From owner-svn-src-all@freebsd.org Sat May 20 00:42:48 2017 Return-Path: Delivered-To: svn-src-all@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 CE632D7336E; Sat, 20 May 2017 00:42:48 +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 mx1.freebsd.org (Postfix) with ESMTPS id A0621108E; Sat, 20 May 2017 00:42:48 +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 v4K0gltp014983; Sat, 20 May 2017 00:42:47 GMT (envelope-from emaste@FreeBSD.org) Received: (from emaste@localhost) by repo.freebsd.org (8.15.2/8.15.2/Submit) id v4K0glEV014982; Sat, 20 May 2017 00:42:47 GMT (envelope-from emaste@FreeBSD.org) Message-Id: <201705200042.v4K0glEV014982@repo.freebsd.org> X-Authentication-Warning: repo.freebsd.org: emaste set sender to emaste@FreeBSD.org using -f From: Ed Maste Date: Sat, 20 May 2017 00:42:47 +0000 (UTC) To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-head@freebsd.org Subject: svn commit: r318565 - head/usr.bin/grep X-SVN-Group: head MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit X-BeenThere: svn-src-all@freebsd.org X-Mailman-Version: 2.1.23 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, 20 May 2017 00:42:48 -0000 Author: emaste Date: Sat May 20 00:42:47 2017 New Revision: 318565 URL: https://svnweb.freebsd.org/changeset/base/318565 Log: bsdgrep: fix segfault with --mmap r313948 partially fixed --mmap behavior but was incomplete. This commit generally reverts it and does it the more correct way- by just consuming the rest of the buffer and moving on. PR: 219402 Submitted by: Kyle Evans Reviewed by: cem Differential Revision: https://reviews.freebsd.org/D10820 Modified: head/usr.bin/grep/file.c Modified: head/usr.bin/grep/file.c ============================================================================== --- head/usr.bin/grep/file.c Sat May 20 00:41:12 2017 (r318564) +++ head/usr.bin/grep/file.c Sat May 20 00:42:47 2017 (r318565) @@ -213,24 +213,24 @@ grep_fgetln(struct file *f, size_t *lenp if (grep_lnbufgrow(len + LNBUFBUMP)) goto error; memcpy(lnbuf + off, bufpos, len - off); + /* With FILE_MMAP, this is EOF; there's no more to refill */ + if (filebehave == FILE_MMAP) { + bufrem -= len; + break; + } off = len; + /* Fetch more to try and find EOL/EOF */ if (grep_refill(f) != 0) goto error; if (bufrem == 0) /* EOF: return partial line */ break; - if ((p = memchr(bufpos, fileeol, bufrem)) == NULL && - filebehave != FILE_MMAP) + if ((p = memchr(bufpos, fileeol, bufrem)) == NULL) continue; - if (p == NULL) { - /* mmap EOF: return partial line, consume buffer */ - diff = len; - } else { - /* got it: finish up the line (like code above) */ - ++p; - diff = p - bufpos; - len += diff; - } + /* got it: finish up the line (like code above) */ + ++p; + diff = p - bufpos; + len += diff; if (grep_lnbufgrow(len)) goto error; memcpy(lnbuf + off, bufpos, diff);