From patchwork Mon May 31 04:51:31 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Jarkko Sakkinen X-Patchwork-Id: 12288653 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=-19.4 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,SPF_HELO_NONE,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 14F44C47082 for ; Mon, 31 May 2021 04:51:51 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id DA9E1610C9 for ; Mon, 31 May 2021 04:51:50 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S229803AbhEaEx2 (ORCPT ); Mon, 31 May 2021 00:53:28 -0400 Received: from mail.kernel.org ([198.145.29.99]:36022 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229717AbhEaEx2 (ORCPT ); Mon, 31 May 2021 00:53:28 -0400 Received: by mail.kernel.org (Postfix) with ESMTPSA id 910FC61057; Mon, 31 May 2021 04:51:47 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1622436709; bh=WRv6fQ3sfkE3Q4OpIzMPN0VfRRUu+eA4XzEtYX3Xfpo=; h=From:To:Cc:Subject:Date:From; b=n1RlIT341qSR9OIDfR/FCEx0dSK3RIx8r1VDbf0PJhwJsxwLTGRyhTsAYr3OPyxAY PX0sVsrgzcyyQYAspc94vvz42qDE22nYlkPwrQEiGiu4gEdcSqstkWQfK6hgAuyRah RkL6x2s733j6f9LTMjLvEIzOPeb1brOYw9Q1o7jgByzx7wT8UoFpgwz/mJaJQMiaFf q1xsuzn22W5gUy1YnU1612Q8RwXXPzBcvvvH2vz/zEZ0wPz4Ytk5pVjNDknx/IiW7s uwjaU2D26Rtl8/KP0Wvw2dl5s8y/Gim082BfEp+kqEytq56bpYwqBwanO6ngdKG0ff bjCXJ0ADpMS5w== From: Jarkko Sakkinen To: linux-integrity@vger.kernel.org Cc: Jarkko Sakkinen , stable@vger.kernel.org, Hans de Goede , Greg KH , Peter Huewe , Jason Gunthorpe , James Bottomley Subject: [PATCH] tpm: Replace WARN_ONCE() with dev_err_once() in tpm_tis_status() Date: Mon, 31 May 2021 07:51:31 +0300 Message-Id: <20210531045131.110616-1-jarkko@kernel.org> X-Mailer: git-send-email 2.31.1 MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-integrity@vger.kernel.org Do not torn down the system when getting invalid status from a TPM chip. This can happen when panic-on-warn is used. In addition, print out the value of TPM_STS.x instead of "invalid status". In order to get the earlier benefits for forensics, also call dump_stack(). Link: https://lore.kernel.org/keyrings/YKzlTR1AzUigShtZ@kroah.com/ Fixes: 55707d531af6 ("tpm_tis: Add a check for invalid status") Cc: stable@vger.kernel.org Cc: Hans de Goede Cc: Greg KH Signed-off-by: Jarkko Sakkinen Reviewed-by: Greg Kroah-Hartman --- drivers/char/tpm/tpm_tis_core.c | 11 ++++++++++- 1 file changed, 10 insertions(+), 1 deletion(-) diff --git a/drivers/char/tpm/tpm_tis_core.c b/drivers/char/tpm/tpm_tis_core.c index 55b9d3965ae1..514a481829c9 100644 --- a/drivers/char/tpm/tpm_tis_core.c +++ b/drivers/char/tpm/tpm_tis_core.c @@ -202,7 +202,16 @@ static u8 tpm_tis_status(struct tpm_chip *chip) * acquired. Usually because tpm_try_get_ops() hasn't * been called before doing a TPM operation. */ - WARN_ONCE(1, "TPM returned invalid status\n"); + dev_err_once(&chip->dev, "invalid TPM_STS.x 0x%02x, dumping stack for forensics\n", + status); + + /* + * Dump stack for forensics, as invalid TPM_STS.x could be + * potentially triggered by impaired tpm_try_get_ops() or + * tpm_find_get_ops(). + */ + dump_stack(); + return 0; }