From: Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com>
To: Stefan Berger <stefanb@linux.ibm.com>
Cc: linux-integrity@vger.kernel.org,
linux-security-module@vger.kernel.org,
James Bottomley <James.Bottomley@HansenPartnership.com>,
Tomas Winkler <tomas.winkler@intel.com>,
Tadeusz Struk <tadeusz.struk@intel.com>,
Stefan Berger <stefanb@linux.vnet.ibm.com>,
Nayna Jain <nayna@linux.ibm.com>,
stable@vger.kernel.org, Peter Huewe <peterhuewe@gmx.de>,
Jason Gunthorpe <jgg@ziepe.ca>, Arnd Bergmann <arnd@arndb.de>,
Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
open list <linux-kernel@vger.kernel.org>
Subject: Re: [PATCH v3 04/16] tpm: call tpm2_flush_space() on error in tpm_try_transmit()
Date: Tue, 6 Nov 2018 07:55:54 +0200 [thread overview]
Message-ID: <20181106055554.GD15575@linux.intel.com> (raw)
In-Reply-To: <c7d48e87-1660-b47b-0dfd-b5daabd1777f@linux.ibm.com>
On Mon, Nov 05, 2018 at 05:01:46PM -0500, Stefan Berger wrote:
> On 11/4/18 8:45 PM, Jarkko Sakkinen wrote:
> > Always call tpm2_flush_space() on failure in tpm_try_transmit() so that
> > the volatile memory of the TPM gets cleared. If /dev/tpm0 does not have
> > sufficient permissions (usually it has), this could leak to the leakage
>
> leak ->lead
>
>
> > of TPM objects. Through /dev/tpmrm0 this issue does not raise new
> > security concerns.
> >
> > Cc: stable@vger.kernel.org
> > Fixes: 745b361e989a ("tpm:tpm: infrastructure for TPM spaces")
> > Signed-off-by: Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com>
> > ---
> > drivers/char/tpm/tpm-interface.c | 28 +++++++++++++++++-----------
> > drivers/char/tpm/tpm.h | 1 +
> > drivers/char/tpm/tpm2-space.c | 2 +-
> > 3 files changed, 19 insertions(+), 12 deletions(-)
> >
> > diff --git a/drivers/char/tpm/tpm-interface.c b/drivers/char/tpm/tpm-interface.c
> > index 64510ed81b46..ecda6f96cde0 100644
> > --- a/drivers/char/tpm/tpm-interface.c
> > +++ b/drivers/char/tpm/tpm-interface.c
> > @@ -224,14 +224,14 @@ static ssize_t tpm_try_transmit(struct tpm_chip *chip,
> >
> > rc = tpm2_prepare_space(chip, space, ordinal, buf);
> > if (rc)
> > - goto out;
> > + goto out_idle;
> >
> > rc = chip->ops->send(chip, buf, count);
> > if (rc < 0) {
> > if (rc != -EPIPE)
> > dev_err(&chip->dev,
> > "%s: tpm_send: error %d\n", __func__, rc);
> > - goto out;
> > + goto out_space;
> > }
> >
> > if (chip->flags & TPM_CHIP_FLAG_IRQ)
> > @@ -247,7 +247,7 @@ static ssize_t tpm_try_transmit(struct tpm_chip *chip,
> > if (chip->ops->req_canceled(chip, status)) {
> > dev_err(&chip->dev, "Operation Canceled\n");
> > rc = -ECANCELED;
> > - goto out;
> > + goto out_space;
> > }
> >
> > tpm_msleep(TPM_TIMEOUT_POLL);
> > @@ -257,7 +257,7 @@ static ssize_t tpm_try_transmit(struct tpm_chip *chip,
> > chip->ops->cancel(chip);
> > dev_err(&chip->dev, "Operation Timed out\n");
> > rc = -ETIME;
> > - goto out;
> > + goto out_space;
> >
> > out_recv:
> > len = chip->ops->recv(chip, buf, bufsiz);
> > @@ -265,22 +265,28 @@ static ssize_t tpm_try_transmit(struct tpm_chip *chip,
> > rc = len;
> > dev_err(&chip->dev,
> > "tpm_transmit: tpm_recv: error %d\n", rc);
> > - goto out;
> > + goto out_idle;
>
> Why not jump to out_space here and in 2 instances below?
Ugh, should (and meant) to be like that. Thanks!
/Jarkko
next prev parent reply other threads:[~2018-11-06 5:56 UTC|newest]
Thread overview: 33+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-11-05 1:45 [PATCH v3 00/16] Remove nested TPM operations Jarkko Sakkinen
2018-11-05 1:45 ` [PATCH v3 01/16] tpm: use tpm_buf in tpm_transmit_cmd() as the IO parameter Jarkko Sakkinen
2018-11-05 21:48 ` Stefan Berger
2018-11-06 5:52 ` Jarkko Sakkinen
2018-11-05 1:45 ` [PATCH v3 02/16] tpm: fix invalid return value in pubek_show() Jarkko Sakkinen
2018-11-05 21:51 ` Stefan Berger
2018-11-05 1:45 ` [PATCH v3 03/16] tpm: return 0 from pcrs_show() when tpm1_pcr_read() fails Jarkko Sakkinen
2018-11-05 21:54 ` Stefan Berger
2018-11-06 5:54 ` Jarkko Sakkinen
2018-11-05 1:45 ` [PATCH v3 04/16] tpm: call tpm2_flush_space() on error in tpm_try_transmit() Jarkko Sakkinen
2018-11-05 22:01 ` Stefan Berger
2018-11-06 5:55 ` Jarkko Sakkinen [this message]
2018-11-05 1:45 ` [PATCH v3 05/16] tpm: print tpm2_commit_space() error inside tpm2_commit_space() Jarkko Sakkinen
2018-11-05 22:04 ` Stefan Berger
2018-11-06 5:58 ` Jarkko Sakkinen
2018-11-05 1:45 ` [PATCH v3 06/16] tpm: clean up tpm_try_transmit() error handling flow Jarkko Sakkinen
2018-11-05 22:20 ` Stefan Berger
2018-11-06 6:01 ` Jarkko Sakkinen
2018-11-05 1:45 ` [PATCH v3 07/16] tpm: access command header through struct in tpm_try_transmit() Jarkko Sakkinen
2018-11-05 22:26 ` Stefan Berger
2018-11-06 6:08 ` Jarkko Sakkinen
2018-11-05 1:45 ` [PATCH v3 08/16] tpm: move tpm_validate_commmand() to tpm2-space.c Jarkko Sakkinen
2018-11-05 22:36 ` Stefan Berger
2018-11-06 6:10 ` Jarkko Sakkinen
2018-11-05 1:45 ` [PATCH v3 09/16] tpm: encapsulate tpm_dev_transmit() Jarkko Sakkinen
2018-11-06 15:17 ` Stefan Berger
2018-11-05 1:45 ` [PATCH v3 10/16] tpm: move TPM space code out of tpm_transmit() Jarkko Sakkinen
2018-11-05 1:45 ` [PATCH v3 12/16] tpm: use tpm_try_get_ops() in tpm-sysfs.c Jarkko Sakkinen
2018-11-05 1:45 ` [PATCH v3 13/16] tpm: remove TPM_TRANSMIT_UNLOCKED flag Jarkko Sakkinen
2018-11-05 1:45 ` [PATCH v3 14/16] tpm: introduce tpm_chip_start() and tpm_chip_stop() Jarkko Sakkinen
2018-11-05 1:45 ` [PATCH v3 15/16] tpm: take TPM chip power gating out of tpm_transmit() Jarkko Sakkinen
2018-11-05 1:45 ` [PATCH v3 16/16] tpm: remove @flags from tpm_transmit() Jarkko Sakkinen
[not found] ` <20181105014552.20262-12-jarkko.sakkinen@linux.intel.com>
2018-11-06 15:25 ` [PATCH v3 11/16] tpm: remove @space " Stefan Berger
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=20181106055554.GD15575@linux.intel.com \
--to=jarkko.sakkinen@linux.intel.com \
--cc=James.Bottomley@HansenPartnership.com \
--cc=arnd@arndb.de \
--cc=gregkh@linuxfoundation.org \
--cc=jgg@ziepe.ca \
--cc=linux-integrity@vger.kernel.org \
--cc=linux-kernel@vger.kernel.org \
--cc=linux-security-module@vger.kernel.org \
--cc=nayna@linux.ibm.com \
--cc=peterhuewe@gmx.de \
--cc=stable@vger.kernel.org \
--cc=stefanb@linux.ibm.com \
--cc=stefanb@linux.vnet.ibm.com \
--cc=tadeusz.struk@intel.com \
--cc=tomas.winkler@intel.com \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).