From patchwork Thu Oct 3 11:24:24 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Jarkko Sakkinen X-Patchwork-Id: 11172539 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id D2A4313B1 for ; Thu, 3 Oct 2019 11:24:43 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id BB02520830 for ; Thu, 3 Oct 2019 11:24:43 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1729812AbfJCLYk (ORCPT ); Thu, 3 Oct 2019 07:24:40 -0400 Received: from mga11.intel.com ([192.55.52.93]:48533 "EHLO mga11.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1729741AbfJCLYj (ORCPT ); Thu, 3 Oct 2019 07:24:39 -0400 X-Amp-Result: SKIPPED(no attachment in message) X-Amp-File-Uploaded: False Received: from fmsmga003.fm.intel.com ([10.253.24.29]) by fmsmga102.fm.intel.com with ESMTP/TLS/DHE-RSA-AES256-GCM-SHA384; 03 Oct 2019 04:24:39 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.67,251,1566889200"; d="scan'208";a="198502940" Received: from jsakkine-mobl1.tm.intel.com (HELO localhost) ([10.237.50.161]) by FMSMGA003.fm.intel.com with ESMTP; 03 Oct 2019 04:24:36 -0700 From: Jarkko Sakkinen To: linux-stable@vger.kernel.org Cc: Vadim Sukhomlinov , stable@vger.kernel.org, Douglas Anderson , Jarkko Sakkinen , Peter Huewe , Jason Gunthorpe , Arnd Bergmann , Greg Kroah-Hartman , linux-integrity@vger.kernel.org (open list:TPM DEVICE DRIVER), linux-kernel@vger.kernel.org (open list) Subject: [PATCH 3/3] tpm: Fix TPM 1.2 Shutdown sequence to prevent future TPM operations Date: Thu, 3 Oct 2019 14:24:24 +0300 Message-Id: <20191003112424.9036-4-jarkko.sakkinen@linux.intel.com> X-Mailer: git-send-email 2.20.1 In-Reply-To: <20191003112424.9036-1-jarkko.sakkinen@linux.intel.com> References: <20191003112424.9036-1-jarkko.sakkinen@linux.intel.com> MIME-Version: 1.0 Sender: linux-integrity-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-integrity@vger.kernel.org From: Vadim Sukhomlinov commit db4d8cb9c9f2af71c4d087817160d866ed572cc9 upstream TPM 2.0 Shutdown involve sending TPM2_Shutdown to TPM chip and disabling future TPM operations. TPM 1.2 behavior was different, future TPM operations weren't disabled, causing rare issues. This patch ensures that future TPM operations are disabled. Fixes: d1bd4a792d39 ("tpm: Issue a TPM2_Shutdown for TPM2 devices.") Cc: stable@vger.kernel.org Signed-off-by: Vadim Sukhomlinov [dianders: resolved merge conflicts with mainline] Signed-off-by: Douglas Anderson Reviewed-by: Jarkko Sakkinen Signed-off-by: Jarkko Sakkinen --- drivers/char/tpm/tpm-chip.c | 5 +++-- 1 file changed, 3 insertions(+), 2 deletions(-) diff --git a/drivers/char/tpm/tpm-chip.c b/drivers/char/tpm/tpm-chip.c index 0eca20c5a80c..dcf5bb153495 100644 --- a/drivers/char/tpm/tpm-chip.c +++ b/drivers/char/tpm/tpm-chip.c @@ -158,12 +158,13 @@ static int tpm_class_shutdown(struct device *dev) { struct tpm_chip *chip = container_of(dev, struct tpm_chip, dev); + down_write(&chip->ops_sem); if (chip->flags & TPM_CHIP_FLAG_TPM2) { - down_write(&chip->ops_sem); tpm2_shutdown(chip, TPM2_SU_CLEAR); chip->ops = NULL; - up_write(&chip->ops_sem); } + chip->ops = NULL; + up_write(&chip->ops_sem); return 0; }