLl BhcJK8Pmz0hQOX8mRueeBa4NpCzuRb3qe3D+cbXKHc8RdIMpy2deBa3HFHTfmmq1jdSKjy oaf0l2BrDyJ8OngSiKGD/03SgbvRVVU/ARNsLfBCoCWj/gjCZEcgPLDTjNxNhkT/G7ZWtK dZBlLNo17uiiaRG8VISD49fDnhfKEm5awcrls4Kv1i284vRBKMZEZUGGHuB4ibACBImckG KriMVrWrGJjqqd3FiMopbNiJQGaqY+vinX2Hz4x3C2RbKSsvfCY1iBoVRU2CEg== ARC-Authentication-Results: i=1; mx1.freebsd.org; none X-ThisMailContainsUnwantedMimeParts: N https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=3D264257 --- Comment #55 from Richard Scheffenegger --- Thanks for the core. For stable operation, please use an unpatched kernel, = and without net.inet.tcp.rfc6675_pipe=3D0 The patched cores confirm that during the very final phases, the stack increments one of the variables multiple times for the FIN bit, when it sho= uld only have incremented it once. Together with SACK rescue retransmissions (enabled by above sysctl) this leads to an attempt to send out non-existing data. the TCPPCAP and sudo syssctl net.inet.tcp.tcp_pcap_packets=3D10 would retai= n the last 10 packets of every session in-memory, in order to create a reproducti= on script, as the timing (relativ to retransmission timeouts, persist and keepalive timers) of the clients packets apparently has something to do with this problem. --=20 You are receiving this mail because: You are on the CC list for the bug. You are the assignee for the bug.=