From owner-svn-src-head@freebsd.org Tue Mar 27 21:06:19 2018 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 3F6A3F5C2F1; Tue, 27 Mar 2018 21:06:19 +0000 (UTC) (envelope-from brooks@FreeBSD.org) Received: from mxrelay.nyi.freebsd.org (mxrelay.nyi.freebsd.org [IPv6:2610:1c1:1:606c::19:3]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (Client CN "mxrelay.nyi.freebsd.org", Issuer "Let's Encrypt Authority X3" (verified OK)) by mx1.freebsd.org (Postfix) with ESMTPS id 0B56A815BE; Tue, 27 Mar 2018 21:06:19 +0000 (UTC) (envelope-from brooks@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 0572F2168B; Tue, 27 Mar 2018 21:06:19 +0000 (UTC) (envelope-from brooks@FreeBSD.org) Received: from repo.freebsd.org ([127.0.1.37]) by repo.freebsd.org (8.15.2/8.15.2) with ESMTP id w2RL6Igl074028; Tue, 27 Mar 2018 21:06:18 GMT (envelope-from brooks@FreeBSD.org) Received: (from brooks@localhost) by repo.freebsd.org (8.15.2/8.15.2/Submit) id w2RL6In2074027; Tue, 27 Mar 2018 21:06:18 GMT (envelope-from brooks@FreeBSD.org) Message-Id: <201803272106.w2RL6In2074027@repo.freebsd.org> X-Authentication-Warning: repo.freebsd.org: brooks set sender to brooks@FreeBSD.org using -f From: Brooks Davis Date: Tue, 27 Mar 2018 21:06:18 +0000 (UTC) To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-head@freebsd.org Subject: svn commit: r331653 - head/sys/dev/sbni X-SVN-Group: head X-SVN-Commit-Author: brooks X-SVN-Commit-Paths: head/sys/dev/sbni X-SVN-Commit-Revision: 331653 X-SVN-Commit-Repository: base 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: 2.1.25 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, 27 Mar 2018 21:06:19 -0000 Author: brooks Date: Tue Mar 27 21:06:18 2018 New Revision: 331653 URL: https://svnweb.freebsd.org/changeset/base/331653 Log: Copy flags over ifr_union directly rather than via casts through ifr_data. No functional change in practice. If the sbni driver supported 64-bit big-endian system, this would be an ABI changes, but it is i386-only. The old version leaked a word of stack on 64-bit systems. This eliminates the only assignment to ifr_data. Reviewed by: kib MFC after: 1 week Sponsored by: DARPA, AFRL Differential Revision: https://reviews.freebsd.org/D14874 Modified: head/sys/dev/sbni/if_sbni.c Modified: head/sys/dev/sbni/if_sbni.c ============================================================================== --- head/sys/dev/sbni/if_sbni.c Tue Mar 27 21:04:54 2018 (r331652) +++ head/sys/dev/sbni/if_sbni.c Tue Mar 27 21:06:18 2018 (r331653) @@ -1144,7 +1144,7 @@ sbni_ioctl(struct ifnet *ifp, u_long command, caddr_t flags.fixed_rxl = (sc->delta_rxl == 0); flags.fixed_rate = 1; SBNI_UNLOCK(sc); - ifr->ifr_data = *(caddr_t*) &flags; + bcopy(&flags, &ifr->ifr_ifru, sizeof(flags)); break; case SIOCGINSTATS: @@ -1163,7 +1163,7 @@ sbni_ioctl(struct ifnet *ifp, u_long command, caddr_t error = priv_check(td, PRIV_DRIVER); if (error) break; - flags = *(struct sbni_flags*)&ifr->ifr_data; + bcopy(&ifr->ifr_ifru, &flags, sizeof(flags)); SBNI_LOCK(sc); if (flags.fixed_rxl) { sc->delta_rxl = 0;