Received: by 2002:a05:6a10:f347:0:0:0:0 with SMTP id d7csp118496pxu; Thu, 3 Dec 2020 21:48:30 -0800 (PST) X-Google-Smtp-Source: ABdhPJwLA73a6h3RkducpMR6tjUaW9JIrqiJhrIiXB5WKwVOvOVGl6ntnXFsm4nkr9jxIqxc6N0V X-Received: by 2002:a05:6402:2059:: with SMTP id bc25mr6054588edb.13.1607060910385; Thu, 03 Dec 2020 21:48:30 -0800 (PST) ARC-Seal: i=1; a=rsa-sha256; t=1607060910; cv=none; d=google.com; s=arc-20160816; b=m29Xw1fAtQrXE3hJjrkuvTn43HthCryBtONqkgdBjUVFevQNwbzV0ngaMgKhuF9ckO v0eCAaEZFPALeoDbgmUDlWC165sqvBouIfygasONFRn/kJ4wB2DtUJ+bWO4eMgPvtTk3 Q4uJWcc+0bSe6JSYENaOnk1nfHp+XGOpFpfrTfqcmdLC15gGvD/n7sW+gFdL7AyKUq25 QeD5cNkryKZzRuooPtJd9zLG6a7wBVfm9XjDNkDlAev4I4rx46D6qVjyOIGl5KhcfF2e MBQZrtt3QHmcy8f782GFhUI/dME1Xxhz0ei6AuSMcJLCuwB5RzTT70PVjAbkfyg+GMyG wkPQ== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=arc-20160816; h=list-id:precedence:mime-version:message-id:date:subject:cc:to:from; bh=IYliU/GxFJ3qBPgHpqVPfVVos3lUpl3IMotTUy9ZNLM=; b=pXGKzVGo9nHql6Rk9o3xOsC9yc4yhxwJ+NnhAH4OFSUFmnQCWMaKJWpcFAc0XvuNYm NHVNScPu8otSvfSpwwQujQR9FOa3knKuCJzK79CFbGGqC0W86E4TXB0H+TfNdSPjF2AD sL6/MP/6yJKHWJUxYZVVJObov2I42/lKJQdDC5KjrEwfNlPI73dMXAYunrfQugbrhj6H YaZL5joj2pxVO9fU2yd7zlOJGKeFxJ4uTo7+GCpqP/AzUyds0I3roJeAD0htHMeHkvAd ZoW/7jpqKn9k6S3jPKNUAjC4Mon7/IrHHTVoZ84p7+0dPYfQc+OzpXwOIe9wtw5teAIt uR6w== ARC-Authentication-Results: i=1; mx.google.com; spf=pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 23.128.96.18 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org Return-Path: Received: from vger.kernel.org (vger.kernel.org. [23.128.96.18]) by mx.google.com with ESMTP id b11si2343554edz.485.2020.12.03.21.48.07; Thu, 03 Dec 2020 21:48:30 -0800 (PST) Received-SPF: pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 23.128.96.18 as permitted sender) client-ip=23.128.96.18; Authentication-Results: mx.google.com; spf=pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 23.128.96.18 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728074AbgLDFo4 (ORCPT + 99 others); Fri, 4 Dec 2020 00:44:56 -0500 Received: from atcsqr.andestech.com ([60.248.187.195]:49651 "EHLO ATCSQR.andestech.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727957AbgLDFoz (ORCPT ); Fri, 4 Dec 2020 00:44:55 -0500 Received: from mail.andestech.com (atcpcs16.andestech.com [10.0.1.222]) by ATCSQR.andestech.com with ESMTP id 0B45hrF7094224; Fri, 4 Dec 2020 13:43:53 +0800 (GMT-8) (envelope-from tesheng@andestech.com) Received: from atcfdc88.andestech.com (10.0.15.120) by ATCPCS16.andestech.com (10.0.1.222) with Microsoft SMTP Server id 14.3.487.0; Fri, 4 Dec 2020 13:43:44 +0800 From: Eric Lin To: , , , , , , , , , CC: Eric Lin Subject: [PATCH v3 0/2] Let illegal access to user-space memory die Date: Fri, 4 Dec 2020 13:42:57 +0800 Message-ID: <20201204054259.32684-1-tesheng@andestech.com> X-Mailer: git-send-email 2.17.0 MIME-Version: 1.0 Content-Type: text/plain X-Originating-IP: [10.0.15.120] X-DNSRBL: X-MAIL: ATCSQR.andestech.com 0B45hrF7094224 Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Accesses to user-space memory without calling uaccess routine leads to hanging in page fault handler. Like arm64, we let it die earlier in page fault handler. Changes in v3: -Let no_context() use die_kernel_fault() helper Changes in v2: -Add a die_kernel_fault() helper -Split one long line code into two Eric Lin (2): riscv/mm: Introduce a die_kernel_fault() helper function riscv/mm: Prevent kernel module to access user memory without uaccess routines arch/riscv/mm/fault.c | 28 ++++++++++++++++++++++------ 1 file changed, 22 insertions(+), 6 deletions(-) -- 2.17.0