From patchwork Tue Apr 26 08:21:14 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: "gregkh@linuxfoundation.org" X-Patchwork-Id: 566735 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 vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 00BEEC433F5 for ; Tue, 26 Apr 2022 08:24:08 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1344687AbiDZI1K (ORCPT ); Tue, 26 Apr 2022 04:27:10 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:36180 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1344673AbiDZI0n (ORCPT ); Tue, 26 Apr 2022 04:26:43 -0400 Received: from dfw.source.kernel.org (dfw.source.kernel.org [139.178.84.217]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 559333E5FA; Tue, 26 Apr 2022 01:23:14 -0700 (PDT) Received: from smtp.kernel.org (relay.kernel.org [52.25.139.140]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by dfw.source.kernel.org (Postfix) with ESMTPS id 378C86179E; Tue, 26 Apr 2022 08:23:14 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 15FD1C385B8; Tue, 26 Apr 2022 08:23:12 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1650961393; bh=06XDKZ6eGspf8eNJ01Fmut9oFMZHv1vvkWCZjqwZm/w=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=MOPJVGcvF4RTtXsBmng1LiefEiiEiEwlmyw5fF6yip+ZS9KtJxJtl1p+aC7MT1HJv T7IEkmRrP6amvgbdyAsM1j8XC8WoBwtWB3pHta9bk2mlxoTM7Xt535GeDpysOdjOv9 9bvt7W3sYdBbKUvxYnLrrp96KsWAahsg3+C6MNYU= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Sergey Matyukevich , Vineet Gupta Subject: [PATCH 4.9 20/24] ARC: entry: fix syscall_trace_exit argument Date: Tue, 26 Apr 2022 10:21:14 +0200 Message-Id: <20220426081731.969641568@linuxfoundation.org> X-Mailer: git-send-email 2.36.0 In-Reply-To: <20220426081731.370823950@linuxfoundation.org> References: <20220426081731.370823950@linuxfoundation.org> User-Agent: quilt/0.66 MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: stable@vger.kernel.org From: Sergey Matyukevich commit b1c6ecfdd06907554518ec384ce8e99889d15193 upstream. Function syscall_trace_exit expects pointer to pt_regs. However r0 is also used to keep syscall return value. Restore pointer to pt_regs before calling syscall_trace_exit. Cc: Signed-off-by: Sergey Matyukevich Signed-off-by: Vineet Gupta Signed-off-by: Greg Kroah-Hartman --- arch/arc/kernel/entry.S | 1 + 1 file changed, 1 insertion(+) --- a/arch/arc/kernel/entry.S +++ b/arch/arc/kernel/entry.S @@ -191,6 +191,7 @@ tracesys_exit: st r0, [sp, PT_r0] ; sys call return value in pt_regs ;POST Sys Call Ptrace Hook + mov r0, sp ; pt_regs needed bl @syscall_trace_exit b ret_from_exception ; NOT ret_from_system_call at is saves r0 which ; we'd done before calling post hook above