From patchwork Tue Feb 5 22:47:16 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Jarkko Sakkinen X-Patchwork-Id: 10798607 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 6542617FB for ; Tue, 5 Feb 2019 22:48:44 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 5848D2BDB7 for ; Tue, 5 Feb 2019 22:48:44 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 4CF992BE36; Tue, 5 Feb 2019 22:48:44 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-6.9 required=2.0 tests=BAYES_00,RCVD_IN_DNSWL_HI autolearn=unavailable version=3.3.1 Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id B2F6F2BDB7 for ; Tue, 5 Feb 2019 22:48:43 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1730829AbfBEWsh (ORCPT ); Tue, 5 Feb 2019 17:48:37 -0500 Received: from mga06.intel.com ([134.134.136.31]:62937 "EHLO mga06.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1729902AbfBEWsg (ORCPT ); Tue, 5 Feb 2019 17:48:36 -0500 X-Amp-Result: SKIPPED(no attachment in message) X-Amp-File-Uploaded: False Received: from orsmga006.jf.intel.com ([10.7.209.51]) by orsmga104.jf.intel.com with ESMTP/TLS/DHE-RSA-AES256-GCM-SHA384; 05 Feb 2019 14:48:36 -0800 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.58,337,1544515200"; d="scan'208";a="113982206" Received: from ibanaga-mobl1.ger.corp.intel.com (HELO localhost) ([10.249.254.171]) by orsmga006.jf.intel.com with ESMTP; 05 Feb 2019 14:48:30 -0800 From: Jarkko Sakkinen To: linux-integrity@vger.kernel.org Cc: linux-kernel@vger.kernel.org, linux-security-module@vger.kernel.org, Peter Huewe , Jason Gunthorpe , Tomas Winkler , Tadeusz Struk , Stefan Berger , Nayna Jain , Jarkko Sakkinen , James Bottomley Subject: [PATCH v11 09/16] tpm: move tpm_validate_commmand() to tpm2-space.c Date: Wed, 6 Feb 2019 00:47:16 +0200 Message-Id: <20190205224723.19671-10-jarkko.sakkinen@linux.intel.com> X-Mailer: git-send-email 2.19.1 In-Reply-To: <20190205224723.19671-1-jarkko.sakkinen@linux.intel.com> References: <20190205224723.19671-1-jarkko.sakkinen@linux.intel.com> MIME-Version: 1.0 Sender: owner-linux-security-module@vger.kernel.org Precedence: bulk List-ID: X-Virus-Scanned: ClamAV using ClamSMTP Move tpm_validate_command() to tpm2-space.c and make it part of the tpm2_prepare_space() flow. Make cc resolution as part of the TPM space functionality in order to detach it from rest of the tpm_transmit() flow. Cc: James Bottomley Signed-off-by: Jarkko Sakkinen Reviewed-by: Stefan Berger Tested-by: Stefan Berger Reviewed-by: Jerry Snitselaar Reviewed-by: James Bottomley --- drivers/char/tpm/tpm-interface.c | 70 +++++++------------------------- drivers/char/tpm/tpm.h | 9 ++-- drivers/char/tpm/tpm2-space.c | 52 +++++++++++++++++++++--- 3 files changed, 67 insertions(+), 64 deletions(-) diff --git a/drivers/char/tpm/tpm-interface.c b/drivers/char/tpm/tpm-interface.c index f5f5224f68b0..669e702540e1 100644 --- a/drivers/char/tpm/tpm-interface.c +++ b/drivers/char/tpm/tpm-interface.c @@ -62,45 +62,6 @@ unsigned long tpm_calc_ordinal_duration(struct tpm_chip *chip, u32 ordinal) } EXPORT_SYMBOL_GPL(tpm_calc_ordinal_duration); -static int tpm_validate_command(struct tpm_chip *chip, struct tpm_space *space, - const void *cmd, size_t len) -{ - const struct tpm_header *header = cmd; - int i; - u32 cc; - u32 attrs; - unsigned int nr_handles; - - if (len < TPM_HEADER_SIZE) - return -EINVAL; - - if (!space) - return 0; - - if (chip->flags & TPM_CHIP_FLAG_TPM2 && chip->nr_commands) { - cc = be32_to_cpu(header->ordinal); - - i = tpm2_find_cc(chip, cc); - if (i < 0) { - dev_dbg(&chip->dev, "0x%04X is an invalid command\n", - cc); - return -EOPNOTSUPP; - } - - attrs = chip->cc_attrs_tbl[i]; - nr_handles = - 4 * ((attrs >> TPM2_CC_ATTR_CHANDLES) & GENMASK(2, 0)); - if (len < TPM_HEADER_SIZE + 4 * nr_handles) - goto err_len; - } - - return 0; -err_len: - dev_dbg(&chip->dev, - "%s: insufficient command length %zu", __func__, len); - return -EINVAL; -} - static int tpm_request_locality(struct tpm_chip *chip, unsigned int flags) { int rc; @@ -168,20 +129,8 @@ static ssize_t tpm_try_transmit(struct tpm_chip *chip, struct tpm_space *space, u32 count, ordinal; unsigned long stop; - rc = tpm_validate_command(chip, space, buf, bufsiz); - if (rc == -EINVAL) - return rc; - /* - * If the command is not implemented by the TPM, synthesize a - * response with a TPM2_RC_COMMAND_CODE return for user-space. - */ - if (rc == -EOPNOTSUPP) { - header->length = cpu_to_be32(sizeof(*header)); - header->tag = cpu_to_be16(TPM2_ST_NO_SESSIONS); - header->return_code = cpu_to_be32(TPM2_RC_COMMAND_CODE | - TSS2_RESMGR_TPM_RC_LAYER); - return sizeof(*header); - } + if (bufsiz < TPM_HEADER_SIZE) + return -EINVAL; if (bufsiz > TPM_BUFSIZE) bufsiz = TPM_BUFSIZE; @@ -196,7 +145,18 @@ static ssize_t tpm_try_transmit(struct tpm_chip *chip, struct tpm_space *space, return -E2BIG; } - rc = tpm2_prepare_space(chip, space, ordinal, buf); + rc = tpm2_prepare_space(chip, space, buf, bufsiz); + /* + * If the command is not implemented by the TPM, synthesize a + * response with a TPM2_RC_COMMAND_CODE return for user-space. + */ + if (rc == -EOPNOTSUPP) { + header->length = cpu_to_be32(sizeof(*header)); + header->tag = cpu_to_be16(TPM2_ST_NO_SESSIONS); + header->return_code = cpu_to_be32(TPM2_RC_COMMAND_CODE | + TSS2_RESMGR_TPM_RC_LAYER); + return sizeof(*header); + } if (rc) return rc; @@ -243,7 +203,7 @@ static ssize_t tpm_try_transmit(struct tpm_chip *chip, struct tpm_space *space, out_rc: if (!rc) - rc = tpm2_commit_space(chip, space, ordinal, buf, &len); + rc = tpm2_commit_space(chip, space, buf, &len); return rc ? rc : len; } diff --git a/drivers/char/tpm/tpm.h b/drivers/char/tpm/tpm.h index 6eb67ccad2a3..e84333259e28 100644 --- a/drivers/char/tpm/tpm.h +++ b/drivers/char/tpm/tpm.h @@ -264,6 +264,7 @@ struct tpm_chip { #endif /* CONFIG_ACPI */ struct tpm_space work_space; + u32 last_cc; u32 nr_commands; u32 *cc_attrs_tbl; @@ -577,10 +578,10 @@ int tpm2_find_cc(struct tpm_chip *chip, u32 cc); int tpm2_init_space(struct tpm_space *space); void tpm2_del_space(struct tpm_chip *chip, struct tpm_space *space); void tpm2_flush_space(struct tpm_chip *chip); -int tpm2_prepare_space(struct tpm_chip *chip, struct tpm_space *space, u32 cc, - u8 *cmd); -int tpm2_commit_space(struct tpm_chip *chip, struct tpm_space *space, - u32 cc, void *buf, size_t *bufsiz); +int tpm2_prepare_space(struct tpm_chip *chip, struct tpm_space *space, u8 *cmd, + size_t cmdsiz); +int tpm2_commit_space(struct tpm_chip *chip, struct tpm_space *space, void *buf, + size_t *bufsiz); int tpm_bios_log_setup(struct tpm_chip *chip); void tpm_bios_log_teardown(struct tpm_chip *chip); diff --git a/drivers/char/tpm/tpm2-space.c b/drivers/char/tpm/tpm2-space.c index 5d6487575074..88f6d0df5c3d 100644 --- a/drivers/char/tpm/tpm2-space.c +++ b/drivers/char/tpm/tpm2-space.c @@ -264,14 +264,55 @@ static int tpm2_map_command(struct tpm_chip *chip, u32 cc, u8 *cmd) return 0; } -int tpm2_prepare_space(struct tpm_chip *chip, struct tpm_space *space, u32 cc, - u8 *cmd) +static int tpm_validate_command(struct tpm_chip *chip, struct tpm_space *space, + const void *cmd, size_t len) +{ + const struct tpm_header *header = (const void *)cmd; + int i; + u32 cc; + u32 attrs; + unsigned int nr_handles; + + if (len < TPM_HEADER_SIZE) + return -EINVAL; + + if (chip->nr_commands) { + cc = be32_to_cpu(header->ordinal); + + i = tpm2_find_cc(chip, cc); + if (i < 0) { + dev_dbg(&chip->dev, "0x%04X is an invalid command\n", + cc); + return -EOPNOTSUPP; + } + + attrs = chip->cc_attrs_tbl[i]; + nr_handles = + 4 * ((attrs >> TPM2_CC_ATTR_CHANDLES) & GENMASK(2, 0)); + if (len < TPM_HEADER_SIZE + 4 * nr_handles) + goto err_len; + } + + return cc; +err_len: + dev_dbg(&chip->dev, "%s: insufficient command length %zu", __func__, + len); + return -EINVAL; +} + +int tpm2_prepare_space(struct tpm_chip *chip, struct tpm_space *space, u8 *cmd, + size_t cmdsiz) { int rc; + int cc; if (!space) return 0; + cc = tpm_validate_command(chip, space, cmd, cmdsiz); + if (cc < 0) + return cc; + memcpy(&chip->work_space.context_tbl, &space->context_tbl, sizeof(space->context_tbl)); memcpy(&chip->work_space.session_tbl, &space->session_tbl, @@ -291,6 +332,7 @@ int tpm2_prepare_space(struct tpm_chip *chip, struct tpm_space *space, u32 cc, return rc; } + chip->last_cc = cc; return 0; } @@ -490,7 +532,7 @@ static int tpm2_save_space(struct tpm_chip *chip) } int tpm2_commit_space(struct tpm_chip *chip, struct tpm_space *space, - u32 cc, void *buf, size_t *bufsiz) + void *buf, size_t *bufsiz) { struct tpm_header *header = buf; int rc; @@ -498,13 +540,13 @@ int tpm2_commit_space(struct tpm_chip *chip, struct tpm_space *space, if (!space) return 0; - rc = tpm2_map_response_header(chip, cc, buf, *bufsiz); + rc = tpm2_map_response_header(chip, chip->last_cc, buf, *bufsiz); if (rc) { tpm2_flush_space(chip); goto out; } - rc = tpm2_map_response_body(chip, cc, buf, *bufsiz); + rc = tpm2_map_response_body(chip, chip->last_cc, buf, *bufsiz); if (rc) { tpm2_flush_space(chip); goto out;