From owner-svn-src-all@freebsd.org Sat May 4 18:00:58 2019 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 5E89F1594825; Sat, 4 May 2019 18:00:58 +0000 (UTC) (envelope-from mckusick@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 0476B6B415; Sat, 4 May 2019 18:00:58 +0000 (UTC) (envelope-from mckusick@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 D41DFBEBC; Sat, 4 May 2019 18:00:57 +0000 (UTC) (envelope-from mckusick@FreeBSD.org) Received: from repo.freebsd.org ([127.0.1.37]) by repo.freebsd.org (8.15.2/8.15.2) with ESMTP id x44I0vne046789; Sat, 4 May 2019 18:00:57 GMT (envelope-from mckusick@FreeBSD.org) Received: (from mckusick@localhost) by repo.freebsd.org (8.15.2/8.15.2/Submit) id x44I0v1B046788; Sat, 4 May 2019 18:00:57 GMT (envelope-from mckusick@FreeBSD.org) Message-Id: <201905041800.x44I0v1B046788@repo.freebsd.org> X-Authentication-Warning: repo.freebsd.org: mckusick set sender to mckusick@FreeBSD.org using -f From: Kirk McKusick Date: Sat, 4 May 2019 18:00:57 +0000 (UTC) To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-head@freebsd.org Subject: svn commit: r347130 - head/sys/ufs/ufs X-SVN-Group: head X-SVN-Commit-Author: mckusick X-SVN-Commit-Paths: head/sys/ufs/ufs X-SVN-Commit-Revision: 347130 X-SVN-Commit-Repository: base MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit X-Rspamd-Queue-Id: 0476B6B415 X-Spamd-Bar: -- Authentication-Results: mx1.freebsd.org X-Spamd-Result: default: False [-2.98 / 15.00]; local_wl_from(0.00)[FreeBSD.org]; NEURAL_HAM_MEDIUM(-1.00)[-0.999,0]; NEURAL_HAM_SHORT(-0.98)[-0.978,0]; NEURAL_HAM_LONG(-1.00)[-1.000,0]; ASN(0.00)[asn:11403, ipnet:2610:1c1:1::/48, country:US] 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: Sat, 04 May 2019 18:00:58 -0000 Author: mckusick Date: Sat May 4 18:00:57 2019 New Revision: 347130 URL: https://svnweb.freebsd.org/changeset/base/347130 Log: Zero out the file directory entry metadata to reduce disk scavenging disclosure. Submitted by: David G. Lawrence MFC after: 1 week Modified: head/sys/ufs/ufs/ufs_lookup.c Modified: head/sys/ufs/ufs/ufs_lookup.c ============================================================================== --- head/sys/ufs/ufs/ufs_lookup.c Sat May 4 17:35:13 2019 (r347129) +++ head/sys/ufs/ufs/ufs_lookup.c Sat May 4 18:00:57 2019 (r347130) @@ -1218,16 +1218,21 @@ ufs_dirremove(dvp, ip, flags, isrmdir) if (ip && rep->d_ino != ip->i_number) panic("ufs_dirremove: ip %ju does not match dirent ino %ju\n", (uintmax_t)ip->i_number, (uintmax_t)rep->d_ino); - if (dp->i_count == 0) { + /* + * Zero out the file directory entry metadata to reduce disk + * scavenging disclosure. + */ + bzero(&rep->d_name[0], rep->d_namlen); + rep->d_namlen = 0; + rep->d_type = 0; + rep->d_ino = 0; + + if (dp->i_count != 0) { /* - * First entry in block: set d_ino to zero. - */ - ep->d_ino = 0; - } else { - /* * Collapse new free space into previous entry. */ ep->d_reclen += rep->d_reclen; + rep->d_reclen = 0; } #ifdef UFS_DIRHASH if (dp->i_dirhash != NULL)