From owner-svn-src-head@freebsd.org Mon Jun 24 17:25:15 2019 Return-Path: Delivered-To: svn-src-head@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 2C40415D38C3; Mon, 24 Jun 2019 17:25:15 +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 TLSv1.3 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 C197977664; Mon, 24 Jun 2019 17:25:14 +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 986E3434F; Mon, 24 Jun 2019 17:25:14 +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 x5OHPEfW057349; Mon, 24 Jun 2019 17:25:14 GMT (envelope-from emaste@FreeBSD.org) Received: (from emaste@localhost) by repo.freebsd.org (8.15.2/8.15.2/Submit) id x5OHPE3f057348; Mon, 24 Jun 2019 17:25:14 GMT (envelope-from emaste@FreeBSD.org) Message-Id: <201906241725.x5OHPE3f057348@repo.freebsd.org> X-Authentication-Warning: repo.freebsd.org: emaste set sender to emaste@FreeBSD.org using -f From: Ed Maste Date: Mon, 24 Jun 2019 17:25:14 +0000 (UTC) To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-head@freebsd.org Subject: svn commit: r349333 - head/usr.bin/vtfontcvt X-SVN-Group: head X-SVN-Commit-Author: emaste X-SVN-Commit-Paths: head/usr.bin/vtfontcvt X-SVN-Commit-Revision: 349333 X-SVN-Commit-Repository: base MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit X-Rspamd-Queue-Id: C197977664 X-Spamd-Bar: -- Authentication-Results: mx1.freebsd.org X-Spamd-Result: default: False [-2.96 / 15.00]; local_wl_from(0.00)[FreeBSD.org]; NEURAL_HAM_MEDIUM(-1.00)[-0.999,0]; NEURAL_HAM_SHORT(-0.96)[-0.957,0]; NEURAL_HAM_LONG(-1.00)[-1.000,0]; ASN(0.00)[asn:11403, ipnet:2610:1c1:1::/48, country:US] X-BeenThere: svn-src-head@freebsd.org X-Mailman-Version: 2.1.29 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: Mon, 24 Jun 2019 17:25:15 -0000 Author: emaste Date: Mon Jun 24 17:25:14 2019 New Revision: 349333 URL: https://svnweb.freebsd.org/changeset/base/349333 Log: vtfontcvt: improve .bdf validation Previously if we had a FONTBOUNDINGBOX or DWIDTH entry that had missing or invalid values and and failed sscanf, we would proceeded with partially initialized bounding box / device width variables. Reported by: afl (FONTBOUNDINGBOX) MFC with: r349100 Sponsored by: The FreeBSD Foundation Modified: head/usr.bin/vtfontcvt/vtfontcvt.c Modified: head/usr.bin/vtfontcvt/vtfontcvt.c ============================================================================== --- head/usr.bin/vtfontcvt/vtfontcvt.c Mon Jun 24 17:05:31 2019 (r349332) +++ head/usr.bin/vtfontcvt/vtfontcvt.c Mon Jun 24 17:25:14 2019 (r349333) @@ -335,9 +335,11 @@ parse_bdf(FILE *fp, unsigned int map_idx) break; } } - } else if (strncmp(ln, "FONTBOUNDINGBOX ", 16) == 0 && - sscanf(ln + 16, "%d %d %d %d", &fbbw, &fbbh, &fbbox, - &fbboy) == 4) { + } else if (strncmp(ln, "FONTBOUNDINGBOX ", 16) == 0) { + if (sscanf(ln + 16, "%d %d %d %d", &fbbw, &fbbh, &fbbox, + &fbboy) != 4) + errx(1, "invalid FONTBOUNDINGBOX at line %u", + linenum); set_width(fbbw); set_height(fbbh); break; @@ -353,8 +355,9 @@ parse_bdf(FILE *fp, unsigned int map_idx) linenum++; ln[length - 1] = '\0'; - if (strncmp(ln, "DWIDTH ", 7) == 0 && - sscanf(ln + 7, "%d %d", &dwidth, &dwy) == 2) { + if (strncmp(ln, "DWIDTH ", 7) == 0) { + if (sscanf(ln + 7, "%d %d", &dwidth, &dwy) != 2) + errx(1, "invalid DWIDTH at line %u", linenum); if (dwy != 0 || (dwidth != fbbw && dwidth * 2 != fbbw)) errx(1, "bitmap with unsupported DWIDTH %d %d at line %u", dwidth, dwy, linenum);