From owner-svn-src-all@freebsd.org Tue Sep 15 19:23:42 2020 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 C4D733DD457; Tue, 15 Sep 2020 19:23:42 +0000 (UTC) (envelope-from markj@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 "Let's Encrypt Authority X3" (verified OK)) by mx1.freebsd.org (Postfix) with ESMTPS id 4BrY724tWqz4X03; Tue, 15 Sep 2020 19:23:42 +0000 (UTC) (envelope-from markj@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 8A93FD421; Tue, 15 Sep 2020 19:23:42 +0000 (UTC) (envelope-from markj@FreeBSD.org) Received: from repo.freebsd.org ([127.0.1.37]) by repo.freebsd.org (8.15.2/8.15.2) with ESMTP id 08FJNg8G059551; Tue, 15 Sep 2020 19:23:42 GMT (envelope-from markj@FreeBSD.org) Received: (from markj@localhost) by repo.freebsd.org (8.15.2/8.15.2/Submit) id 08FJNgdr059550; Tue, 15 Sep 2020 19:23:42 GMT (envelope-from markj@FreeBSD.org) Message-Id: <202009151923.08FJNgdr059550@repo.freebsd.org> X-Authentication-Warning: repo.freebsd.org: markj set sender to markj@FreeBSD.org using -f From: Mark Johnston Date: Tue, 15 Sep 2020 19:23:42 +0000 (UTC) To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-head@freebsd.org Subject: svn commit: r365765 - head/sys/kern X-SVN-Group: head X-SVN-Commit-Author: markj X-SVN-Commit-Paths: head/sys/kern X-SVN-Commit-Revision: 365765 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: 2.1.33 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, 15 Sep 2020 19:23:42 -0000 Author: markj Date: Tue Sep 15 19:23:42 2020 New Revision: 365765 URL: https://svnweb.freebsd.org/changeset/base/365765 Log: Fix locking in uipc_accept(). This function wasn't converted to use the new locking protocol in r333744. Make it use the PCB lock for synchronizing connection state. Tested by: pho Sponsored by: The FreeBSD Foundation Differential Revision: https://reviews.freebsd.org/D26300 Modified: head/sys/kern/uipc_usrreq.c Modified: head/sys/kern/uipc_usrreq.c ============================================================================== --- head/sys/kern/uipc_usrreq.c Tue Sep 15 19:23:22 2020 (r365764) +++ head/sys/kern/uipc_usrreq.c Tue Sep 15 19:23:42 2020 (r365765) @@ -499,18 +499,14 @@ uipc_accept(struct socket *so, struct sockaddr **nam) KASSERT(unp != NULL, ("uipc_accept: unp == NULL")); *nam = malloc(sizeof(struct sockaddr_un), M_SONAME, M_WAITOK); - UNP_LINK_RLOCK(); - unp2 = unp->unp_conn; - if (unp2 != NULL && unp2->unp_addr != NULL) { - UNP_PCB_LOCK(unp2); - sa = (struct sockaddr *) unp2->unp_addr; - bcopy(sa, *nam, sa->sa_len); - UNP_PCB_UNLOCK(unp2); - } else { + UNP_PCB_LOCK(unp); + unp2 = unp_pcb_lock_peer(unp); + if (unp2 != NULL && unp2->unp_addr != NULL) + sa = (struct sockaddr *)unp2->unp_addr; + else sa = &sun_noname; - bcopy(sa, *nam, sa->sa_len); - } - UNP_LINK_RUNLOCK(); + bcopy(sa, *nam, sa->sa_len); + unp_pcb_unlock_pair(unp, unp2); return (0); }