From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-6.8 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SIGNED_OFF_BY, SPF_HELO_NONE,SPF_PASS,USER_AGENT_GIT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 6143CC33CB1 for ; Tue, 14 Jan 2020 10:06:07 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 381362467D for ; Tue, 14 Jan 2020 10:06:07 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1578996367; bh=LmySiv9v38Hu478RVBjfEARaYj4GudwdzSzApzt0T2g=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=BJoeKj+FCZOy7lEyXQvjXfFUPXAQ1qIeC+x/cmaqaTiVsh/aD2QE1DwuzUjTsdRNu 0KYWNzziLz3jixoBXkXWHMDCs9mMYxsmBf8H7fu9/V9d7QCZvzmV54w7iife3Q8VzS S5Nn2qFdj/zUCyXcIS5ol1k/qe1NsVE2MexFzewE= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1729880AbgANKGG (ORCPT ); Tue, 14 Jan 2020 05:06:06 -0500 Received: from mail.kernel.org ([198.145.29.99]:34830 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1730291AbgANKGF (ORCPT ); Tue, 14 Jan 2020 05:06:05 -0500 Received: from localhost (83-86-89-107.cable.dynamic.v4.ziggo.nl [83.86.89.107]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id 1F22224680; Tue, 14 Jan 2020 10:06:03 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1578996364; bh=LmySiv9v38Hu478RVBjfEARaYj4GudwdzSzApzt0T2g=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=FQeaCtiRJuc8Fbgc1u+H808++Cr47X2jxy2yylvNdkgR2WkBiXJjL/9Jny3PKxK0e 3HRvX//DEPcH5l714PSMw1P0TglRKH2tcqaQRxFxzsfxyOEyHKWAUwn0Xhd8QCub02 wJ0yLzrxLSvpnHk062F1L5MPAY5c8gRHJlr7sibM= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Amanieu dAntras , Christian Brauner Subject: [PATCH 5.4 63/78] clone3: ensure copy_thread_tls is implemented Date: Tue, 14 Jan 2020 11:01:37 +0100 Message-Id: <20200114094401.878025357@linuxfoundation.org> X-Mailer: git-send-email 2.24.1 In-Reply-To: <20200114094352.428808181@linuxfoundation.org> References: <20200114094352.428808181@linuxfoundation.org> User-Agent: quilt/0.66 MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Sender: stable-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: stable@vger.kernel.org From: Amanieu d'Antras commit dd499f7a7e34270208350a849ef103c0b3ae477f upstream. copy_thread implementations handle CLONE_SETTLS by reading the TLS value from the registers containing the syscall arguments for clone. This doesn't work with clone3 since the TLS value is passed in clone_args instead. Signed-off-by: Amanieu d'Antras Cc: # 5.3.x Link: https://lore.kernel.org/r/20200102172413.654385-8-amanieu@gmail.com Signed-off-by: Christian Brauner Signed-off-by: Greg Kroah-Hartman --- kernel/fork.c | 10 ++++++++++ 1 file changed, 10 insertions(+) --- a/kernel/fork.c +++ b/kernel/fork.c @@ -2513,6 +2513,16 @@ SYSCALL_DEFINE5(clone, unsigned long, cl #endif #ifdef __ARCH_WANT_SYS_CLONE3 + +/* + * copy_thread implementations handle CLONE_SETTLS by reading the TLS value from + * the registers containing the syscall arguments for clone. This doesn't work + * with clone3 since the TLS value is passed in clone_args instead. + */ +#ifndef CONFIG_HAVE_COPY_THREAD_TLS +#error clone3 requires copy_thread_tls support in arch +#endif + noinline static int copy_clone_args_from_user(struct kernel_clone_args *kargs, struct clone_args __user *uargs, size_t usize)