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Date: Wed, 1 Feb 2017 21:49:40 +0200
From: Jarkko Sakkinen <jarkko.sakkinen@...ux.intel.com>
To: tpmdd-devel@...ts.sourceforge.net
Cc: linux-security-module@...r.kernel.org,
Peter Huewe <peterhuewe@....de>,
Marcel Selhorst <tpmdd@...horst.net>,
Jason Gunthorpe <jgunthorpe@...idianresearch.com>,
open list <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] tpm: fix parameter order in tpm_getcap()
On Wed, Feb 01, 2017 at 08:48:07PM +0200, Jarkko Sakkinen wrote:
> The parameter order mismatches tpm_transmit_cmd().
>
> Fixes: c659af78eb7b ("tpm: Check size of response before accessing data")
> Signed-off-by: Jarkko Sakkinen <jarkko.sakkinen@...ux.intel.com>
Maybe it's better not to rush this into release as it is an cosmetic
issue only but spreads around the codebase (saw the kbuld test robot
mail).
/Jarkko
> ---
> drivers/char/tpm/tpm-interface.c | 14 +++++++-------
> drivers/char/tpm/tpm-sysfs.c | 33 ++++++++++++++++-----------------
> drivers/char/tpm/tpm.h | 2 +-
> 3 files changed, 24 insertions(+), 25 deletions(-)
>
> diff --git a/drivers/char/tpm/tpm-interface.c b/drivers/char/tpm/tpm-interface.c
> index 423938e..bcce061 100644
> --- a/drivers/char/tpm/tpm-interface.c
> +++ b/drivers/char/tpm/tpm-interface.c
> @@ -478,7 +478,7 @@ static const struct tpm_input_header tpm_getcap_header = {
> };
>
> ssize_t tpm_getcap(struct tpm_chip *chip, u32 subcap_id, cap_t *cap,
> - const char *desc, size_t min_cap_length)
> + size_t min_cap_length, const char *desc)
> {
> struct tpm_cmd_t tpm_cmd;
> int rc;
> @@ -555,8 +555,8 @@ int tpm_get_timeouts(struct tpm_chip *chip)
> return 0;
> }
>
> - rc = tpm_getcap(chip, TPM_CAP_PROP_TIS_TIMEOUT, &cap, NULL,
> - sizeof(cap.timeout));
> + rc = tpm_getcap(chip, TPM_CAP_PROP_TIS_TIMEOUT, &cap,
> + sizeof(cap.timeout), NULL);
> if (rc == TPM_ERR_INVALID_POSTINIT) {
> /* The TPM is not started, we are the first to talk to it.
> Execute a startup command. */
> @@ -565,8 +565,8 @@ int tpm_get_timeouts(struct tpm_chip *chip)
> return rc;
>
> rc = tpm_getcap(chip, TPM_CAP_PROP_TIS_TIMEOUT, &cap,
> - "attempting to determine the timeouts",
> - sizeof(cap.timeout));
> + sizeof(cap.timeout),
> + "attempting to determine the timeouts");
> }
>
> if (rc) {
> @@ -630,8 +630,8 @@ int tpm_get_timeouts(struct tpm_chip *chip)
> chip->timeout_d = usecs_to_jiffies(timeout_eff[3]);
>
> rc = tpm_getcap(chip, TPM_CAP_PROP_TIS_DURATION, &cap,
> - "attempting to determine the durations",
> - sizeof(cap.duration));
> + sizeof(cap.duration),
> + "attempting to determine the durations");
> if (rc)
> return rc;
>
> diff --git a/drivers/char/tpm/tpm-sysfs.c b/drivers/char/tpm/tpm-sysfs.c
> index 2f596d7..fb9b7fe 100644
> --- a/drivers/char/tpm/tpm-sysfs.c
> +++ b/drivers/char/tpm/tpm-sysfs.c
> @@ -96,9 +96,8 @@ static ssize_t pcrs_show(struct device *dev, struct device_attribute *attr,
> char *str = buf;
> struct tpm_chip *chip = to_tpm_chip(dev);
>
> - rc = tpm_getcap(chip, TPM_CAP_PROP_PCR, &cap,
> - "attempting to determine the number of PCRS",
> - sizeof(cap.num_pcrs));
> + rc = tpm_getcap(chip, TPM_CAP_PROP_PCR, &cap, sizeof(cap.num_pcrs),
> + "attempting to determine the number of PCRS");
> if (rc)
> return 0;
>
> @@ -123,8 +122,8 @@ static ssize_t enabled_show(struct device *dev, struct device_attribute *attr,
> ssize_t rc;
>
> rc = tpm_getcap(to_tpm_chip(dev), TPM_CAP_FLAG_PERM, &cap,
> - "attempting to determine the permanent enabled state",
> - sizeof(cap.perm_flags));
> + sizeof(cap.perm_flags),
> + "attempting to determine the permanent enabled state");
> if (rc)
> return 0;
>
> @@ -140,8 +139,8 @@ static ssize_t active_show(struct device *dev, struct device_attribute *attr,
> ssize_t rc;
>
> rc = tpm_getcap(to_tpm_chip(dev), TPM_CAP_FLAG_PERM, &cap,
> - "attempting to determine the permanent active state",
> - sizeof(cap.perm_flags));
> + sizeof(cap.perm_flags),
> + "attempting to determine the permanent active state");
> if (rc)
> return 0;
>
> @@ -157,8 +156,8 @@ static ssize_t owned_show(struct device *dev, struct device_attribute *attr,
> ssize_t rc;
>
> rc = tpm_getcap(to_tpm_chip(dev), TPM_CAP_PROP_OWNER, &cap,
> - "attempting to determine the owner state",
> - sizeof(cap.owned));
> + sizeof(cap.owned),
> + "attempting to determine the owner state");
> if (rc)
> return 0;
>
> @@ -174,8 +173,8 @@ static ssize_t temp_deactivated_show(struct device *dev,
> ssize_t rc;
>
> rc = tpm_getcap(to_tpm_chip(dev), TPM_CAP_FLAG_VOL, &cap,
> - "attempting to determine the temporary state",
> - sizeof(cap.stclear_flags));
> + sizeof(cap.stclear_flags),
> + "attempting to determine the temporary state");
> if (rc)
> return 0;
>
> @@ -193,8 +192,8 @@ static ssize_t caps_show(struct device *dev, struct device_attribute *attr,
> char *str = buf;
>
> rc = tpm_getcap(chip, TPM_CAP_PROP_MANUFACTURER, &cap,
> - "attempting to determine the manufacturer",
> - sizeof(cap.manufacturer_id));
> + sizeof(cap.manufacturer_id),
> + "attempting to determine the manufacturer");
> if (rc)
> return 0;
> str += sprintf(str, "Manufacturer: 0x%x\n",
> @@ -202,8 +201,8 @@ static ssize_t caps_show(struct device *dev, struct device_attribute *attr,
>
> /* Try to get a TPM version 1.2 TPM_CAP_VERSION_INFO */
> rc = tpm_getcap(chip, TPM_CAP_VERSION_1_2, &cap,
> - "attempting to determine the 1.2 version",
> - sizeof(cap.tpm_version_1_2));
> + sizeof(cap.tpm_version_1_2),
> + "attempting to determine the 1.2 version");
> if (!rc) {
> str += sprintf(str,
> "TCG version: %d.%d\nFirmware version: %d.%d\n",
> @@ -214,8 +213,8 @@ static ssize_t caps_show(struct device *dev, struct device_attribute *attr,
> } else {
> /* Otherwise just use TPM_STRUCT_VER */
> rc = tpm_getcap(chip, TPM_CAP_VERSION_1_1, &cap,
> - "attempting to determine the 1.1 version",
> - sizeof(cap.tpm_version));
> + sizeof(cap.tpm_version),
> + "attempting to determine the 1.1 version");
> if (rc)
> return 0;
> str += sprintf(str,
> diff --git a/drivers/char/tpm/tpm.h b/drivers/char/tpm/tpm.h
> index bff37be..3f76825 100644
> --- a/drivers/char/tpm/tpm.h
> +++ b/drivers/char/tpm/tpm.h
> @@ -499,7 +499,7 @@ ssize_t tpm_transmit_cmd(struct tpm_chip *chip, const void *buf, size_t bufsiz,
> size_t min_rsp_body_len, unsigned int flags,
> const char *desc);
> ssize_t tpm_getcap(struct tpm_chip *chip, u32 subcap_id, cap_t *cap,
> - const char *desc, size_t min_cap_length);
> + size_t min_cap_length, const char *desc);
> int tpm_get_timeouts(struct tpm_chip *);
> int tpm1_auto_startup(struct tpm_chip *chip);
> int tpm_do_selftest(struct tpm_chip *chip);
> --
> 2.9.3
>
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