From nobody Fri Dec 19 22:00:59 2025 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 9C226C49EC0 for ; Tue, 23 Aug 2022 10:17:21 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1353918AbiHWKQS (ORCPT ); Tue, 23 Aug 2022 06:16:18 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:57576 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1352937AbiHWKGa (ORCPT ); Tue, 23 Aug 2022 06:06:30 -0400 Received: from dfw.source.kernel.org (dfw.source.kernel.org [IPv6:2604:1380:4641:c500::1]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 2A0D11181C; Tue, 23 Aug 2022 01:53:42 -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 94721611DD; Tue, 23 Aug 2022 08:53:41 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 904CEC433D6; Tue, 23 Aug 2022 08:53:40 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1661244821; bh=FiKJFq3p3hNMNAz/G+j1Jr63XmO/Uxj1ECLA2jSv+YM=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=IwbrROQBIx4qKcDS5FKwYjMOaBy6G8q7o0yJWS+9+mZi1A7u1TSS0g4HO/8dzV5L9 RTDU6cKwy9dZTyuHDw3PI3QRudDD2y8b1edSmY9WPLI4gPa1r7ulFWW7JjAFFQhIOM +KAUFU6q9rWvTTgKDyW9WWZ7wEvyiY/jDRgdpJXg= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Al Viro , Dinh Nguyen Subject: [PATCH 4.14 197/229] nios2: page fault et.al. are *not* restartable syscalls... Date: Tue, 23 Aug 2022 10:25:58 +0200 Message-Id: <20220823080100.683561191@linuxfoundation.org> X-Mailer: git-send-email 2.37.2 In-Reply-To: <20220823080053.202747790@linuxfoundation.org> References: <20220823080053.202747790@linuxfoundation.org> User-Agent: quilt/0.67 MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Type: text/plain; charset="utf-8" From: Al Viro commit 8535c239ac674f7ead0f2652932d35c52c4123b2 upstream. make sure that ->orig_r2 is negative for everything except the syscalls. Fixes: 82ed08dd1b0e ("nios2: Exception handling") Signed-off-by: Al Viro Signed-off-by: Dinh Nguyen Signed-off-by: Greg Kroah-Hartman --- arch/nios2/include/asm/entry.h | 3 ++- arch/nios2/kernel/entry.S | 4 +--- 2 files changed, 3 insertions(+), 4 deletions(-) --- a/arch/nios2/include/asm/entry.h +++ b/arch/nios2/include/asm/entry.h @@ -50,7 +50,8 @@ stw r13, PT_R13(sp) stw r14, PT_R14(sp) stw r15, PT_R15(sp) - stw r2, PT_ORIG_R2(sp) + movi r24, -1 + stw r24, PT_ORIG_R2(sp) stw r7, PT_ORIG_R7(sp) =20 stw ra, PT_RA(sp) --- a/arch/nios2/kernel/entry.S +++ b/arch/nios2/kernel/entry.S @@ -185,6 +185,7 @@ ENTRY(handle_system_call) ldw r5, PT_R5(sp) =20 local_restart: + stw r2, PT_ORIG_R2(sp) /* Check that the requested system call is within limits */ movui r1, __NR_syscalls bgeu r2, r1, ret_invsyscall @@ -336,9 +337,6 @@ external_interrupt: /* skip if no interrupt is pending */ beq r12, r0, ret_from_interrupt =20 - movi r24, -1 - stw r24, PT_ORIG_R2(sp) - /* * Process an external hardware interrupt. */