From nobody Wed Oct 02 16:53:18 2024 X-Original-To: dev-commits-src-main@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 4XJgqQ2yjkz5Xmv0; Wed, 02 Oct 2024 16:53:22 +0000 (UTC) (envelope-from cy.schubert@cschubert.com) Received: from omta002.cacentral1.a.cloudfilter.net (omta002.cacentral1.a.cloudfilter.net [3.97.99.33]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (Client CN "Client", Issuer "CA" (not verified)) by mx1.freebsd.org (Postfix) with ESMTPS id 4XJgqP3Jymz4DsL; Wed, 2 Oct 2024 16:53:21 +0000 (UTC) (envelope-from cy.schubert@cschubert.com) Authentication-Results: mx1.freebsd.org; none Received: from shw-obgw-4001a.ext.cloudfilter.net ([10.228.9.142]) by cmsmtp with ESMTPS id vywps65ayMArNw2bIsFgZr; Wed, 02 Oct 2024 16:53:20 +0000 Received: from spqr.komquats.com ([70.66.152.170]) by cmsmtp with ESMTPSA id w2bHsMjaXGvSVw2bIs23kO; Wed, 02 Oct 2024 16:53:20 +0000 X-Auth-User: cschuber X-Authority-Analysis: v=2.4 cv=FpSm/Hrq c=1 sm=1 tr=0 ts=66fd7a80 a=y8EK/9tc/U6QY+pUhnbtgQ==:117 a=y8EK/9tc/U6QY+pUhnbtgQ==:17 a=IkcTkHD0fZMA:10 a=DAUX931o1VcA:10 a=6I5d2MoRAAAA:8 a=YxBL1-UpAAAA:8 a=EkcXrb_YAAAA:8 a=gj-MK6H-zlxleXcIoy4A:9 a=3ZKOabzyN94A:10 a=QEXdDO2ut3YA:10 a=Ia-lj3WSrqcvXOmTRaiG:22 a=LK5xJRSDVpKd5WXXoEvA:22 Received: from slippy.cwsent.com (slippy [10.1.1.91]) by spqr.komquats.com (Postfix) with ESMTP id B1F0F284; Wed, 02 Oct 2024 09:53:18 -0700 (PDT) Received: by slippy.cwsent.com (Postfix, from userid 1000) id AA05628D; Wed, 02 Oct 2024 09:53:18 -0700 (PDT) X-Mailer: exmh version 2.9.0 11/07/2018 with nmh-1.8+dev Reply-to: Cy Schubert From: Cy Schubert X-os: FreeBSD X-Sender: cy@cwsent.com X-URL: http://www.cschubert.com/ To: Bojan =?utf-8?Q?Novkovi=C4=87?= cc: src-committers@FreeBSD.org, dev-commits-src-all@FreeBSD.org, dev-commits-src-main@FreeBSD.org Subject: Re: git: 51fda658baa3 - main - vmm: Properly handle writes spanning across two pages in vm_handle_db In-reply-to: <202410021645.492Gj4Sb035939@gitrepo.freebsd.org> References: <202410021645.492Gj4Sb035939@gitrepo.freebsd.org> Comments: In-reply-to Bojan =?utf-8?Q?Novkovi=C4=87?= message dated "Wed, 02 Oct 2024 16:45:04 +0000." List-Id: Commit messages for the main branch of the src repository List-Archive: https://lists.freebsd.org/archives/dev-commits-src-main List-Help: List-Post: List-Subscribe: List-Unsubscribe: X-BeenThere: dev-commits-src-main@freebsd.org Sender: owner-dev-commits-src-main@FreeBSD.org Mime-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: 8bit Date: Wed, 02 Oct 2024 09:53:18 -0700 Message-Id: <20241002165318.AA05628D@slippy.cwsent.com> X-CMAE-Envelope: MS4xfJabPpCMrcY6bIy/JaczWDhwEiAff7G+IJTXsRqzQ41jp9014E+5PalOSZpfhuzA2tGm6i/M/U/3HXurXUMjKPpXFe1/+7HR4OKqVjzzORt4szZdrvb4 0VDCCkrA7ixlZUPIXTjtXTsN3icnfd5f2W6QFeFHgE6W+nzV5jxoeDMPsUW9DVFMYR9q2OBITO/snMYmDo8q3XrCBo6N1RhOc6gIZh+YVrJnGa/NTrIygxuF Ge7lJpVy7DGnGupSNR824v/lE8obVcZkwW7CsY40phbKYygRQ6jR+M2PogV6GJkMOPF/RCfdeE2a9scn6bc93FShc/sm3gI5+56NEa0GSUs= X-Rspamd-Pre-Result: action=no action; module=replies; Message is reply to one we originated X-Spamd-Result: default: False [-4.00 / 15.00]; REPLY(-4.00)[]; ASN(0.00)[asn:16509, ipnet:3.96.0.0/15, country:US] X-Rspamd-Queue-Id: 4XJgqP3Jymz4DsL X-Spamd-Bar: ---- In message <202410021645.492Gj4Sb035939@gitrepo.freebsd.org>, Bojan =?utf-8?Q?N ovkovi=C4=87?= writes: > The branch main has been updated by bnovkov: > > URL: https://cgit.FreeBSD.org/src/commit/?id=51fda658baa3f80c9778f3a9873fbf67 > df87119b > > commit 51fda658baa3f80c9778f3a9873fbf67df87119b > Author: Bojan Novković > AuthorDate: 2024-09-29 11:10:10 +0000 > Commit: Bojan Novković > CommitDate: 2024-10-02 16:43:36 +0000 > > vmm: Properly handle writes spanning across two pages in vm_handle_db > > The vm_handle_db function is responsible for writing correct status > register values into memory when a guest VM is being single-stepped > using the RFLAGS.TF mechanism. However, it currently does not properly > handle an edge case where the resulting write spans across two pages. > This commit fixes this by making vm_handle_db use two vm_copy_info > structs. > > Security: HYP-09 Where can we find this vulnerability documented? -- Cheers, Cy Schubert FreeBSD UNIX: Web: https://FreeBSD.org NTP: Web: https://nwtime.org e^(i*pi)+1=0