From owner-svn-src-stable@freebsd.org Fri Mar 23 02:37:09 2018 Return-Path: Delivered-To: svn-src-stable@mailman.ysv.freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2610:1c1:1:606c::19:1]) by mailman.ysv.freebsd.org (Postfix) with ESMTP id 39A8FF623DC; Fri, 23 Mar 2018 02:37:09 +0000 (UTC) (envelope-from emaste@FreeBSD.org) Received: from mxrelay.nyi.freebsd.org (mxrelay.nyi.freebsd.org [IPv6:2610:1c1:1:606c::19:3]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (Client CN "mxrelay.nyi.freebsd.org", Issuer "Let's Encrypt Authority X3" (verified OK)) by mx1.freebsd.org (Postfix) with ESMTPS id DC2E57AF64; Fri, 23 Mar 2018 02:37:08 +0000 (UTC) (envelope-from emaste@FreeBSD.org) Received: from repo.freebsd.org (repo.freebsd.org [IPv6:2610:1c1:1:6068::e6a:0]) (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 D2AD919E6A; Fri, 23 Mar 2018 02:37:08 +0000 (UTC) (envelope-from emaste@FreeBSD.org) Received: from repo.freebsd.org ([127.0.1.37]) by repo.freebsd.org (8.15.2/8.15.2) with ESMTP id w2N2b8pr080938; Fri, 23 Mar 2018 02:37:08 GMT (envelope-from emaste@FreeBSD.org) Received: (from emaste@localhost) by repo.freebsd.org (8.15.2/8.15.2/Submit) id w2N2b8wn080937; Fri, 23 Mar 2018 02:37:08 GMT (envelope-from emaste@FreeBSD.org) Message-Id: <201803230237.w2N2b8wn080937@repo.freebsd.org> X-Authentication-Warning: repo.freebsd.org: emaste set sender to emaste@FreeBSD.org using -f From: Ed Maste Date: Fri, 23 Mar 2018 02:37:08 +0000 (UTC) To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-stable@freebsd.org, svn-src-stable-11@freebsd.org Subject: svn commit: r331411 - stable/11/sys/dev/drm X-SVN-Group: stable-11 X-SVN-Commit-Author: emaste X-SVN-Commit-Paths: stable/11/sys/dev/drm X-SVN-Commit-Revision: 331411 X-SVN-Commit-Repository: base MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit X-BeenThere: svn-src-stable@freebsd.org X-Mailman-Version: 2.1.25 Precedence: list List-Id: SVN commit messages for all the -stable branches of the src tree List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Fri, 23 Mar 2018 02:37:09 -0000 Author: emaste Date: Fri Mar 23 02:37:08 2018 New Revision: 331411 URL: https://svnweb.freebsd.org/changeset/base/331411 Log: MFC r331333: Fix kernel memory disclosure in drm_infobufs drm_infobufs() has a structure on the stack, fills it out and copies it to userland. There are 2 elements in the struct that are not filled out and left uninitialized. This will leak uninitialized kernel stack data to userland. Submitted by: Domagoj Stolfa Reported by: Ilja Van Sprundel Security: Kernel memory disclosure (798) Modified: stable/11/sys/dev/drm/drm_bufs.c Directory Properties: stable/11/ (props changed) Modified: stable/11/sys/dev/drm/drm_bufs.c ============================================================================== --- stable/11/sys/dev/drm/drm_bufs.c Fri Mar 23 02:34:45 2018 (r331410) +++ stable/11/sys/dev/drm/drm_bufs.c Fri Mar 23 02:37:08 2018 (r331411) @@ -935,6 +935,7 @@ int drm_infobufs(struct drm_device *dev, void *data, s if (dma->bufs[i].buf_count) { struct drm_buf_desc from; + memset(&from, 0, sizeof(from)); from.count = dma->bufs[i].buf_count; from.size = dma->bufs[i].buf_size; from.low_mark = dma->bufs[i].freelist.low_mark;