From owner-svn-src-head@freebsd.org Sat Dec 1 09:58:22 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 F255C132A662; Sat, 1 Dec 2018 09:58:21 +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 TLSv1.2 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 985BC7A0CA; Sat, 1 Dec 2018 09:58:21 +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 796CB1644F; Sat, 1 Dec 2018 09:58:21 +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 wB19wLID032271; Sat, 1 Dec 2018 09:58:21 GMT (envelope-from kp@FreeBSD.org) Received: (from kp@localhost) by repo.freebsd.org (8.15.2/8.15.2/Submit) id wB19wLeK032270; Sat, 1 Dec 2018 09:58:21 GMT (envelope-from kp@FreeBSD.org) Message-Id: <201812010958.wB19wLeK032270@repo.freebsd.org> X-Authentication-Warning: repo.freebsd.org: kp set sender to kp@FreeBSD.org using -f From: Kristof Provost Date: Sat, 1 Dec 2018 09:58:21 +0000 (UTC) To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-head@freebsd.org Subject: svn commit: r341359 - head/sys/netpfil/pf X-SVN-Group: head X-SVN-Commit-Author: kp X-SVN-Commit-Paths: head/sys/netpfil/pf X-SVN-Commit-Revision: 341359 X-SVN-Commit-Repository: base MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit X-Rspamd-Queue-Id: 985BC7A0CA X-Spamd-Result: default: False [0.05 / 15.00]; local_wl_from(0.00)[FreeBSD.org]; NEURAL_HAM_SHORT(-0.35)[-0.348,0]; NEURAL_SPAM_LONG(0.31)[0.307,0]; NEURAL_SPAM_MEDIUM(0.10)[0.096,0]; ASN(0.00)[asn:11403, ipnet:2610:1c1:1::/48, country:US] X-Rspamd-Server: mx1.freebsd.org 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: Sat, 01 Dec 2018 09:58:22 -0000 Author: kp Date: Sat Dec 1 09:58:21 2018 New Revision: 341359 URL: https://svnweb.freebsd.org/changeset/base/341359 Log: pf: Fix panic on overlapping interface names In rare situations[*] it's possible for two different interfaces to have the same name. This confuses pf, because kifs are indexed by name (which is assumed to be unique). As a result we can end up trying to if_rele(NULL), which panics. Explicitly checking the ifp pointer before if_rele() prevents the panic. Note pf will likely behave in unexpected ways on the the overlapping interfaces. [*] Insert an interface in a vnet jail. Rename it to an interface which exists on the host. Remove the jail. There are now two interfaces with the same name in the host. Modified: head/sys/netpfil/pf/pf_if.c Modified: head/sys/netpfil/pf/pf_if.c ============================================================================== --- head/sys/netpfil/pf/pf_if.c Sat Dec 1 09:57:29 2018 (r341358) +++ head/sys/netpfil/pf/pf_if.c Sat Dec 1 09:58:21 2018 (r341359) @@ -853,7 +853,8 @@ pfi_detach_ifnet_event(void *arg __unused, struct ifne V_pfi_update++; pfi_kif_update(kif); - if_rele(kif->pfik_ifp); + if (kif->pfik_ifp) + if_rele(kif->pfik_ifp); kif->pfik_ifp = NULL; ifp->if_pf_kif = NULL;