From owner-svn-src-all@freebsd.org Fri Jan 25 15:44:54 2019 Return-Path: Delivered-To: svn-src-all@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 2F5F714B97FF; Fri, 25 Jan 2019 15:44:54 +0000 (UTC) (envelope-from tuexen@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 C941989929; Fri, 25 Jan 2019 15:44:53 +0000 (UTC) (envelope-from tuexen@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 B84F4A3AF; Fri, 25 Jan 2019 15:44:53 +0000 (UTC) (envelope-from tuexen@FreeBSD.org) Received: from repo.freebsd.org ([127.0.1.37]) by repo.freebsd.org (8.15.2/8.15.2) with ESMTP id x0PFir1v052127; Fri, 25 Jan 2019 15:44:53 GMT (envelope-from tuexen@FreeBSD.org) Received: (from tuexen@localhost) by repo.freebsd.org (8.15.2/8.15.2/Submit) id x0PFirlL052126; Fri, 25 Jan 2019 15:44:53 GMT (envelope-from tuexen@FreeBSD.org) Message-Id: <201901251544.x0PFirlL052126@repo.freebsd.org> X-Authentication-Warning: repo.freebsd.org: tuexen set sender to tuexen@FreeBSD.org using -f From: Michael Tuexen Date: Fri, 25 Jan 2019 15:44:53 +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: r343435 - stable/12/sys/netinet X-SVN-Group: stable-12 X-SVN-Commit-Author: tuexen X-SVN-Commit-Paths: stable/12/sys/netinet X-SVN-Commit-Revision: 343435 X-SVN-Commit-Repository: base MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit X-Rspamd-Queue-Id: C941989929 X-Spamd-Bar: -- Authentication-Results: mx1.freebsd.org X-Spamd-Result: default: False [-2.94 / 15.00]; local_wl_from(0.00)[FreeBSD.org]; NEURAL_HAM_MEDIUM(-1.00)[-0.998,0]; NEURAL_HAM_SHORT(-0.94)[-0.941,0]; ASN(0.00)[asn:11403, ipnet:2610:1c1:1::/48, country:US]; NEURAL_HAM_LONG(-1.00)[-0.999,0] 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: Fri, 25 Jan 2019 15:44:54 -0000 Author: tuexen Date: Fri Jan 25 15:44:53 2019 New Revision: 343435 URL: https://svnweb.freebsd.org/changeset/base/343435 Log: MFC r342879: Fix getsockopt() for IP_OPTIONS/IP_RETOPTS. r336616 copies inp->inp_options using the m_dup() function. However, this function expects an mbuf packet header at the beginning, which is not true in this case. Therefore, use m_copym() instead of m_dup(). This issue was found by syzkaller. Reviewed by: mmacy@ Sponsored by: Netflix, Inc. Differential Revision: https://reviews.freebsd.org/D18753 Modified: stable/12/sys/netinet/ip_output.c Directory Properties: stable/12/ (props changed) Modified: stable/12/sys/netinet/ip_output.c ============================================================================== --- stable/12/sys/netinet/ip_output.c Fri Jan 25 15:40:51 2019 (r343434) +++ stable/12/sys/netinet/ip_output.c Fri Jan 25 15:44:53 2019 (r343435) @@ -1262,7 +1262,8 @@ ip_ctloutput(struct socket *so, struct sockopt *sopt) if (inp->inp_options) { struct mbuf *options; - options = m_dup(inp->inp_options, M_NOWAIT); + options = m_copym(inp->inp_options, 0, + M_COPYALL, M_NOWAIT); INP_RUNLOCK(inp); if (options != NULL) { error = sooptcopyout(sopt,