From owner-svn-src-all@freebsd.org Tue Dec 4 21:48:57 2018 Return-Path: Delivered-To: svn-src-all@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 397B31322A4C; Tue, 4 Dec 2018 21:48:57 +0000 (UTC) (envelope-from sobomax@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 D3BC873C21; Tue, 4 Dec 2018 21:48:56 +0000 (UTC) (envelope-from sobomax@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 AC23C2FA0; Tue, 4 Dec 2018 21:48:56 +0000 (UTC) (envelope-from sobomax@FreeBSD.org) Received: from repo.freebsd.org ([127.0.1.37]) by repo.freebsd.org (8.15.2/8.15.2) with ESMTP id wB4LmuaQ083136; Tue, 4 Dec 2018 21:48:56 GMT (envelope-from sobomax@FreeBSD.org) Received: (from sobomax@localhost) by repo.freebsd.org (8.15.2/8.15.2/Submit) id wB4Lmuao083135; Tue, 4 Dec 2018 21:48:56 GMT (envelope-from sobomax@FreeBSD.org) Message-Id: <201812042148.wB4Lmuao083135@repo.freebsd.org> X-Authentication-Warning: repo.freebsd.org: sobomax set sender to sobomax@FreeBSD.org using -f From: Maxim Sobolev Date: Tue, 4 Dec 2018 21:48:56 +0000 (UTC) To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-head@freebsd.org Subject: svn commit: r341494 - head/sys/geom X-SVN-Group: head X-SVN-Commit-Author: sobomax X-SVN-Commit-Paths: head/sys/geom X-SVN-Commit-Revision: 341494 X-SVN-Commit-Repository: base MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit X-Rspamd-Queue-Id: D3BC873C21 X-Spamd-Result: default: False [-0.03 / 15.00]; local_wl_from(0.00)[FreeBSD.org]; NEURAL_HAM_MEDIUM(-0.48)[-0.476,0]; NEURAL_SPAM_SHORT(0.52)[0.516,0]; NEURAL_HAM_LONG(-0.07)[-0.072,0]; ASN(0.00)[asn:11403, ipnet:2610:1c1:1::/48, country:US] X-Rspamd-Server: mx1.freebsd.org X-BeenThere: svn-src-all@freebsd.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: "SVN commit messages for the entire src tree \(except for " user" and " projects" \)" List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Tue, 04 Dec 2018 21:48:57 -0000 Author: sobomax Date: Tue Dec 4 21:48:56 2018 New Revision: 341494 URL: https://svnweb.freebsd.org/changeset/base/341494 Log: Another attempt to fix issue with the DIOCGDELETE ioctl(2) not handling slightly out-of-bound requests properly (r340187). Perform range check here rather then rely on g_delete_data() to DTRT. The g_delete_data() would always return success for requests starting just the next byte after providers media boundary. MFC after: 4 weeks Modified: head/sys/geom/geom_dev.c Modified: head/sys/geom/geom_dev.c ============================================================================== --- head/sys/geom/geom_dev.c Tue Dec 4 20:40:28 2018 (r341493) +++ head/sys/geom/geom_dev.c Tue Dec 4 21:48:56 2018 (r341494) @@ -583,6 +583,20 @@ g_dev_ioctl(struct cdev *dev, u_long cmd, caddr_t data error = EINVAL; break; } + if ((cp->provider->mediasize > 0) && + (offset >= cp->provider->mediasize)) { + /* + * Catch out-of-bounds requests here. The problem is + * that due to historical GEOM I/O implementation + * peculatities, g_delete_data() would always return + * success for requests starting just the next byte + * after providers media boundary. Condition check on + * non-zero media size, since that condition would + * (most likely) cause ENXIO instead. + */ + error = EIO; + break; + } while (length > 0) { chunk = length; if (g_dev_del_max_sectors != 0 && chunk >