From nobody Mon Dec 18 11:17:48 2023 X-Original-To: transport@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 4Sty3d0KCHz54M3J for ; Mon, 18 Dec 2023 11:17:49 +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 4Sty3c6JCWz4Q8f for ; Mon, 18 Dec 2023 11:17:48 +0000 (UTC) (envelope-from bugzilla-noreply@freebsd.org) ARC-Seal: i=1; s=dkim; d=freebsd.org; t=1702898268; a=rsa-sha256; cv=none; b=q5KJ4RclbyHHLCqWFvegSzSsC+T5H/OAGb8OqaLTmSs4HOhGUW/dOGLxeoU5FcJMGpVnal fNndiIvPZ3lHzh/MVhe0l8yxxr6vV030YVQYaB/PFmw2AIl4okUE4enVJ/jJy608veqHYS TDLzD0lTOcm4UnUCvE70i+iD/DApKjGZaKr1ujgYbQ8uDjX4vKkTPEEwUwbqsaVuwwOD2B 9MrJYAY0YGupBF+j0Yg+4oXbWtkZq33U2YH+7ggSO1BhRAxCw8pVKPZK92OUnqy8bvhCA7 tyYNZvGeGzOG1yZsIPnsTVvuTXkr51mkeYF7/p5j2HHr3guGC3pMnt6jTBgNmA== ARC-Authentication-Results: i=1; mx1.freebsd.org; none ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=freebsd.org; s=dkim; t=1702898268; 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=8MyAQ0nDtiJ/Aw3GJ3Aib3+TpEb8TWW9Kn2FjqKFun0=; b=QNgDUzfzgkQd8zf4pMpe9IFANHfZFxWD/oJjl4gCfCd/eDG8M0Tl367qm7WJg4UdM0Fwo4 qo/o0MSS/+pNmrSXIVBOTT2+7jq6hR6dE08SbXWwwFV3ruWPipElZYLi9WPJNDyd867eKP Nb01vjscKmdeRW39k9rS7V2S4WIM6vRagY1X58oEqHggljuYwvVP1We8eDRriFIIXOyBvm nvQQ2QdlcAqOBooKyK1hGzLD91clq4bayO4Def4TN86xM51NZ3vaIP8XUJYFxgw6g9uu2w SjoXAQn1ZazMUqdhO1G8XTg6npXm2a4v3Vljr6wSpcvZOdAskE2h74ov2T09iA== 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 4Sty3c5FZSz3hD for ; Mon, 18 Dec 2023 11:17:48 +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 3BIBHmvv094098 for ; Mon, 18 Dec 2023 11:17:48 GMT (envelope-from bugzilla-noreply@freebsd.org) Received: (from www@localhost) by kenobi.freebsd.org (8.15.2/8.15.2/Submit) id 3BIBHmox094097 for transport@FreeBSD.org; Mon, 18 Dec 2023 11:17:48 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: transport@FreeBSD.org Subject: [Bug 275798] panic: sackhint bytes rtx >= 0 Date: Mon, 18 Dec 2023 11:17:48 +0000 X-Bugzilla-Reason: CC X-Bugzilla-Type: changed X-Bugzilla-Watch-Reason: None X-Bugzilla-Product: Base System X-Bugzilla-Component: kern X-Bugzilla-Version: CURRENT X-Bugzilla-Keywords: X-Bugzilla-Severity: Affects Some People X-Bugzilla-Who: rscheff@freebsd.org X-Bugzilla-Status: New X-Bugzilla-Resolution: X-Bugzilla-Priority: --- X-Bugzilla-Assigned-To: rscheff@freebsd.org X-Bugzilla-Flags: 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: Discussions List-Archive: https://lists.freebsd.org/archives/freebsd-transport List-Help: List-Post: List-Subscribe: List-Unsubscribe: Sender: owner-freebsd-transport@freebsd.org X-BeenThere: freebsd-transport@freebsd.org MIME-Version: 1.0 https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=3D275798 --- Comment #6 from Richard Scheffenegger --- can you please provide the core (w/ kernel & kernel.debug)? The bblog data = will have captured the evolution how we ended up in this state - but it currently requires the core to undig all that information manually. And I spotted an oversight in the tcp_output error path, but that's not the issue here...=20 But the problem happens quite early in the affected TCP session: iss =3D 331585966 recover =3D 14492=20 fack =3D 14492 una =3D 10936 max =3D 14492 in frame 6, the incoming tcp header option sack appears to cover: 11171-12164(993) in frame 5, the sack block seems to cover the entire range from una to max (10936-14492) - but this is probably after processing it in full. The sack_bytes_rexmit is -235, or the delta between snd_una and the left ed= ge of the to_sack block... I wonder if this is a DSACK block on a cumulative ack, after the holes have been retransmitted, ending up miscalculating this.. (So with reordering of packet delivery or ACKs carrying SACK information). --=20 You are receiving this mail because: You are on the CC list for the bug.=