From owner-dev-commits-src-all@freebsd.org Fri Aug 6 10:00:53 2021 Return-Path: Delivered-To: dev-commits-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 D0082652BCB; Fri, 6 Aug 2021 10:00:53 +0000 (UTC) (envelope-from git@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) key-exchange X25519 server-signature RSA-PSS (4096 bits) server-digest SHA256 client-signature RSA-PSS (4096 bits) client-digest SHA256) (Client CN "mxrelay.nyi.freebsd.org", Issuer "R3" (verified OK)) by mx1.freebsd.org (Postfix) with ESMTPS id 4Gh1Fd5b5Xz3sq2; Fri, 6 Aug 2021 10:00:53 +0000 (UTC) (envelope-from git@FreeBSD.org) Received: from gitrepo.freebsd.org (gitrepo.freebsd.org [IPv6:2610:1c1:1:6068::e6a:5]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (4096 bits) server-digest SHA256) (Client did not present a certificate) by mxrelay.nyi.freebsd.org (Postfix) with ESMTPS id A7E7B3464; Fri, 6 Aug 2021 10:00:53 +0000 (UTC) (envelope-from git@FreeBSD.org) Received: from gitrepo.freebsd.org ([127.0.1.44]) by gitrepo.freebsd.org (8.16.1/8.16.1) with ESMTP id 176A0raH085618; Fri, 6 Aug 2021 10:00:53 GMT (envelope-from git@gitrepo.freebsd.org) Received: (from git@localhost) by gitrepo.freebsd.org (8.16.1/8.16.1/Submit) id 176A0r7R085617; Fri, 6 Aug 2021 10:00:53 GMT (envelope-from git) Date: Fri, 6 Aug 2021 10:00:53 GMT Message-Id: <202108061000.176A0r7R085617@gitrepo.freebsd.org> To: src-committers@FreeBSD.org, dev-commits-src-all@FreeBSD.org, dev-commits-src-main@FreeBSD.org From: "Andrey V. Elsukov" Subject: git: d477a7feed17 - main - Fix panic in IPv6 multicast code. MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: 8bit X-Git-Committer: ae X-Git-Repository: src X-Git-Refname: refs/heads/main X-Git-Reftype: branch X-Git-Commit: d477a7feed177d0ad5c12bc6e2cce804d427ed38 Auto-Submitted: auto-generated X-BeenThere: dev-commits-src-all@freebsd.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: Commit messages for all branches of the src repository List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Fri, 06 Aug 2021 10:00:53 -0000 The branch main has been updated by ae: URL: https://cgit.FreeBSD.org/src/commit/?id=d477a7feed177d0ad5c12bc6e2cce804d427ed38 commit d477a7feed177d0ad5c12bc6e2cce804d427ed38 Author: Andrey V. Elsukov AuthorDate: 2021-08-05 08:51:46 +0000 Commit: Andrey V. Elsukov CommitDate: 2021-08-06 09:57:59 +0000 Fix panic in IPv6 multicast code. Add check that ifp supports IPv6 multicasts in in6_getmulti. This fixes panic when user application tries to join into multicast group on an interface that doesn't support IPv6 multicasts, like IFT_PFLOG interfaces. PR: 257302 Reviewed by: melifaro MFC after: 1 week Differential Revision: https://reviews.freebsd.org/D31420 --- sys/netinet6/in6_mcast.c | 11 ++++++++++- 1 file changed, 10 insertions(+), 1 deletion(-) diff --git a/sys/netinet6/in6_mcast.c b/sys/netinet6/in6_mcast.c index 0744a1178fc7..7326befc6d01 100644 --- a/sys/netinet6/in6_mcast.c +++ b/sys/netinet6/in6_mcast.c @@ -374,9 +374,18 @@ in6_getmulti(struct ifnet *ifp, const struct in6_addr *group, IN6_MULTI_LIST_LOCK(); IF_ADDR_WLOCK(ifp); NET_EPOCH_ENTER(et); - inm = in6m_lookup_locked(ifp, group); + /* + * Does ifp support IPv6 multicasts? + */ + if (ifp->if_afdata[AF_INET6] == NULL) + error = ENODEV; + else + inm = in6m_lookup_locked(ifp, group); NET_EPOCH_EXIT(et); + if (error != 0) + goto out_locked; + if (inm != NULL) { /* * If we already joined this group, just bump the