From owner-svn-src-all@freebsd.org Mon Aug 17 21:30:49 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 CBFC43BCD4C; Mon, 17 Aug 2020 21:30:49 +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 4BVnK5557Dz4JRM; Mon, 17 Aug 2020 21:30:49 +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 928D426F3B; Mon, 17 Aug 2020 21:30:49 +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 07HLUnKt076923; Mon, 17 Aug 2020 21:30:49 GMT (envelope-from markj@FreeBSD.org) Received: (from markj@localhost) by repo.freebsd.org (8.15.2/8.15.2/Submit) id 07HLUnmI076922; Mon, 17 Aug 2020 21:30:49 GMT (envelope-from markj@FreeBSD.org) Message-Id: <202008172130.07HLUnmI076922@repo.freebsd.org> X-Authentication-Warning: repo.freebsd.org: markj set sender to markj@FreeBSD.org using -f From: Mark Johnston Date: Mon, 17 Aug 2020 21:30:49 +0000 (UTC) To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-head@freebsd.org Subject: svn commit: r364329 - head/sys/compat/linux X-SVN-Group: head X-SVN-Commit-Author: markj X-SVN-Commit-Paths: head/sys/compat/linux X-SVN-Commit-Revision: 364329 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: Mon, 17 Aug 2020 21:30:49 -0000 Author: markj Date: Mon Aug 17 21:30:49 2020 New Revision: 364329 URL: https://svnweb.freebsd.org/changeset/base/364329 Log: Remove "emulation" of clone(CLONE_PARENT | CLONE_THREAD). On Linux this is supposed to result in EINVAL. Reported by: syzkaller MFC after: 1 week Sponsored by: The FreeBSD Foundation Modified: head/sys/compat/linux/linux_fork.c Modified: head/sys/compat/linux/linux_fork.c ============================================================================== --- head/sys/compat/linux/linux_fork.c Mon Aug 17 21:30:15 2020 (r364328) +++ head/sys/compat/linux/linux_fork.c Mon Aug 17 21:30:49 2020 (r364329) @@ -244,6 +244,8 @@ linux_clone_thread(struct thread *td, struct linux_clo td->td_tid, (unsigned)args->flags, args->parent_tidptr, args->child_tidptr); + if ((args->flags & LINUX_CLONE_PARENT) != 0) + return (EINVAL); if (args->flags & LINUX_CLONE_PARENT_SETTID) if (args->parent_tidptr == NULL) return (EINVAL); @@ -304,12 +306,8 @@ linux_clone_thread(struct thread *td, struct linux_clo PROC_LOCK(p); p->p_flag |= P_HADTHREADS; + thread_link(newtd, p); bcopy(p->p_comm, newtd->td_name, sizeof(newtd->td_name)); - - if (args->flags & LINUX_CLONE_PARENT) - thread_link(newtd, p->p_pptr); - else - thread_link(newtd, p); thread_lock(td); /* let the scheduler know about these things. */