From nobody Wed Sep 17 14:14:16 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 EB7A0C77B75 for ; Mon, 8 May 2023 01:45:18 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S232655AbjEHBpR (ORCPT ); Sun, 7 May 2023 21:45:17 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:48672 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S232580AbjEHBpG (ORCPT ); Sun, 7 May 2023 21:45:06 -0400 Received: from szxga01-in.huawei.com (szxga01-in.huawei.com [45.249.212.187]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id C016911D89 for ; Sun, 7 May 2023 18:44:59 -0700 (PDT) Received: from kwepemm600017.china.huawei.com (unknown [172.30.72.55]) by szxga01-in.huawei.com (SkyGuard) with ESMTP id 4QF3sF2GZSzpTRk; Mon, 8 May 2023 09:40:49 +0800 (CST) Received: from localhost.localdomain (10.175.112.125) by kwepemm600017.china.huawei.com (7.193.23.234) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.1.2507.23; Mon, 8 May 2023 09:44:56 +0800 From: Tong Tiangen To: Catalin Marinas , Mark Rutland , James Morse , Andrew Morton , Thomas Gleixner , Ingo Molnar , Borislav Petkov , Robin Murphy , Dave Hansen , Will Deacon , Alexander Viro , , "H . Peter Anvin" CC: , , , Kefeng Wang , Guohanjun , Xie XiuQi , Tong Tiangen Subject: [PATCH -next v9 3/5] arm64: add uaccess to machine check safe Date: Mon, 8 May 2023 09:44:34 +0800 Message-ID: <20230508014436.198717-4-tongtiangen@huawei.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20230508014436.198717-1-tongtiangen@huawei.com> References: <20230508014436.198717-1-tongtiangen@huawei.com> MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable X-Originating-IP: [10.175.112.125] X-ClientProxiedBy: dggems705-chm.china.huawei.com (10.3.19.182) To kwepemm600017.china.huawei.com (7.193.23.234) X-CFilter-Loop: Reflected Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Type: text/plain; charset="utf-8" If user process access memory fails due to hardware memory error, only the relevant processes are affected, so it is more reasonable to kill the user process and isolate the corrupt page than to panic the kernel. Signed-off-by: Tong Tiangen --- arch/arm64/mm/extable.c | 8 ++++---- 1 file changed, 4 insertions(+), 4 deletions(-) diff --git a/arch/arm64/mm/extable.c b/arch/arm64/mm/extable.c index 478e639f8680..28ec35e3d210 100644 --- a/arch/arm64/mm/extable.c +++ b/arch/arm64/mm/extable.c @@ -85,10 +85,10 @@ bool fixup_exception_mc(struct pt_regs *regs) if (!ex) return false; =20 - /* - * This is not complete, More Machine check safe extable type can - * be processed here. - */ + switch (ex->type) { + case EX_TYPE_UACCESS_ERR_ZERO: + return ex_handler_uaccess_err_zero(ex, regs); + } =20 return false; } --=20 2.25.1