From owner-dev-commits-src-all@freebsd.org Wed Jun 16 14:02:31 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 A00A666361D; Wed, 16 Jun 2021 14:02:31 +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 4G4n1z3zgCz3th0; Wed, 16 Jun 2021 14:02:31 +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 717591D0B6; Wed, 16 Jun 2021 14:02:31 +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 15GE2Vtk021796; Wed, 16 Jun 2021 14:02:31 GMT (envelope-from git@gitrepo.freebsd.org) Received: (from git@localhost) by gitrepo.freebsd.org (8.16.1/8.16.1/Submit) id 15GE2V6w021795; Wed, 16 Jun 2021 14:02:31 GMT (envelope-from git) Date: Wed, 16 Jun 2021 14:02:31 GMT Message-Id: <202106161402.15GE2V6w021795@gitrepo.freebsd.org> To: src-committers@FreeBSD.org, dev-commits-src-all@FreeBSD.org, dev-commits-src-main@FreeBSD.org From: Mark Johnston Subject: git: bc6a2267fffe - main - ipfw: Update the pfil mbuf pointer in ipfw_check_frame() MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: 8bit X-Git-Committer: markj X-Git-Repository: src X-Git-Refname: refs/heads/main X-Git-Reftype: branch X-Git-Commit: bc6a2267fffeafd3946637607a74cfd639398f9d 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: Wed, 16 Jun 2021 14:02:31 -0000 The branch main has been updated by markj: URL: https://cgit.FreeBSD.org/src/commit/?id=bc6a2267fffeafd3946637607a74cfd639398f9d commit bc6a2267fffeafd3946637607a74cfd639398f9d Author: Mark Johnston AuthorDate: 2021-06-16 13:46:56 +0000 Commit: Mark Johnston CommitDate: 2021-06-16 13:46:56 +0000 ipfw: Update the pfil mbuf pointer in ipfw_check_frame() ipfw_chk() might call m_pullup() and thus can change the mbuf chain head. In this case, the new chain head has to be returned to the pfil hook caller, otherwise the pfil hook caller is left with a dangling pointer. Note that this affects only the link-layer hooks installed when the net.link.ether.ipfw sysctl is set to 1. PR: 256439, 254015, 255069, 255104 Fixes: f355cb3e6 Reviewed by: ae MFC after: 3 days Sponsored by: The FreeBSD Foundation Differential Revision: https://reviews.freebsd.org/D30764 --- sys/netpfil/ipfw/ip_fw_pfil.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/sys/netpfil/ipfw/ip_fw_pfil.c b/sys/netpfil/ipfw/ip_fw_pfil.c index e21831c80ec6..01a44df47180 100644 --- a/sys/netpfil/ipfw/ip_fw_pfil.c +++ b/sys/netpfil/ipfw/ip_fw_pfil.c @@ -371,6 +371,8 @@ again: } ipfw = ipfw_chk(&args); + if (!mem) + *p.m = args.m; ret = PFIL_PASS; switch (ipfw) {