From owner-svn-src-all@freebsd.org Sun Apr 26 16:13:51 2020 Return-Path: Delivered-To: svn-src-all@mailman.nyi.freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2610:1c1:1:606c::19:1]) by mailman.nyi.freebsd.org (Postfix) with ESMTP id 6EFA12B4656; Sun, 26 Apr 2020 16:13:51 +0000 (UTC) (envelope-from kp@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 499CdW2Gf6z4fS1; Sun, 26 Apr 2020 16:13:51 +0000 (UTC) (envelope-from kp@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 49192238F3; Sun, 26 Apr 2020 16:13:51 +0000 (UTC) (envelope-from kp@FreeBSD.org) Received: from repo.freebsd.org ([127.0.1.37]) by repo.freebsd.org (8.15.2/8.15.2) with ESMTP id 03QGDpvu095252; Sun, 26 Apr 2020 16:13:51 GMT (envelope-from kp@FreeBSD.org) Received: (from kp@localhost) by repo.freebsd.org (8.15.2/8.15.2/Submit) id 03QGDpbB095251; Sun, 26 Apr 2020 16:13:51 GMT (envelope-from kp@FreeBSD.org) Message-Id: <202004261613.03QGDpbB095251@repo.freebsd.org> X-Authentication-Warning: repo.freebsd.org: kp set sender to kp@FreeBSD.org using -f From: Kristof Provost Date: Sun, 26 Apr 2020 16:13:51 +0000 (UTC) To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-stable@freebsd.org, svn-src-stable-12@freebsd.org Subject: svn commit: r360342 - stable/12/sys/netpfil/pf X-SVN-Group: stable-12 X-SVN-Commit-Author: kp X-SVN-Commit-Paths: stable/12/sys/netpfil/pf X-SVN-Commit-Revision: 360342 X-SVN-Commit-Repository: base 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: 2.1.29 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, 26 Apr 2020 16:13:51 -0000 Author: kp Date: Sun Apr 26 16:13:50 2020 New Revision: 360342 URL: https://svnweb.freebsd.org/changeset/base/360342 Log: MFC r360098: pf: Improve ioctl() input validation Both DIOCCHANGEADDR and DIOCADDADDR take a struct pf_pooladdr from userspace. They failed to validate the dyn pointer contained in its struct pf_addr_wrap member structure. This triggered assertion failures under fuzz testing in pfi_dynaddr_setup(). Happily the dyn variable was overruled there, but we should verify that it's set to NULL anyway. Reported-by: syzbot+93e93150bc29f9b4b85f@syzkaller.appspotmail.com Modified: stable/12/sys/netpfil/pf/pf_ioctl.c Directory Properties: stable/12/ (props changed) Modified: stable/12/sys/netpfil/pf/pf_ioctl.c ============================================================================== --- stable/12/sys/netpfil/pf/pf_ioctl.c Sun Apr 26 16:06:09 2020 (r360341) +++ stable/12/sys/netpfil/pf/pf_ioctl.c Sun Apr 26 16:13:50 2020 (r360342) @@ -2643,6 +2643,10 @@ DIOCGETSTATES_full: error = EINVAL; break; } + if (pp->addr.addr.p.dyn != NULL) { + error = EINVAL; + break; + } pa = malloc(sizeof(*pa), M_PFRULE, M_WAITOK); bcopy(&pp->addr, pa, sizeof(struct pf_pooladdr)); if (pa->ifname[0]) @@ -2739,6 +2743,10 @@ DIOCGETSTATES_full: if (pca->addr.addr.type != PF_ADDR_ADDRMASK && pca->addr.addr.type != PF_ADDR_DYNIFTL && pca->addr.addr.type != PF_ADDR_TABLE) { + error = EINVAL; + break; + } + if (pca->addr.addr.p.dyn != NULL) { error = EINVAL; break; }