From owner-svn-src-all@freebsd.org Tue Aug 6 10:29:20 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 71158BEA4D; Tue, 6 Aug 2019 10:29:20 +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 462rTr2G8tz3PYr; Tue, 6 Aug 2019 10:29:20 +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 2B4642A91F; Tue, 6 Aug 2019 10:29:20 +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 x76ATKiR097722; Tue, 6 Aug 2019 10:29:20 GMT (envelope-from tuexen@FreeBSD.org) Received: (from tuexen@localhost) by repo.freebsd.org (8.15.2/8.15.2/Submit) id x76ATK0E097721; Tue, 6 Aug 2019 10:29:20 GMT (envelope-from tuexen@FreeBSD.org) Message-Id: <201908061029.x76ATK0E097721@repo.freebsd.org> X-Authentication-Warning: repo.freebsd.org: tuexen set sender to tuexen@FreeBSD.org using -f From: Michael Tuexen Date: Tue, 6 Aug 2019 10:29:20 +0000 (UTC) To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-head@freebsd.org Subject: svn commit: r350626 - head/sys/netinet X-SVN-Group: head X-SVN-Commit-Author: tuexen X-SVN-Commit-Paths: head/sys/netinet X-SVN-Commit-Revision: 350626 X-SVN-Commit-Repository: base MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit 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: Tue, 06 Aug 2019 10:29:20 -0000 Author: tuexen Date: Tue Aug 6 10:29:19 2019 New Revision: 350626 URL: https://svnweb.freebsd.org/changeset/base/350626 Log: Fix a locking issue in sctp_accept. PR: 238520 Reported by: pho@ MFC after: 1 week Modified: head/sys/netinet/sctp_usrreq.c Modified: head/sys/netinet/sctp_usrreq.c ============================================================================== --- head/sys/netinet/sctp_usrreq.c Tue Aug 6 08:33:21 2019 (r350625) +++ head/sys/netinet/sctp_usrreq.c Tue Aug 6 10:29:19 2019 (r350626) @@ -7226,28 +7226,56 @@ sctp_accept(struct socket *so, struct sockaddr **addr) SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_USRREQ, EINVAL); return (ECONNRESET); } - SCTP_INP_RLOCK(inp); + SCTP_INP_WLOCK(inp); if (inp->sctp_flags & SCTP_PCB_FLAGS_UDPTYPE) { - SCTP_INP_RUNLOCK(inp); + SCTP_INP_WUNLOCK(inp); SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_USRREQ, EOPNOTSUPP); return (EOPNOTSUPP); } if (so->so_state & SS_ISDISCONNECTED) { - SCTP_INP_RUNLOCK(inp); + SCTP_INP_WUNLOCK(inp); SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_USRREQ, ECONNABORTED); return (ECONNABORTED); } stcb = LIST_FIRST(&inp->sctp_asoc_list); if (stcb == NULL) { - SCTP_INP_RUNLOCK(inp); + SCTP_INP_WUNLOCK(inp); SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_USRREQ, EINVAL); return (ECONNRESET); } SCTP_TCB_LOCK(stcb); - SCTP_INP_RUNLOCK(inp); store = stcb->asoc.primary_destination->ro._l_addr; SCTP_CLEAR_SUBSTATE(stcb, SCTP_STATE_IN_ACCEPT_QUEUE); - SCTP_TCB_UNLOCK(stcb); + /* Wake any delayed sleep action */ + if (inp->sctp_flags & SCTP_PCB_FLAGS_DONT_WAKE) { + inp->sctp_flags &= ~SCTP_PCB_FLAGS_DONT_WAKE; + if (inp->sctp_flags & SCTP_PCB_FLAGS_WAKEOUTPUT) { + inp->sctp_flags &= ~SCTP_PCB_FLAGS_WAKEOUTPUT; + SOCKBUF_LOCK(&inp->sctp_socket->so_snd); + if (sowriteable(inp->sctp_socket)) { + sowwakeup_locked(inp->sctp_socket); + } else { + SOCKBUF_UNLOCK(&inp->sctp_socket->so_snd); + } + } + if (inp->sctp_flags & SCTP_PCB_FLAGS_WAKEINPUT) { + inp->sctp_flags &= ~SCTP_PCB_FLAGS_WAKEINPUT; + SOCKBUF_LOCK(&inp->sctp_socket->so_rcv); + if (soreadable(inp->sctp_socket)) { + sctp_defered_wakeup_cnt++; + sorwakeup_locked(inp->sctp_socket); + } else { + SOCKBUF_UNLOCK(&inp->sctp_socket->so_rcv); + } + } + } + SCTP_INP_WUNLOCK(inp); + if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) { + sctp_free_assoc(inp, stcb, SCTP_NORMAL_PROC, + SCTP_FROM_SCTP_USRREQ + SCTP_LOC_19); + } else { + SCTP_TCB_UNLOCK(stcb); + } switch (store.sa.sa_family) { #ifdef INET case AF_INET: @@ -7288,40 +7316,6 @@ sctp_accept(struct socket *so, struct sockaddr **addr) default: /* TSNH */ break; - } - /* Wake any delayed sleep action */ - if (inp->sctp_flags & SCTP_PCB_FLAGS_DONT_WAKE) { - SCTP_INP_WLOCK(inp); - inp->sctp_flags &= ~SCTP_PCB_FLAGS_DONT_WAKE; - if (inp->sctp_flags & SCTP_PCB_FLAGS_WAKEOUTPUT) { - inp->sctp_flags &= ~SCTP_PCB_FLAGS_WAKEOUTPUT; - SCTP_INP_WUNLOCK(inp); - SOCKBUF_LOCK(&inp->sctp_socket->so_snd); - if (sowriteable(inp->sctp_socket)) { - sowwakeup_locked(inp->sctp_socket); - } else { - SOCKBUF_UNLOCK(&inp->sctp_socket->so_snd); - } - SCTP_INP_WLOCK(inp); - } - if (inp->sctp_flags & SCTP_PCB_FLAGS_WAKEINPUT) { - inp->sctp_flags &= ~SCTP_PCB_FLAGS_WAKEINPUT; - SCTP_INP_WUNLOCK(inp); - SOCKBUF_LOCK(&inp->sctp_socket->so_rcv); - if (soreadable(inp->sctp_socket)) { - sctp_defered_wakeup_cnt++; - sorwakeup_locked(inp->sctp_socket); - } else { - SOCKBUF_UNLOCK(&inp->sctp_socket->so_rcv); - } - SCTP_INP_WLOCK(inp); - } - SCTP_INP_WUNLOCK(inp); - } - if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) { - SCTP_TCB_LOCK(stcb); - sctp_free_assoc(inp, stcb, SCTP_NORMAL_PROC, - SCTP_FROM_SCTP_USRREQ + SCTP_LOC_19); } return (0); }