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=-8.1 required=3.0 tests=DKIM_INVALID,DKIM_SIGNED, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY, SPF_HELO_NONE,SPF_PASS,USER_AGENT_SANE_2 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 4F97BC43603 for ; Mon, 9 Dec 2019 08:31:40 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 144DF20726 for ; Mon, 9 Dec 2019 08:31:40 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=fail reason="signature verification failed" (2048-bit key) header.d=infradead.org header.i=@infradead.org header.b="aalj54Qh" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727183AbfLIIbi (ORCPT ); Mon, 9 Dec 2019 03:31:38 -0500 Received: from bombadil.infradead.org ([198.137.202.133]:56972 "EHLO bombadil.infradead.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727044AbfLIIbi (ORCPT ); Mon, 9 Dec 2019 03:31:38 -0500 DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=infradead.org; s=bombadil.20170209; h=Mime-Version:Content-Type:References: In-Reply-To:Date:Cc:To:From:Subject:Message-ID:Sender:Reply-To: Content-Transfer-Encoding:Content-ID:Content-Description:Resent-Date: Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Id: List-Help:List-Unsubscribe:List-Subscribe:List-Post:List-Owner:List-Archive; bh=WJUa7JIlVzrzcQTc5hNMLLfcBo2LhH5Rdv4Gm3yp2BE=; b=aalj54QhWQMxrc/0AveeHugiq 0i6mfinAuyb1YxJlj2LRTNc+3OBZA1FuRIeF2i7KwJlGMmEbx7/gkl2sRfqj80Z1H0HNslv8/VZPi L6qpE0sSLLNX1JG1SNERUzI1RI7ADJ5e3REmxHCnew6JjhuxQ3Nl53mA3kXxOFz4nnEWsmB4rCidt Kjh+kL5R6Zh+tI33iHcF6CzmVuGk9KrV4uZWkoSoWLDxYyPq7Tk+efNB+FI5aVneH5noQBlDsuPEH j0i5YxUW4/aVg4knoLXFIj3StqMueER4xSBZPGSyZgOBE706g8xgCiU6xJLVYB1DEs6sXDEIu3qnK hrzchzPiA==; Received: from 54-240-197-228.amazon.com ([54.240.197.228] helo=freeip.amazon.com) by bombadil.infradead.org with esmtpsa (Exim 4.92.3 #3 (Red Hat Linux)) id 1ieES9-0005EW-Rl; Mon, 09 Dec 2019 08:31:38 +0000 Message-ID: <89e3c7c531b228673089ad892d5e6390642ced85.camel@infradead.org> Subject: Re: [PATCH 1/8] security: keys: trusted: flush the key handle after use From: David Woodhouse To: James Bottomley , linux-integrity@vger.kernel.org Cc: Mimi Zohar , Jarkko Sakkinen Date: Mon, 09 Dec 2019 08:31:35 +0000 In-Reply-To: <1575781659.14069.9.camel@HansenPartnership.com> References: <1575781600.14069.8.camel@HansenPartnership.com> <1575781659.14069.9.camel@HansenPartnership.com> Content-Type: multipart/signed; micalg="sha-256"; protocol="application/x-pkcs7-signature"; boundary="=-YlNkMhfoP1zJwDaiGoI/" X-Mailer: Evolution 3.28.5-0ubuntu0.18.04.1 Mime-Version: 1.0 X-SRS-Rewrite: SMTP reverse-path rewritten from by bombadil.infradead.org. See http://www.infradead.org/rpr.html Sender: linux-integrity-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-integrity@vger.kernel.org --=-YlNkMhfoP1zJwDaiGoI/ Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable On Sat, 2019-12-07 at 21:07 -0800, James Bottomley wrote: > The trusted keys code currently loads a blob into the TPM and unseals > on the handle. However, it never flushes the handle meaning that > volatile contexts build up until the TPM becomes unusable. Fix this > by flushing the handle after the unseal. >=20 > Signed-off-by: James Bottomley > --- > drivers/char/tpm/tpm.h | 1 - > drivers/char/tpm/tpm2-cmd.c | 1 + > include/linux/tpm.h | 1 + > security/keys/trusted-keys/trusted_tpm2.c | 1 + > 4 files changed, 3 insertions(+), 1 deletion(-) >=20 > diff --git a/drivers/char/tpm/tpm.h b/drivers/char/tpm/tpm.h > index b9e1547be6b5..5620747da0cf 100644 > --- a/drivers/char/tpm/tpm.h > +++ b/drivers/char/tpm/tpm.h > @@ -218,7 +218,6 @@ int tpm2_pcr_read(struct tpm_chip *chip, u32 pcr_idx, > int tpm2_pcr_extend(struct tpm_chip *chip, u32 pcr_idx, > struct tpm_digest *digests); > int tpm2_get_random(struct tpm_chip *chip, u8 *dest, size_t max); > -void tpm2_flush_context(struct tpm_chip *chip, u32 handle); > ssize_t tpm2_get_tpm_pt(struct tpm_chip *chip, u32 property_id, > u32 *value, const char *desc); > =20 > diff --git a/drivers/char/tpm/tpm2-cmd.c b/drivers/char/tpm/tpm2-cmd.c > index fdb457704aa7..b87592f4a6c7 100644 > --- a/drivers/char/tpm/tpm2-cmd.c > +++ b/drivers/char/tpm/tpm2-cmd.c > @@ -362,6 +362,7 @@ void tpm2_flush_context(struct tpm_chip *chip, u32 ha= ndle) > tpm_transmit_cmd(chip, &buf, 0, "flushing context"); > tpm_buf_destroy(&buf); > } > +EXPORT_SYMBOL(tpm2_flush_context); Everything else is EXPORT_SYMBOL_GPL(). 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