From owner-freebsd-bugs@freebsd.org Wed Sep 25 15:24:39 2019 Return-Path: Delivered-To: freebsd-bugs@mailman.nyi.freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2610:1c1:1:606c::19:1]) by mailman.nyi.freebsd.org (Postfix) with ESMTP id EBFFA12A676 for ; Wed, 25 Sep 2019 15:24:39 +0000 (UTC) (envelope-from bugzilla-noreply@freebsd.org) Received: from mailman.nyi.freebsd.org (unknown [127.0.1.3]) by mx1.freebsd.org (Postfix) with ESMTP id 46dhgW62xGz435J for ; Wed, 25 Sep 2019 15:24:39 +0000 (UTC) (envelope-from bugzilla-noreply@freebsd.org) Received: by mailman.nyi.freebsd.org (Postfix) id CDBC412A675; Wed, 25 Sep 2019 15:24:39 +0000 (UTC) Delivered-To: bugs@mailman.nyi.freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2610:1c1:1:606c::19:1]) by mailman.nyi.freebsd.org (Postfix) with ESMTP id CD7D212A674 for ; Wed, 25 Sep 2019 15:24:39 +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) server-signature RSA-PSS (4096 bits) client-signature RSA-PSS (4096 bits) client-digest SHA256) (Client CN "mxrelay.nyi.freebsd.org", Issuer "Let's Encrypt Authority X3" (verified OK)) by mx1.freebsd.org (Postfix) with ESMTPS id 46dhgW55Nxz435H for ; Wed, 25 Sep 2019 15:24:39 +0000 (UTC) (envelope-from bugzilla-noreply@freebsd.org) Received: from kenobi.freebsd.org (kenobi.freebsd.org [IPv6:2610:1c1:1:606c::50:1d]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (Client did not present a certificate) by mxrelay.nyi.freebsd.org (Postfix) with ESMTPS id 8DFEA19AE0 for ; Wed, 25 Sep 2019 15:24:39 +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 x8PFOdH5057963 for ; Wed, 25 Sep 2019 15:24:39 GMT (envelope-from bugzilla-noreply@freebsd.org) Received: (from www@localhost) by kenobi.freebsd.org (8.15.2/8.15.2/Submit) id x8PFOdck057927 for bugs@FreeBSD.org; Wed, 25 Sep 2019 15:24:39 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: bugs@FreeBSD.org Subject: [Bug 240819] PF scrub drop UDP Fragment Date: Wed, 25 Sep 2019 15:24:38 +0000 X-Bugzilla-Reason: AssignedTo X-Bugzilla-Type: new X-Bugzilla-Watch-Reason: None X-Bugzilla-Product: Base System X-Bugzilla-Component: kern X-Bugzilla-Version: 12.0-STABLE X-Bugzilla-Keywords: X-Bugzilla-Severity: Affects Many People X-Bugzilla-Who: fabrice.bruel@orange.com X-Bugzilla-Status: New X-Bugzilla-Resolution: X-Bugzilla-Priority: --- X-Bugzilla-Assigned-To: bugs@FreeBSD.org X-Bugzilla-Flags: X-Bugzilla-Changed-Fields: bug_id short_desc product version rep_platform op_sys bug_status bug_severity priority component assigned_to reporter Message-ID: Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable X-Bugzilla-URL: https://bugs.freebsd.org/bugzilla/ Auto-Submitted: auto-generated MIME-Version: 1.0 X-BeenThere: freebsd-bugs@freebsd.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Bug reports List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Wed, 25 Sep 2019 15:24:40 -0000 https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=3D240819 Bug ID: 240819 Summary: PF scrub drop UDP Fragment Product: Base System Version: 12.0-STABLE Hardware: amd64 OS: Any Status: New Severity: Affects Many People Priority: --- Component: kern Assignee: bugs@FreeBSD.org Reporter: fabrice.bruel@orange.com Hello, I've notice a problem with scrub and UDP packet on FreeBSD 12STABLE Version : # uname -a FreeBSD R640-4 12.0-STABLE FreeBSD 12.0-STABLE #1 r348036M: Tue May 21 10:5= 8:21 CEST 2019=20=20=20=20 root@PFWALL-GEN2:/usr/obj/PFWALL.amd64/usr/local/PFWall/FreeBSD/src/amd64.a= md64/sys/PFWALL-AMD64 amd64 Describe : If PF is activated with this scrub option : scrub out all random-id scrub all fragment reassemble UDP fragment doesn't cross PF. removing this 2 line solve the issue. Incoming packet seems to be "bad" in tcpdump : # tcpdump -n -i bxe3 udp tcpdump: verbose output suppressed, use -v or -vv for full protocol decode listening on bxe3, link-type EN10MB (Ethernet), capture size 262144 bytes 16:23:13.231094 IP 10.2.0.22.2798 > 10.2.0.221.0: UDP, bad length 1420 > 13= 92 16:23:13.231116 IP 10.2.0.22 > 10.2.0.221: ip-proto-17 16:23:14.292550 IP 10.2.0.22.2799 > 10.2.0.221.0: UDP, bad length 1420 > 13= 92 16:23:14.292572 IP 10.2.0.22 > 10.2.0.221: ip-proto-17 16:23:15.354955 IP 10.2.0.22.2800 > 10.2.0.221.0: UDP, bad length 1420 > 13= 92 Note that's the MTU of the egress interface (bxe3 here) is 1500 : # ifconfig bxe3 bxe3: flags=3D8843 metric 0 mtu 1500 =20=20=20=20=20=20=20 options=3D522ba I've tried to remove tso, rxcsum,tso, with no result. Maybe it's more a IP issue ? How to reproduce :=20 # hping -2 -m 1400 -d 1420 ip_target --=20 You are receiving this mail because: You are the assignee for the bug.=