From owner-svn-src-all@freebsd.org Mon Jul 22 19:25:07 2019 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 4CEF1B9CB6; Mon, 22 Jul 2019 19:25:07 +0000 (UTC) (envelope-from kib@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 F39A586F15; Mon, 22 Jul 2019 19:25:06 +0000 (UTC) (envelope-from kib@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 7E90819EBA; Mon, 22 Jul 2019 19:25:06 +0000 (UTC) (envelope-from kib@FreeBSD.org) Received: from repo.freebsd.org ([127.0.1.37]) by repo.freebsd.org (8.15.2/8.15.2) with ESMTP id x6MJP6k4093412; Mon, 22 Jul 2019 19:25:06 GMT (envelope-from kib@FreeBSD.org) Received: (from kib@localhost) by repo.freebsd.org (8.15.2/8.15.2/Submit) id x6MJP6AR093411; Mon, 22 Jul 2019 19:25:06 GMT (envelope-from kib@FreeBSD.org) Message-Id: <201907221925.x6MJP6AR093411@repo.freebsd.org> X-Authentication-Warning: repo.freebsd.org: kib set sender to kib@FreeBSD.org using -f From: Konstantin Belousov Date: Mon, 22 Jul 2019 19:25:06 +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: r350222 - stable/12/sys/kern X-SVN-Group: stable-12 X-SVN-Commit-Author: kib X-SVN-Commit-Paths: stable/12/sys/kern X-SVN-Commit-Revision: 350222 X-SVN-Commit-Repository: base MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit X-Rspamd-Queue-Id: F39A586F15 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)[-1.000,0]; NEURAL_HAM_LONG(-1.00)[-1.000,0]; NEURAL_HAM_SHORT(-0.94)[-0.941,0]; ASN(0.00)[asn:11403, ipnet:2610:1c1:1::/48, country:US] 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: Mon, 22 Jul 2019 19:25:07 -0000 Author: kib Date: Mon Jul 22 19:25:05 2019 New Revision: 350222 URL: https://svnweb.freebsd.org/changeset/base/350222 Log: MFC r350156: Fix leak of memory and file refs with sendmsg(2) over unix domain sockets. Approved by: so (insta-MFC) Modified: stable/12/sys/kern/uipc_usrreq.c Directory Properties: stable/12/ (props changed) Modified: stable/12/sys/kern/uipc_usrreq.c ============================================================================== --- stable/12/sys/kern/uipc_usrreq.c Mon Jul 22 18:54:26 2019 (r350221) +++ stable/12/sys/kern/uipc_usrreq.c Mon Jul 22 19:25:05 2019 (r350222) @@ -2120,30 +2120,53 @@ unp_init(void) UNP_DEFERRED_LOCK_INIT(); } +static void +unp_internalize_cleanup_rights(struct mbuf *control) +{ + struct cmsghdr *cp; + struct mbuf *m; + void *data; + socklen_t datalen; + + for (m = control; m != NULL; m = m->m_next) { + cp = mtod(m, struct cmsghdr *); + if (cp->cmsg_level != SOL_SOCKET || + cp->cmsg_type != SCM_RIGHTS) + continue; + data = CMSG_DATA(cp); + datalen = (caddr_t)cp + cp->cmsg_len - (caddr_t)data; + unp_freerights(data, datalen / sizeof(struct filedesc *)); + } +} + static int unp_internalize(struct mbuf **controlp, struct thread *td) { - struct mbuf *control = *controlp; - struct proc *p = td->td_proc; - struct filedesc *fdesc = p->p_fd; + struct mbuf *control, **initial_controlp; + struct proc *p; + struct filedesc *fdesc; struct bintime *bt; - struct cmsghdr *cm = mtod(control, struct cmsghdr *); + struct cmsghdr *cm; struct cmsgcred *cmcred; struct filedescent *fde, **fdep, *fdev; struct file *fp; struct timeval *tv; struct timespec *ts; - int i, *fdp; void *data; - socklen_t clen = control->m_len, datalen; - int error, oldfds; + socklen_t clen, datalen; + int i, error, *fdp, oldfds; u_int newlen; UNP_LINK_UNLOCK_ASSERT(); + p = td->td_proc; + fdesc = p->p_fd; error = 0; + control = *controlp; + clen = control->m_len; *controlp = NULL; - while (cm != NULL) { + initial_controlp = controlp; + for (cm = mtod(control, struct cmsghdr *); cm != NULL;) { if (sizeof(*cm) > clen || cm->cmsg_level != SOL_SOCKET || cm->cmsg_len > clen || cm->cmsg_len < sizeof(*cm)) { error = EINVAL; @@ -2294,6 +2317,8 @@ unp_internalize(struct mbuf **controlp, struct thread } out: + if (error != 0 && initial_controlp != NULL) + unp_internalize_cleanup_rights(*initial_controlp); m_freem(control); return (error); }