From owner-freebsd-bugs@FreeBSD.ORG Mon Sep 15 06:16:21 2014 Return-Path: Delivered-To: freebsd-bugs@FreeBSD.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:1900:2254:206a::19:1]) (using TLSv1 with cipher ADH-AES256-SHA (256/256 bits)) (No client certificate requested) by hub.freebsd.org (Postfix) with ESMTPS id C97ECD6 for ; Mon, 15 Sep 2014 06:16:21 +0000 (UTC) Received: from kenobi.freebsd.org (kenobi.freebsd.org [IPv6:2001:1900:2254:206a::16:76]) (using TLSv1 with cipher DHE-RSA-AES256-SHA (256/256 bits)) (Client did not present a certificate) by mx1.freebsd.org (Postfix) with ESMTPS id 97CAFEE8 for ; Mon, 15 Sep 2014 06:16:21 +0000 (UTC) Received: from bugs.freebsd.org ([127.0.1.118]) by kenobi.freebsd.org (8.14.9/8.14.9) with ESMTP id s8F6GL6X005397 for ; Mon, 15 Sep 2014 06:16:21 GMT (envelope-from bugzilla-noreply@freebsd.org) From: bugzilla-noreply@freebsd.org To: freebsd-bugs@FreeBSD.org Subject: [Bug 193649] New: ring->nr_buf_size will be calculated wrongly on PPC machine Date: Mon, 15 Sep 2014 06:16:21 +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: 10.0-STABLE X-Bugzilla-Keywords: X-Bugzilla-Severity: Affects Some People X-Bugzilla-Who: thomasyang1206@126.com X-Bugzilla-Status: Needs Triage X-Bugzilla-Priority: --- X-Bugzilla-Assigned-To: freebsd-bugs@FreeBSD.org X-Bugzilla-Target-Milestone: --- 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 attachments.created 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: 2.1.18-1 Precedence: list List-Id: Bug reports List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Mon, 15 Sep 2014 06:16:21 -0000 https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=3D193649 Bug ID: 193649 Summary: ring->nr_buf_size will be calculated wrongly on PPC machine Product: Base System Version: 10.0-STABLE Hardware: ppc OS: Any Status: Needs Triage Severity: Affects Some People Priority: --- Component: kern Assignee: freebsd-bugs@FreeBSD.org Reporter: thomasyang1206@126.com Created attachment 147337 --> https://bugs.freebsd.org/bugzilla/attachment.cgi?id=3D147337&action= =3Dedit the first part log contains the bug with TX nr_buf_size =3D 0x8000000, the = second part log is the correct one without bug When run netmap APP pkt-gen on PPC machine, say Freescale P4080, the buf si= ze of ring ring->nr_buf_size in "netmap_mem2.c, netmap_mem_rings_create()". The declaration of nr_buf_size in struct netmap_ring is uint32_t, however it is changed to uint16_t as following: *(uint16_t *)(uintptr_t)&ring->nr_buf_size =3D NETMAP_BDG_BUF_SIZE(na->nm_mem); Thus buffer size will be different as the desired, and will cause Segmentation fault. after changing it as: *(uint32_t *)(uintptr_t)&ring->nr_buf_size =3D NETMAP_BDG_BUF_SIZE(na->nm_mem); it works well on PPC=E3=80=82 The log is attached, please find it, pay attention to the buf_nr_size v= alue between the two parts log section. --=20 You are receiving this mail because: You are the assignee for the bug.=