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 X-Spam-Level: X-Spam-Status: No, score=-11.0 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI, MENTIONS_GIT_HOSTING,SIGNED_OFF_BY,SPF_PASS,URIBL_BLOCKED,USER_AGENT_GIT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 0D8F5C282C7 for ; Tue, 29 Jan 2019 11:50:26 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id D41692148E for ; Tue, 29 Jan 2019 11:50:25 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1548762625; bh=TzCzUJe7TFytn0tpctgYTBfj/ij6KowV4zAfZ2DgC5k=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=PJSX2cdn8rogPMVqD83qVaYYBn2Sn87v55T7JD17X6Bgh7FdlU+Af/bFyyHo8Etrd fefM1O9Zg0ApjwHVN2AuJf8HEV9xO0hjGjw4diEO5QiHfmSB4jO8f/KPWqd6jlHsiR nA+5nmxoSBnTDHZjn8uvlt8bfKlptyrNbC7VnnEk= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1731676AbfA2LuX (ORCPT ); Tue, 29 Jan 2019 06:50:23 -0500 Received: from mail.kernel.org ([198.145.29.99]:41656 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1731657AbfA2LuW (ORCPT ); Tue, 29 Jan 2019 06:50:22 -0500 Received: from localhost (5356596B.cm-6-7b.dynamic.ziggo.nl [83.86.89.107]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id 87EBE2148E; Tue, 29 Jan 2019 11:50:20 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1548762621; bh=TzCzUJe7TFytn0tpctgYTBfj/ij6KowV4zAfZ2DgC5k=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=aMgv8AEMvke/D11nRsS62inaU9dqyieNk57DoQWmQ4PuofQWTrcuD5y6SyANQ/U+T CFk+Ld/HWrDjogBGHBhkOJ6n/6ZKqL5lPA33aIB5hsyQXOuXCzherEVW7OQfWHuM9I w3GuQC5XhSZYbAOenqf0JKpTBunhwozIHRdHDc7s= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Sujith Pandel , Vishal Verma , Jeff Moyer , Dan Williams Subject: [PATCH 4.14 38/68] acpi/nfit: Fix command-supported detection Date: Tue, 29 Jan 2019 12:36:00 +0100 Message-Id: <20190129113134.858481512@linuxfoundation.org> X-Mailer: git-send-email 2.20.1 In-Reply-To: <20190129113131.751891514@linuxfoundation.org> References: <20190129113131.751891514@linuxfoundation.org> User-Agent: quilt/0.65 X-stable: review X-Patchwork-Hint: ignore MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org 4.14-stable review patch. If anyone has any objections, please let me know. ------------------ From: Dan Williams commit 11189c1089da413aa4b5fd6be4c4d47c78968819 upstream. The _DSM function number validation only happens to succeed when the generic Linux command number translation corresponds with a DSM-family-specific function number. This breaks NVDIMM-N implementations that correctly implement _LSR, _LSW, and _LSI, but do not happen to publish support for DSM function numbers 4, 5, and 6. Recall that the support for _LS{I,R,W} family of methods results in the DIMM being marked as supporting those command numbers at acpi_nfit_register_dimms() time. The DSM function mask is only used for ND_CMD_CALL support of non-NVDIMM_FAMILY_INTEL devices. Fixes: 31eca76ba2fc ("nfit, libnvdimm: limited/whitelisted dimm command...") Cc: Link: https://github.com/pmem/ndctl/issues/78 Reported-by: Sujith Pandel Tested-by: Sujith Pandel Reviewed-by: Vishal Verma Reviewed-by: Jeff Moyer Signed-off-by: Dan Williams Signed-off-by: Greg Kroah-Hartman --- drivers/acpi/nfit/core.c | 54 ++++++++++++++++++++++++++++++++++------------- 1 file changed, 40 insertions(+), 14 deletions(-) --- a/drivers/acpi/nfit/core.c +++ b/drivers/acpi/nfit/core.c @@ -208,6 +208,32 @@ static int xlat_status(struct nvdimm *nv return xlat_nvdimm_status(buf, cmd, status); } +static int cmd_to_func(struct nfit_mem *nfit_mem, unsigned int cmd, + struct nd_cmd_pkg *call_pkg) +{ + if (call_pkg) { + int i; + + if (nfit_mem->family != call_pkg->nd_family) + return -ENOTTY; + + for (i = 0; i < ARRAY_SIZE(call_pkg->nd_reserved2); i++) + if (call_pkg->nd_reserved2[i]) + return -EINVAL; + return call_pkg->nd_command; + } + + /* Linux ND commands == NVDIMM_FAMILY_INTEL function numbers */ + if (nfit_mem->family == NVDIMM_FAMILY_INTEL) + return cmd; + + /* + * Force function number validation to fail since 0 is never + * published as a valid function in dsm_mask. + */ + return 0; +} + int acpi_nfit_ctl(struct nvdimm_bus_descriptor *nd_desc, struct nvdimm *nvdimm, unsigned int cmd, void *buf, unsigned int buf_len, int *cmd_rc) { @@ -220,21 +246,11 @@ int acpi_nfit_ctl(struct nvdimm_bus_desc unsigned long cmd_mask, dsm_mask; u32 offset, fw_status = 0; acpi_handle handle; - unsigned int func; const guid_t *guid; - int rc, i; + int func, rc, i; if (cmd_rc) *cmd_rc = -EINVAL; - func = cmd; - if (cmd == ND_CMD_CALL) { - call_pkg = buf; - func = call_pkg->nd_command; - - for (i = 0; i < ARRAY_SIZE(call_pkg->nd_reserved2); i++) - if (call_pkg->nd_reserved2[i]) - return -EINVAL; - } if (nvdimm) { struct nfit_mem *nfit_mem = nvdimm_provider_data(nvdimm); @@ -242,9 +258,12 @@ int acpi_nfit_ctl(struct nvdimm_bus_desc if (!adev) return -ENOTTY; - if (call_pkg && nfit_mem->family != call_pkg->nd_family) - return -ENOTTY; + if (cmd == ND_CMD_CALL) + call_pkg = buf; + func = cmd_to_func(nfit_mem, cmd, call_pkg); + if (func < 0) + return func; dimm_name = nvdimm_name(nvdimm); cmd_name = nvdimm_cmd_name(cmd); cmd_mask = nvdimm_cmd_mask(nvdimm); @@ -255,6 +274,7 @@ int acpi_nfit_ctl(struct nvdimm_bus_desc } else { struct acpi_device *adev = to_acpi_dev(acpi_desc); + func = cmd; cmd_name = nvdimm_bus_cmd_name(cmd); cmd_mask = nd_desc->cmd_mask; dsm_mask = cmd_mask; @@ -269,7 +289,13 @@ int acpi_nfit_ctl(struct nvdimm_bus_desc if (!desc || (cmd && (desc->out_num + desc->in_num == 0))) return -ENOTTY; - if (!test_bit(cmd, &cmd_mask) || !test_bit(func, &dsm_mask)) + /* + * Check for a valid command. For ND_CMD_CALL, we also have to + * make sure that the DSM function is supported. + */ + if (cmd == ND_CMD_CALL && !test_bit(func, &dsm_mask)) + return -ENOTTY; + else if (!test_bit(cmd, &cmd_mask)) return -ENOTTY; in_obj.type = ACPI_TYPE_PACKAGE;