brain-hackers_pepepper-mirror/linux-brain
1
0
Fork 0
mirror of https://github.com/brain-hackers/linux-brain.git synced 2024-06-09 07:16:21 +09:00
Code Issues Projects Releases Wiki Activity

tpm: Initialize crypto_id of allocated_banks to HASH_ALGO__LAST

Browse Source 
commit dc10e4181c05a2315ddc375e963b7c763b5ee0df upstream.

chip->allocated_banks, an array of tpm_bank_info structures, contains the
list of TPM algorithm IDs of allocated PCR banks. It also contains the
corresponding ID of the crypto subsystem, so that users of the TPM driver
can calculate a digest for a PCR extend operation.

However, if there is no mapping between TPM algorithm ID and crypto ID, the
crypto_id field of tpm_bank_info remains set to zero (the array is
allocated and initialized with kcalloc() in tpm2_get_pcr_allocation()).
Zero should not be used as value for unknown mappings, as it is a valid
crypto ID (HASH_ALGO_MD4).

Thus, initialize crypto_id to HASH_ALGO__LAST.

Cc: stable@vger.kernel.org # 5.1.x
Fixes: 879b589210 ("tpm: retrieve digest size of unknown algorithms with PCR read")
Signed-off-by: Roberto Sassu <roberto.sassu@huawei.com>
Reviewed-by: Petr Vorel <pvorel@suse.cz>
Reviewed-by: Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com>
Signed-off-by: Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Roberto Sassu 2020-02-10 11:00:41 +01:00 committed by Greg Kroah-Hartman
parent 9f83363875
commit 909149bf61
1 changed files with 2 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
drivers/char/tpm/tpm2-cmd.c
View File

@ -831,6 +831,8 @@ static int tpm2_init_bank_info(struct tpm_chip *chip, u32 bank_index)
return 0;
}
bank->crypto_id = HASH_ALGO__LAST;
return tpm2_pcr_read(chip, 0, &digest, &bank->digest_size);
}