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 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 7708FC433F5 for ; Mon, 4 Oct 2021 22:50:01 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 5185A61507 for ; Mon, 4 Oct 2021 22:50:01 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S236902AbhJDWvu (ORCPT ); Mon, 4 Oct 2021 18:51:50 -0400 Received: from mout.gmx.net ([212.227.15.18]:58485 "EHLO mout.gmx.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S233501AbhJDWvt (ORCPT ); Mon, 4 Oct 2021 18:51:49 -0400 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=gmx.net; s=badeba3b8450; t=1633387798; bh=dGNccr1yjvRidYSXXhFJbz4gHTfWT+FVCZ5xqFFW23k=; h=X-UI-Sender-Class:Date:From:To:Subject; b=LEPjsqlhGDY0MdP0Itx45Ktp6niXPuZZCUHHVLZh/403ALijt1YQhfbMCaJORyLDO VSbtITIYayo5knTFUIPvq78Fb+q2IC0RGT6cTngQfX/jmh7/qKiEQ94MJL+r13YQCr bama55ukvGfnGvzoSF6gPUizzLHH5FTgFXEoxNeo= X-UI-Sender-Class: 01bb95c1-4bf8-414a-932a-4f6e2808ef9c Received: from ls3530 ([92.116.151.97]) by mail.gmx.net (mrgmx004 [212.227.17.190]) with ESMTPSA (Nemesis) id 1MLR1V-1mFAqk3QSh-00IVxc; Tue, 05 Oct 2021 00:49:57 +0200 Date: Tue, 5 Oct 2021 00:49:48 +0200 From: Helge Deller To: linux-parisc@vger.kernel.org, John David Anglin Subject: [PATCH] parisc: Fix ptrace check on syscall return Message-ID: MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline X-Provags-ID: V03:K1:9JLzNYGQWPeuqT+n7ZCc3Lzomcn6+HW7fXFGmkxcXlKMTWm5pg4 fhEUyFkJuPlcPeWsE6TbSutr29I99A9PHwH0sRp8sTt8oTCZId5KEyteDJ3MkWr6Aty71jV 9naHy6uoRa43PIlHn1AtzIQx/eFujg/Ze3e/EhPWhDs52uzDRKRlv0pIWQCbc6dNS724hf9 QY1DkpbtoCflwbst9/lZQ== X-UI-Out-Filterresults: notjunk:1;V03:K0:Mzx0RODuKoU=:TRlJimfZncn74lTlRelCb6 coYP70aqfVH140id/v7JJHET51dEhGlRfEq3YfC5lb5M95+OFv5jBhTrdq6aybjQCOng6UKd0 KkeWS5hTDM5gNZ/3VppV7QmMs+MBOzHw9zCZ9zY6VcLMxCdxvqz5cDolp0fsRLlPycX+jYsZj YvlUykB3Vj+qDpirYlosxGYfYE5PGb3ElWlTOzB8mKrRACebzR464hGtpzn3qaPBa0NxEoGaU 5PRnwem3rflz2WnQnoU/m+H0OHfDC2a+f6lzy15Ng9ep6DYAVX0/emwIzhxhtqSrkmDC5jLt7 dSYgV3qKHuDeei7CFvIVTn3zNXvc4RKtLEmg/4hIcxFlmDj4TgORFhceVDFuTWCZV24pVvzhg x2Nuj8ch1JLtlxJsgK+IXkFnlRaOQdimC2itzPitxBgdr6Q+fzySjCd2hUxLOVV5LebIcMSUe owxCXEaSFqFi9K3ZTDzbVTOYg4J9UIdCJ5yw+evd1jGt87CU4jIsx/RvPsi+LlVUOXqlxVayj vusXOf4KNJ6y+WtBHtRiq6xVPvBAOjBKkkdJkKHn/SG7WXj2cDOKXu5FM7bbyMgljC/pAYZmu Tndhtfu7DP6LczzJJwFFyy+gDrQC4YOSJPj5uAJtYPZ/fy6KpzFWEIrb4av4NdcejQX9gj2f5 lnHXXFbUocxeDy3+xErFk0KzSs84ZPU7uysyE28ISwNwZf9vlOhgG6JYlZcmOMnWrBaJsiaAq TY/DO3fBBboTAv9F1Y2FMEeRHeh6vyrmV5zH2obycn4dkriYSCcq6QptUA0LK4P1Ea8oh6ZE2 SAf4dANcZ0QZPjN4MRMrM26MAM2pSLUZk1xELWS1LrGaFCb1UfnYL4g1TFsiOH+37hKo7Z65x d5u+ltrXPoGL8xfyvjg7a3l7vWnD1HZTjkZWR7J8hYLK2grRUlMmpFIXEnKQk4htKuOtDP9xH z1Q086aeL/W7xKk3ebxboUF58H4CI95FDYTvpFRD68c9iTlvdnS3727XssLwNg5EnDSUeKGSa koDhNrTpbRgs+7aA8xFdsWYrXalVlc9M7pkxVeW1Y3JasJMNwXFWRM/GCFXl1OoMnQ== Content-Transfer-Encoding: quoted-printable Precedence: bulk List-ID: X-Mailing-List: linux-parisc@vger.kernel.org **untested** The TIF_XXX flags are stored in the flags field in the thread_info struct (TI_FLAGS), not in the flags field of the task_struct structure (TASK_FLAGS). It seems this bug has been in the kernel for 12 years (since v2.6.32). Signed-off-by: Helge Deller Fixes: ecd3d4bc06e48 ("parisc: stop using task->ptrace for {single,block}s= tep flags") diff --git a/arch/parisc/kernel/entry.S b/arch/parisc/kernel/entry.S index f75d7d7efd25..c312aef175df 100644 =2D-- a/arch/parisc/kernel/entry.S +++ b/arch/parisc/kernel/entry.S @@ -1834,7 +1834,7 @@ syscall_restore: LDREG TI_TASK-THREAD_SZ_ALGN-FRAME_SIZE(%r30),%r1 /* Are we being ptraced? */ - ldw TASK_FLAGS(%r1),%r19 + LDREG TI_FLAGS-THREAD_SZ_ALGN-FRAME_SIZE(%r30),%r19 ldi _TIF_SYSCALL_TRACE_MASK,%r2 and,COND(=3D) %r19,%r2,%r0 b,n syscall_restore_rfi