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Message-ID: <20160830101943.GA12614@intel.com>
Date: Tue, 30 Aug 2016 13:19:43 +0300
From: Jarkko Sakkinen <jarkko.sakkinen@...ux.intel.com>
To: Jason Gunthorpe <jgunthorpe@...idianresearch.com>
Cc: stable@...r.kernel.org, Marcel Selhorst <tpmdd@...horst.net>,
Jason Gunthorpe <jgunthorpe@...idianresearch.com>,
"moderated list:TPM DEVICE DRIVER"
<tpmdd-devel@...ts.sourceforge.net>,
open list <linux-kernel@...r.kernel.org>,
Peter Huewe <peterhuewe@....de>
Subject: Re: [PATCH v6] tpm: fix a race condition in tpm2_unseal_trusted()
On Tue, Aug 30, 2016 at 01:51:06AM +0300, Jarkko Sakkinen wrote:
> Unseal and load operations should be done as an atomic operation. This
> commit introduces unlocked tpm_transmit() so that tpm2_unseal_trusted()
> can do the locking by itself.
>
> v2: Introduced an unlocked unseal operation instead of changing locking
> strategy in order to make less intrusive bug fix and thus more
> backportable.
>
> v3: Have also separate __tpm_transmit() that takes 'flags' in order to
> better localize the bug fix and make it easier to backport.
>
> v4: Cleaned up the control flow in tpm2_unseal_trusted. Added the
> missing 'Fixes' line.
>
> v5: Previous versions did not set the enum to any value, so it was set
> to zero. Changed enum to TPM_TRANSMIT_UNLOCKED because it is
> guaranteed to catch such situation. With change the common case
> adds so little clutter that the wrappers do not make sense anymore.
>
> v6: Added flags parameter to internal TPM command wrappers to have
> an expected default behavior and documented them.
Jason, I made exactly the changes you requested + documented things
much better than they used to be. Are we now good with this? :)
/Jarkko
>
> Fixes: 0fe5480303a1 ("keys, trusted: seal/unseal with TPM 2.0 chips")
> CC: stable@...r.kernel.org
> Signed-off-by: Jarkko Sakkinen <jarkko.sakkinen@...ux.intel.com>
> ---
> drivers/char/tpm/tpm-dev.c | 2 +-
> drivers/char/tpm/tpm-interface.c | 51 +++++++++++---------
> drivers/char/tpm/tpm-sysfs.c | 2 +-
> drivers/char/tpm/tpm.h | 12 +++--
> drivers/char/tpm/tpm2-cmd.c | 101 +++++++++++++++++++++++++--------------
> 5 files changed, 103 insertions(+), 65 deletions(-)
>
> diff --git a/drivers/char/tpm/tpm-dev.c b/drivers/char/tpm/tpm-dev.c
> index f5d4521..912ad30 100644
> --- a/drivers/char/tpm/tpm-dev.c
> +++ b/drivers/char/tpm/tpm-dev.c
> @@ -145,7 +145,7 @@ static ssize_t tpm_write(struct file *file, const char __user *buf,
> return -EPIPE;
> }
> out_size = tpm_transmit(priv->chip, priv->data_buffer,
> - sizeof(priv->data_buffer));
> + sizeof(priv->data_buffer), 0);
>
> tpm_put_ops(priv->chip);
> if (out_size < 0) {
> diff --git a/drivers/char/tpm/tpm-interface.c b/drivers/char/tpm/tpm-interface.c
> index 1abe2d7..aef20ee 100644
> --- a/drivers/char/tpm/tpm-interface.c
> +++ b/drivers/char/tpm/tpm-interface.c
> @@ -330,8 +330,8 @@ EXPORT_SYMBOL_GPL(tpm_calc_ordinal_duration);
> /*
> * Internal kernel interface to transmit TPM commands
> */
> -ssize_t tpm_transmit(struct tpm_chip *chip, const char *buf,
> - size_t bufsiz)
> +ssize_t tpm_transmit(struct tpm_chip *chip, const u8 *buf, size_t bufsiz,
> + unsigned int flags)
> {
> ssize_t rc;
> u32 count, ordinal;
> @@ -350,7 +350,8 @@ ssize_t tpm_transmit(struct tpm_chip *chip, const char *buf,
> return -E2BIG;
> }
>
> - mutex_lock(&chip->tpm_mutex);
> + if (!(flags & TPM_TRANSMIT_UNLOCKED))
> + mutex_lock(&chip->tpm_mutex);
>
> rc = chip->ops->send(chip, (u8 *) buf, count);
> if (rc < 0) {
> @@ -393,20 +394,21 @@ out_recv:
> dev_err(&chip->dev,
> "tpm_transmit: tpm_recv: error %zd\n", rc);
> out:
> - mutex_unlock(&chip->tpm_mutex);
> + if (!(flags & TPM_TRANSMIT_UNLOCKED))
> + mutex_unlock(&chip->tpm_mutex);
> return rc;
> }
>
> #define TPM_DIGEST_SIZE 20
> #define TPM_RET_CODE_IDX 6
>
> -ssize_t tpm_transmit_cmd(struct tpm_chip *chip, void *cmd,
> - int len, const char *desc)
> +ssize_t tpm_transmit_cmd(struct tpm_chip *chip, const void *cmd,
> + int len, unsigned int flags, const char *desc)
> {
> - struct tpm_output_header *header;
> + const struct tpm_output_header *header;
> int err;
>
> - len = tpm_transmit(chip, (u8 *) cmd, len);
> + len = tpm_transmit(chip, (const u8 *)cmd, len, flags);
> if (len < 0)
> return len;
> else if (len < TPM_HEADER_SIZE)
> @@ -453,7 +455,8 @@ ssize_t tpm_getcap(struct tpm_chip *chip, __be32 subcap_id, cap_t *cap,
> tpm_cmd.params.getcap_in.subcap_size = cpu_to_be32(4);
> tpm_cmd.params.getcap_in.subcap = subcap_id;
> }
> - rc = tpm_transmit_cmd(chip, &tpm_cmd, TPM_INTERNAL_RESULT_SIZE, desc);
> + rc = tpm_transmit_cmd(chip, &tpm_cmd, TPM_INTERNAL_RESULT_SIZE, 0,
> + desc);
> if (!rc)
> *cap = tpm_cmd.params.getcap_out.cap;
> return rc;
> @@ -469,7 +472,7 @@ void tpm_gen_interrupt(struct tpm_chip *chip)
> tpm_cmd.params.getcap_in.subcap_size = cpu_to_be32(4);
> tpm_cmd.params.getcap_in.subcap = TPM_CAP_PROP_TIS_TIMEOUT;
>
> - rc = tpm_transmit_cmd(chip, &tpm_cmd, TPM_INTERNAL_RESULT_SIZE,
> + rc = tpm_transmit_cmd(chip, &tpm_cmd, TPM_INTERNAL_RESULT_SIZE, 0,
> "attempting to determine the timeouts");
> }
> EXPORT_SYMBOL_GPL(tpm_gen_interrupt);
> @@ -490,7 +493,7 @@ static int tpm_startup(struct tpm_chip *chip, __be16 startup_type)
> start_cmd.header.in = tpm_startup_header;
>
> start_cmd.params.startup_in.startup_type = startup_type;
> - return tpm_transmit_cmd(chip, &start_cmd, TPM_INTERNAL_RESULT_SIZE,
> + return tpm_transmit_cmd(chip, &start_cmd, TPM_INTERNAL_RESULT_SIZE, 0,
> "attempting to start the TPM");
> }
>
> @@ -521,7 +524,8 @@ int tpm_get_timeouts(struct tpm_chip *chip)
> tpm_cmd.params.getcap_in.cap = TPM_CAP_PROP;
> tpm_cmd.params.getcap_in.subcap_size = cpu_to_be32(4);
> tpm_cmd.params.getcap_in.subcap = TPM_CAP_PROP_TIS_TIMEOUT;
> - rc = tpm_transmit_cmd(chip, &tpm_cmd, TPM_INTERNAL_RESULT_SIZE, NULL);
> + rc = tpm_transmit_cmd(chip, &tpm_cmd, TPM_INTERNAL_RESULT_SIZE, 0,
> + NULL);
>
> if (rc == TPM_ERR_INVALID_POSTINIT) {
> /* The TPM is not started, we are the first to talk to it.
> @@ -535,7 +539,7 @@ int tpm_get_timeouts(struct tpm_chip *chip)
> tpm_cmd.params.getcap_in.subcap_size = cpu_to_be32(4);
> tpm_cmd.params.getcap_in.subcap = TPM_CAP_PROP_TIS_TIMEOUT;
> rc = tpm_transmit_cmd(chip, &tpm_cmd, TPM_INTERNAL_RESULT_SIZE,
> - NULL);
> + 0, NULL);
> }
> if (rc) {
> dev_err(&chip->dev,
> @@ -596,7 +600,7 @@ duration:
> tpm_cmd.params.getcap_in.subcap_size = cpu_to_be32(4);
> tpm_cmd.params.getcap_in.subcap = TPM_CAP_PROP_TIS_DURATION;
>
> - rc = tpm_transmit_cmd(chip, &tpm_cmd, TPM_INTERNAL_RESULT_SIZE,
> + rc = tpm_transmit_cmd(chip, &tpm_cmd, TPM_INTERNAL_RESULT_SIZE, 0,
> "attempting to determine the durations");
> if (rc)
> return rc;
> @@ -652,7 +656,7 @@ static int tpm_continue_selftest(struct tpm_chip *chip)
> struct tpm_cmd_t cmd;
>
> cmd.header.in = continue_selftest_header;
> - rc = tpm_transmit_cmd(chip, &cmd, CONTINUE_SELFTEST_RESULT_SIZE,
> + rc = tpm_transmit_cmd(chip, &cmd, CONTINUE_SELFTEST_RESULT_SIZE, 0,
> "continue selftest");
> return rc;
> }
> @@ -672,7 +676,7 @@ int tpm_pcr_read_dev(struct tpm_chip *chip, int pcr_idx, u8 *res_buf)
>
> cmd.header.in = pcrread_header;
> cmd.params.pcrread_in.pcr_idx = cpu_to_be32(pcr_idx);
> - rc = tpm_transmit_cmd(chip, &cmd, READ_PCR_RESULT_SIZE,
> + rc = tpm_transmit_cmd(chip, &cmd, READ_PCR_RESULT_SIZE, 0,
> "attempting to read a pcr value");
>
> if (rc == 0)
> @@ -770,7 +774,7 @@ int tpm_pcr_extend(u32 chip_num, int pcr_idx, const u8 *hash)
> cmd.header.in = pcrextend_header;
> cmd.params.pcrextend_in.pcr_idx = cpu_to_be32(pcr_idx);
> memcpy(cmd.params.pcrextend_in.hash, hash, TPM_DIGEST_SIZE);
> - rc = tpm_transmit_cmd(chip, &cmd, EXTEND_PCR_RESULT_SIZE,
> + rc = tpm_transmit_cmd(chip, &cmd, EXTEND_PCR_RESULT_SIZE, 0,
> "attempting extend a PCR value");
>
> tpm_put_ops(chip);
> @@ -809,7 +813,7 @@ int tpm_do_selftest(struct tpm_chip *chip)
> /* Attempt to read a PCR value */
> cmd.header.in = pcrread_header;
> cmd.params.pcrread_in.pcr_idx = cpu_to_be32(0);
> - rc = tpm_transmit(chip, (u8 *) &cmd, READ_PCR_RESULT_SIZE);
> + rc = tpm_transmit(chip, (u8 *) &cmd, READ_PCR_RESULT_SIZE, 0);
> /* Some buggy TPMs will not respond to tpm_tis_ready() for
> * around 300ms while the self test is ongoing, keep trying
> * until the self test duration expires. */
> @@ -879,7 +883,7 @@ int tpm_send(u32 chip_num, void *cmd, size_t buflen)
> if (chip == NULL)
> return -ENODEV;
>
> - rc = tpm_transmit_cmd(chip, cmd, buflen, "attempting tpm_cmd");
> + rc = tpm_transmit_cmd(chip, cmd, buflen, 0, "attempting tpm_cmd");
>
> tpm_put_ops(chip);
> return rc;
> @@ -981,14 +985,15 @@ int tpm_pm_suspend(struct device *dev)
> cmd.params.pcrextend_in.pcr_idx = cpu_to_be32(tpm_suspend_pcr);
> memcpy(cmd.params.pcrextend_in.hash, dummy_hash,
> TPM_DIGEST_SIZE);
> - rc = tpm_transmit_cmd(chip, &cmd, EXTEND_PCR_RESULT_SIZE,
> + rc = tpm_transmit_cmd(chip, &cmd, EXTEND_PCR_RESULT_SIZE, 0,
> "extending dummy pcr before suspend");
> }
>
> /* now do the actual savestate */
> for (try = 0; try < TPM_RETRY; try++) {
> cmd.header.in = savestate_header;
> - rc = tpm_transmit_cmd(chip, &cmd, SAVESTATE_RESULT_SIZE, NULL);
> + rc = tpm_transmit_cmd(chip, &cmd, SAVESTATE_RESULT_SIZE, 0,
> + NULL);
>
> /*
> * If the TPM indicates that it is too busy to respond to
> @@ -1072,8 +1077,8 @@ int tpm_get_random(u32 chip_num, u8 *out, size_t max)
> tpm_cmd.params.getrandom_in.num_bytes = cpu_to_be32(num_bytes);
>
> err = tpm_transmit_cmd(chip, &tpm_cmd,
> - TPM_GETRANDOM_RESULT_SIZE + num_bytes,
> - "attempting get random");
> + TPM_GETRANDOM_RESULT_SIZE + num_bytes,
> + 0, "attempting get random");
> if (err)
> break;
>
> diff --git a/drivers/char/tpm/tpm-sysfs.c b/drivers/char/tpm/tpm-sysfs.c
> index b46cf70..e1f7236 100644
> --- a/drivers/char/tpm/tpm-sysfs.c
> +++ b/drivers/char/tpm/tpm-sysfs.c
> @@ -39,7 +39,7 @@ static ssize_t pubek_show(struct device *dev, struct device_attribute *attr,
> struct tpm_chip *chip = to_tpm_chip(dev);
>
> tpm_cmd.header.in = tpm_readpubek_header;
> - err = tpm_transmit_cmd(chip, &tpm_cmd, READ_PUBEK_RESULT_SIZE,
> + err = tpm_transmit_cmd(chip, &tpm_cmd, READ_PUBEK_RESULT_SIZE, 0,
> "attempting to read the PUBEK");
> if (err)
> goto out;
> diff --git a/drivers/char/tpm/tpm.h b/drivers/char/tpm/tpm.h
> index 3e32d5b..b0585e9 100644
> --- a/drivers/char/tpm/tpm.h
> +++ b/drivers/char/tpm/tpm.h
> @@ -476,12 +476,16 @@ extern dev_t tpm_devt;
> extern const struct file_operations tpm_fops;
> extern struct idr dev_nums_idr;
>
> +enum tpm_transmit_flags {
> + TPM_TRANSMIT_UNLOCKED = BIT(0),
> +};
> +
> +ssize_t tpm_transmit(struct tpm_chip *chip, const u8 *buf, size_t bufsiz,
> + unsigned int flags);
> +ssize_t tpm_transmit_cmd(struct tpm_chip *chip, const void *cmd, int len,
> + unsigned int flags, const char *desc);
> ssize_t tpm_getcap(struct tpm_chip *chip, __be32 subcap_id, cap_t *cap,
> const char *desc);
> -ssize_t tpm_transmit(struct tpm_chip *chip, const char *buf,
> - size_t bufsiz);
> -ssize_t tpm_transmit_cmd(struct tpm_chip *chip, void *cmd, int len,
> - const char *desc);
> extern int tpm_get_timeouts(struct tpm_chip *);
> extern void tpm_gen_interrupt(struct tpm_chip *);
> int tpm1_auto_startup(struct tpm_chip *chip);
> diff --git a/drivers/char/tpm/tpm2-cmd.c b/drivers/char/tpm/tpm2-cmd.c
> index 08c7e23..6b58759 100644
> --- a/drivers/char/tpm/tpm2-cmd.c
> +++ b/drivers/char/tpm/tpm2-cmd.c
> @@ -282,7 +282,7 @@ int tpm2_pcr_read(struct tpm_chip *chip, int pcr_idx, u8 *res_buf)
> sizeof(cmd.params.pcrread_in.pcr_select));
> cmd.params.pcrread_in.pcr_select[pcr_idx >> 3] = 1 << (pcr_idx & 0x7);
>
> - rc = tpm_transmit_cmd(chip, &cmd, sizeof(cmd),
> + rc = tpm_transmit_cmd(chip, &cmd, sizeof(cmd), 0,
> "attempting to read a pcr value");
> if (rc == 0) {
> buf = cmd.params.pcrread_out.digest;
> @@ -330,7 +330,7 @@ int tpm2_pcr_extend(struct tpm_chip *chip, int pcr_idx, const u8 *hash)
> cmd.params.pcrextend_in.hash_alg = cpu_to_be16(TPM2_ALG_SHA1);
> memcpy(cmd.params.pcrextend_in.digest, hash, TPM_DIGEST_SIZE);
>
> - rc = tpm_transmit_cmd(chip, &cmd, sizeof(cmd),
> + rc = tpm_transmit_cmd(chip, &cmd, sizeof(cmd), 0,
> "attempting extend a PCR value");
>
> return rc;
> @@ -376,7 +376,7 @@ int tpm2_get_random(struct tpm_chip *chip, u8 *out, size_t max)
> cmd.header.in = tpm2_getrandom_header;
> cmd.params.getrandom_in.size = cpu_to_be16(num_bytes);
>
> - err = tpm_transmit_cmd(chip, &cmd, sizeof(cmd),
> + err = tpm_transmit_cmd(chip, &cmd, sizeof(cmd), 0,
> "attempting get random");
> if (err)
> break;
> @@ -434,12 +434,12 @@ static void tpm2_buf_append_auth(struct tpm_buf *buf, u32 session_handle,
> }
>
> /**
> - * tpm2_seal_trusted() - seal a trusted key
> - * @chip_num: A specific chip number for the request or TPM_ANY_NUM
> - * @options: authentication values and other options
> + * tpm2_seal_trusted() - seal the payload of a trusted key
> + * @chip_num: chip number or TPM_ANY_NUM
> * @payload: the key data in clear and encrypted form
> + * @options: authentication values and other options
> *
> - * Returns < 0 on error and 0 on success.
> + * Return: < 0 on error and 0 on success.
> */
> int tpm2_seal_trusted(struct tpm_chip *chip,
> struct trusted_key_payload *payload,
> @@ -512,7 +512,7 @@ int tpm2_seal_trusted(struct tpm_chip *chip,
> goto out;
> }
>
> - rc = tpm_transmit_cmd(chip, buf.data, PAGE_SIZE, "sealing data");
> + rc = tpm_transmit_cmd(chip, buf.data, PAGE_SIZE, 0, "sealing data");
> if (rc)
> goto out;
>
> @@ -538,10 +538,18 @@ out:
> return rc;
> }
>
> -static int tpm2_load(struct tpm_chip *chip,
> - struct trusted_key_payload *payload,
> - struct trusted_key_options *options,
> - u32 *blob_handle)
> +/**
> + * tpm2_load_cmd() - execute a TPM2_Load command
> + * @chip_num: chip number or TPM_ANY_NUM
> + * @payload: the key data in clear and encrypted form
> + * @options: authentication values and other options
> + *
> + * Return: same as with tpm_transmit_cmd
> + */
> +static int tpm2_load_cmd(struct tpm_chip *chip,
> + struct trusted_key_payload *payload,
> + struct trusted_key_options *options,
> + u32 *blob_handle, unsigned int flags)
> {
> struct tpm_buf buf;
> unsigned int private_len;
> @@ -576,7 +584,7 @@ static int tpm2_load(struct tpm_chip *chip,
> goto out;
> }
>
> - rc = tpm_transmit_cmd(chip, buf.data, PAGE_SIZE, "loading blob");
> + rc = tpm_transmit_cmd(chip, buf.data, PAGE_SIZE, flags, "loading blob");
> if (!rc)
> *blob_handle = be32_to_cpup(
> (__be32 *) &buf.data[TPM_HEADER_SIZE]);
> @@ -590,7 +598,16 @@ out:
> return rc;
> }
>
> -static void tpm2_flush_context(struct tpm_chip *chip, u32 handle)
> +/**
> + * tpm2_flush_context_cmd() - execute a TPM2_FlushContext command
> + * @chip_num: chip number or TPM_ANY_NUM
> + * @payload: the key data in clear and encrypted form
> + * @options: authentication values and other options
> + *
> + * Return: same as with tpm_transmit_cmd
> + */
> +static void tpm2_flush_context_cmd(struct tpm_chip *chip, u32 handle,
> + unsigned int flags)
> {
> struct tpm_buf buf;
> int rc;
> @@ -604,7 +621,8 @@ static void tpm2_flush_context(struct tpm_chip *chip, u32 handle)
>
> tpm_buf_append_u32(&buf, handle);
>
> - rc = tpm_transmit_cmd(chip, buf.data, PAGE_SIZE, "flushing context");
> + rc = tpm_transmit_cmd(chip, buf.data, PAGE_SIZE, flags,
> + "flushing context");
> if (rc)
> dev_warn(&chip->dev, "0x%08x was not flushed, rc=%d\n", handle,
> rc);
> @@ -612,10 +630,18 @@ static void tpm2_flush_context(struct tpm_chip *chip, u32 handle)
> tpm_buf_destroy(&buf);
> }
>
> -static int tpm2_unseal(struct tpm_chip *chip,
> - struct trusted_key_payload *payload,
> - struct trusted_key_options *options,
> - u32 blob_handle)
> +/**
> + * tpm2_unseal_cmd() - execute a TPM2_Unload command
> + * @chip_num: chip number or TPM_ANY_NUM
> + * @payload: the key data in clear and encrypted form
> + * @options: authentication values and other options
> + *
> + * Return: same as with tpm_transmit_cmd
> + */
> +static int tpm2_unseal_cmd(struct tpm_chip *chip,
> + struct trusted_key_payload *payload,
> + struct trusted_key_options *options,
> + u32 blob_handle, unsigned int flags)
> {
> struct tpm_buf buf;
> u16 data_len;
> @@ -635,7 +661,7 @@ static int tpm2_unseal(struct tpm_chip *chip,
> options->blobauth /* hmac */,
> TPM_DIGEST_SIZE);
>
> - rc = tpm_transmit_cmd(chip, buf.data, PAGE_SIZE, "unsealing");
> + rc = tpm_transmit_cmd(chip, buf.data, PAGE_SIZE, flags, "unsealing");
> if (rc > 0)
> rc = -EPERM;
>
> @@ -654,12 +680,12 @@ static int tpm2_unseal(struct tpm_chip *chip,
> }
>
> /**
> - * tpm_unseal_trusted() - unseal a trusted key
> - * @chip_num: A specific chip number for the request or TPM_ANY_NUM
> - * @options: authentication values and other options
> + * tpm_unseal_trusted() - unseal the payload of a trusted key
> + * @chip_num: chip number or TPM_ANY_NUM
> * @payload: the key data in clear and encrypted form
> + * @options: authentication values and other options
> *
> - * Returns < 0 on error and 0 on success.
> + * Return: < 0 on error and 0 on success.
> */
> int tpm2_unseal_trusted(struct tpm_chip *chip,
> struct trusted_key_payload *payload,
> @@ -668,14 +694,17 @@ int tpm2_unseal_trusted(struct tpm_chip *chip,
> u32 blob_handle;
> int rc;
>
> - rc = tpm2_load(chip, payload, options, &blob_handle);
> + mutex_lock(&chip->tpm_mutex);
> + rc = tpm2_load_cmd(chip, payload, options, &blob_handle,
> + TPM_TRANSMIT_UNLOCKED);
> if (rc)
> - return rc;
> -
> - rc = tpm2_unseal(chip, payload, options, blob_handle);
> -
> - tpm2_flush_context(chip, blob_handle);
> + goto out;
>
> + rc = tpm2_unseal_cmd(chip, payload, options, blob_handle,
> + TPM_TRANSMIT_UNLOCKED);
> + tpm2_flush_context_cmd(chip, blob_handle, TPM_TRANSMIT_UNLOCKED);
> +out:
> + mutex_unlock(&chip->tpm_mutex);
> return rc;
> }
>
> @@ -701,7 +730,7 @@ ssize_t tpm2_get_tpm_pt(struct tpm_chip *chip, u32 property_id, u32 *value,
> cmd.params.get_tpm_pt_in.property_id = cpu_to_be32(property_id);
> cmd.params.get_tpm_pt_in.property_cnt = cpu_to_be32(1);
>
> - rc = tpm_transmit_cmd(chip, &cmd, sizeof(cmd), desc);
> + rc = tpm_transmit_cmd(chip, &cmd, sizeof(cmd), 0, desc);
> if (!rc)
> *value = be32_to_cpu(cmd.params.get_tpm_pt_out.value);
>
> @@ -735,7 +764,7 @@ static int tpm2_startup(struct tpm_chip *chip, u16 startup_type)
> cmd.header.in = tpm2_startup_header;
>
> cmd.params.startup_in.startup_type = cpu_to_be16(startup_type);
> - return tpm_transmit_cmd(chip, &cmd, sizeof(cmd),
> + return tpm_transmit_cmd(chip, &cmd, sizeof(cmd), 0,
> "attempting to start the TPM");
> }
>
> @@ -763,7 +792,7 @@ void tpm2_shutdown(struct tpm_chip *chip, u16 shutdown_type)
> cmd.header.in = tpm2_shutdown_header;
> cmd.params.startup_in.startup_type = cpu_to_be16(shutdown_type);
>
> - rc = tpm_transmit_cmd(chip, &cmd, sizeof(cmd), "stopping the TPM");
> + rc = tpm_transmit_cmd(chip, &cmd, sizeof(cmd), 0, "stopping the TPM");
>
> /* In places where shutdown command is sent there's no much we can do
> * except print the error code on a system failure.
> @@ -828,7 +857,7 @@ static int tpm2_start_selftest(struct tpm_chip *chip, bool full)
> cmd.header.in = tpm2_selftest_header;
> cmd.params.selftest_in.full_test = full;
>
> - rc = tpm_transmit_cmd(chip, &cmd, TPM2_SELF_TEST_IN_SIZE,
> + rc = tpm_transmit_cmd(chip, &cmd, TPM2_SELF_TEST_IN_SIZE, 0,
> "continue selftest");
>
> /* At least some prototype chips seem to give RC_TESTING error
> @@ -880,7 +909,7 @@ static int tpm2_do_selftest(struct tpm_chip *chip)
> cmd.params.pcrread_in.pcr_select[1] = 0x00;
> cmd.params.pcrread_in.pcr_select[2] = 0x00;
>
> - rc = tpm_transmit_cmd(chip, (u8 *) &cmd, sizeof(cmd), NULL);
> + rc = tpm_transmit_cmd(chip, &cmd, sizeof(cmd), 0, NULL);
> if (rc < 0)
> break;
>
> @@ -928,7 +957,7 @@ int tpm2_probe(struct tpm_chip *chip)
> cmd.params.get_tpm_pt_in.property_id = cpu_to_be32(0x100);
> cmd.params.get_tpm_pt_in.property_cnt = cpu_to_be32(1);
>
> - rc = tpm_transmit(chip, (const char *) &cmd, sizeof(cmd));
> + rc = tpm_transmit(chip, (const u8 *)&cmd, sizeof(cmd), 0);
> if (rc < 0)
> return rc;
> else if (rc < TPM_HEADER_SIZE)
> --
> 2.7.4
>
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