diff options
| author | Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com> | 2016-08-16 22:00:38 +0300 |
|---|---|---|
| committer | Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com> | 2016-09-15 16:04:21 +0300 |
| commit | d4816edfe706497a8525480c1685ceb9871bc118 (patch) | |
| tree | 73c4afa873f131ab70998332b9f4ece9e6f83d24 /drivers/char/tpm/tpm.h | |
| parent | b7d7b28471072fc23e7b573aef89c14438092223 (diff) | |
tpm: fix a race condition in tpm2_unseal_trusted()
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.
Fixes: 0fe5480303a1 ("keys, trusted: seal/unseal with TPM 2.0 chips")
Cc: stable@vger.kernel.org
Signed-off-by: Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com>
Reviewed-by: Jason Gunthorpe <jgunthorpe@obsidianresearch.com>
Diffstat (limited to 'drivers/char/tpm/tpm.h')
| -rw-r--r-- | drivers/char/tpm/tpm.h | 12 |
1 files changed, 8 insertions, 4 deletions
diff --git a/drivers/char/tpm/tpm.h b/drivers/char/tpm/tpm.h index 3e32d5bd2dc6..b0585e99da49 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); |