From owner-svn-src-head@freebsd.org Tue Jan 10 20:52:45 2017 Return-Path: Delivered-To: svn-src-head@mailman.ysv.freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:1900:2254:206a::19:1]) by mailman.ysv.freebsd.org (Postfix) with ESMTP id 7F442CA9567; Tue, 10 Jan 2017 20:52:45 +0000 (UTC) (envelope-from mav@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 mx1.freebsd.org (Postfix) with ESMTPS id 351E610D9; Tue, 10 Jan 2017 20:52:45 +0000 (UTC) (envelope-from mav@FreeBSD.org) Received: from repo.freebsd.org ([127.0.1.37]) by repo.freebsd.org (8.15.2/8.15.2) with ESMTP id v0AKqiTw077568; Tue, 10 Jan 2017 20:52:44 GMT (envelope-from mav@FreeBSD.org) Received: (from mav@localhost) by repo.freebsd.org (8.15.2/8.15.2/Submit) id v0AKqikj077567; Tue, 10 Jan 2017 20:52:44 GMT (envelope-from mav@FreeBSD.org) Message-Id: <201701102052.v0AKqikj077567@repo.freebsd.org> X-Authentication-Warning: repo.freebsd.org: mav set sender to mav@FreeBSD.org using -f From: Alexander Motin Date: Tue, 10 Jan 2017 20:52:44 +0000 (UTC) To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-head@freebsd.org Subject: svn commit: r311897 - head/sbin/camcontrol X-SVN-Group: head MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit X-BeenThere: svn-src-head@freebsd.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: SVN commit messages for the src tree for head/-current List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Tue, 10 Jan 2017 20:52:45 -0000 Author: mav Date: Tue Jan 10 20:52:44 2017 New Revision: 311897 URL: https://svnweb.freebsd.org/changeset/base/311897 Log: Add checks for received mode page length. If our buffer is too small, we may receive part of the page, and should not try read/write past the end of the buffer. Reported by: Coverity CID: 1368374, 1368375 MFC after: 1 week Modified: head/sbin/camcontrol/modeedit.c Modified: head/sbin/camcontrol/modeedit.c ============================================================================== --- head/sbin/camcontrol/modeedit.c Tue Jan 10 20:44:31 2017 (r311896) +++ head/sbin/camcontrol/modeedit.c Tue Jan 10 20:52:44 2017 (r311897) @@ -557,7 +557,7 @@ editlist_populate(struct cam_device *dev struct scsi_mode_header_6 *mh; /* Location of mode header. */ struct scsi_mode_page_header *mph; struct scsi_mode_page_header_sp *mphsp; - int len; + size_t len; STAILQ_INIT(&editlist); @@ -575,6 +575,7 @@ editlist_populate(struct cam_device *dev mode_pars = (uint8_t *)(mphsp + 1); len = scsi_2btoul(mphsp->page_length); } + len = MIN(len, sizeof(data) - (mode_pars - data)); /* Decode the value data, creating edit_entries for each value. */ buff_decode_visit(mode_pars, len, format, editentry_create, 0); @@ -594,7 +595,7 @@ editlist_save(struct cam_device *device, struct scsi_mode_header_6 *mh; /* Location of mode header. */ struct scsi_mode_page_header *mph; struct scsi_mode_page_header_sp *mphsp; - int len, hlen; + size_t len, hlen; /* Make sure that something changed before continuing. */ if (! editlist_changed) @@ -617,6 +618,7 @@ editlist_save(struct cam_device *device, mode_pars = (uint8_t *)(mphsp + 1); len = scsi_2btoul(mphsp->page_length); } + len = MIN(len, sizeof(data) - (mode_pars - data)); /* Encode the value data to be passed back to the device. */ buff_encode_visit(mode_pars, len, format, editentry_save, 0); @@ -814,7 +816,7 @@ modepage_dump(struct cam_device *device, struct scsi_mode_header_6 *mh; /* Location of mode header. */ struct scsi_mode_page_header *mph; struct scsi_mode_page_header_sp *mphsp; - int indx, len; + size_t indx, len; mode_sense(device, dbd, pc, page, subpage, retries, timeout, data, sizeof(data)); @@ -829,6 +831,7 @@ modepage_dump(struct cam_device *device, mode_pars = (uint8_t *)(mphsp + 1); len = scsi_2btoul(mphsp->page_length); } + len = MIN(len, sizeof(data) - (mode_pars - data)); /* Print the raw mode page data with newlines each 8 bytes. */ for (indx = 0; indx < len; indx++) {