From nobody Wed Jun 15 10:05:35 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 98A438420F8 for ; Wed, 15 Jun 2022 10:05:35 +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 4LNLXb2cH0z3MKZ for ; Wed, 15 Jun 2022 10:05:35 +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 3727C1CA25 for ; Wed, 15 Jun 2022 10:05:35 +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 25FA5Zu1055562 for ; Wed, 15 Jun 2022 10:05:35 GMT (envelope-from bugzilla-noreply@freebsd.org) Received: (from www@localhost) by kenobi.freebsd.org (8.15.2/8.15.2/Submit) id 25FA5ZUU055561 for net@FreeBSD.org; Wed, 15 Jun 2022 10:05:35 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 10:05:35 +0000 X-Bugzilla-Reason: AssignedTo CC 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=1655287535; 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=B8JXHCYKiaSquJXzamfQKxqrSSmpUfNK1Pg91N5YD5c=; b=ixcv2zTNTaNYU9z1rfTYWuX+fMuvSxseORL7iR4PWcMgxr/aslZDyJ+I2awzMJyH6WdQW5 TyicbWSoIH2frQ8lG4XdU2MQJM3YL9cRRC5aiHPa7A2oHnBzFsXa0QVD1AvITDBKMPN+NO Phr0dyoSxe2mH2CAa4kIpJfS88IxTUMzCA6HfI9xwAuZdKi3Oa6evAl6d/gWtGJYy6TQ7+ 7pFE3S4Vj0bvQypm5pDOx/FDd/tNv5WTZ+gUiBIhvUPUikaxYh2VssRm570SEZdhx5WRtZ 03wODnLj4hBRfEZI3iqmCFDULqTNGWlaLzPiXhIQ3qSn9Qq6qEra/uA/Ht3YLg== ARC-Seal: i=1; s=dkim; d=freebsd.org; t=1655287535; a=rsa-sha256; cv=none; b=pK0wuJ+SfwNuhHtUqCf8OD68YFUXUQ9H1X15wPldrBiHQK8JF0wzwpA/DQTPAX2EVjLEQZ U9GW48WToZt7avdyfYAom7liUd5swcrA2BKsknoLFM/JBN+cdZjzKKSw8o3eVlnRGsY/k8 /ZsxrsHjonuwgXdC264uASd0didHsiAkpHoXKs6jbeMY5+67IDDp5Z+6Kb2p94q+uaa8DX ybBpOcOE0arK0WgxGQRm9gu54xdJ74ukvrW0DQ+/dwY7QhlR1XtC+qWEqqbeHvxr5B/kEz pMADAko1b7SOEfnDfQZcNbxTLjJauaUWgKI3NUdBids8MB1zUiC5IgUb7NQbnw== ARC-Authentication-Results: i=1; mx1.freebsd.org; none X-ThisMailContainsUnwantedMimeParts: N https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=3D264257 --- Comment #60 from Richard Scheffenegger --- (In reply to Christos Chatzaras from comment #57) Sorry for being unclear: A plain (unpatched) 13.1-RELEASE kernel with net.inet.tcp.rfc6675_pipe=3D0 = would not exhibit a panic. The patches added here really are to gather more information - and delibera= tely panic (when built with INVARIANTS) or retroactively adjust the incorrect TCP state. Stable operation in a production environment would only need the standard kernel, and it's safe to use SACK as long as rfc6675_pipe is not enabled. (The root cause - apparent double-accounting for FIN bits, and possibly even sending FIN bits at two different, final sequence numbers - would still be present, but not cause a crash). --=20 You are receiving this mail because: You are the assignee for the bug. You are on the CC list for the bug.=