From owner-svn-src-all@freebsd.org Sun Feb 17 17:47:09 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 73E5C14D715B; Sun, 17 Feb 2019 17:47:09 +0000 (UTC) (envelope-from pkelsey@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 14C1E77ABD; Sun, 17 Feb 2019 17:47:09 +0000 (UTC) (envelope-from pkelsey@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 048E721B6C; Sun, 17 Feb 2019 17:47:09 +0000 (UTC) (envelope-from pkelsey@FreeBSD.org) Received: from repo.freebsd.org ([127.0.1.37]) by repo.freebsd.org (8.15.2/8.15.2) with ESMTP id x1HHl8n5074436; Sun, 17 Feb 2019 17:47:08 GMT (envelope-from pkelsey@FreeBSD.org) Received: (from pkelsey@localhost) by repo.freebsd.org (8.15.2/8.15.2/Submit) id x1HHl8A7074435; Sun, 17 Feb 2019 17:47:08 GMT (envelope-from pkelsey@FreeBSD.org) Message-Id: <201902171747.x1HHl8A7074435@repo.freebsd.org> X-Authentication-Warning: repo.freebsd.org: pkelsey set sender to pkelsey@FreeBSD.org using -f From: Patrick Kelsey Date: Sun, 17 Feb 2019 17:47:08 +0000 (UTC) To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-head@freebsd.org Subject: svn commit: r344234 - head/stand/libsa/zfs X-SVN-Group: head X-SVN-Commit-Author: pkelsey X-SVN-Commit-Paths: head/stand/libsa/zfs X-SVN-Commit-Revision: 344234 X-SVN-Commit-Repository: base MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit X-Rspamd-Queue-Id: 14C1E77ABD 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)[-0.998,0]; NEURAL_HAM_SHORT(-0.96)[-0.964,0]; ASN(0.00)[asn:11403, ipnet:2610:1c1:1::/48, country:US]; NEURAL_HAM_LONG(-1.00)[-0.999,0] 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: Sun, 17 Feb 2019 17:47:09 -0000 Author: pkelsey Date: Sun Feb 17 17:47:08 2019 New Revision: 344234 URL: https://svnweb.freebsd.org/changeset/base/344234 Log: It turns out r344226 narrowed the overrun bug but did not eliminate it entirely This commit fixes a remaining output buffer overrun in the single-sector case when there is a non-zero tail. Reviewed by: allanjude, tsoome MFC after: 3 months MFC with: r344226 Differential Revision: https://reviews.freebsd.org/D19220 Modified: head/stand/libsa/zfs/zfs.c Modified: head/stand/libsa/zfs/zfs.c ============================================================================== --- head/stand/libsa/zfs/zfs.c Sun Feb 17 16:56:41 2019 (r344233) +++ head/stand/libsa/zfs/zfs.c Sun Feb 17 17:47:08 2019 (r344234) @@ -435,8 +435,8 @@ vdev_read(vdev_t *vdev, void *priv, off_t offset, void ret = EIO; goto error; } - memcpy(outbuf, bouncebuf + head, secsz - head); - outbuf += secsz - head; + memcpy(outbuf, bouncebuf + head, min(secsz - head, bytes)); + outbuf += min(secsz - head, bytes); } /* Full data return from read sectors */