PWN-Hunter/android_kernel_xiaomi_sdm845
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

ima: Don't ignore errors from crypto_shash_update()

Browse Source 
commit 60386b854008adc951c470067f90a2d85b5d520f upstream.

Errors returned by crypto_shash_update() are not checked in
ima_calc_boot_aggregate_tfm() and thus can be overwritten at the next
iteration of the loop. This patch adds a check after calling
crypto_shash_update() and returns immediately if the result is not zero.

Cc: stable@vger.kernel.org
Fixes: 3323eec921 ("integrity: IMA as an integrity service provider")
Signed-off-by: Roberto Sassu <roberto.sassu@huawei.com>
Signed-off-by: Mimi Zohar <zohar@linux.ibm.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Roberto Sassu 2020-09-04 11:23:28 +02:00 committed by Greg Kroah-Hartman
parent 6049f7d96a
commit ff0ad9d345
1 changed files with 2 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
security/integrity/ima/ima_crypto.c
View File

@ -683,6 +683,8 @@ static int __init ima_calc_boot_aggregate_tfm(char *digest,
ima_pcrread(i, pcr_i);
/* now accumulate with current aggregate */
rc = crypto_shash_update(shash, pcr_i, TPM_DIGEST_SIZE);
if (rc != 0)
return rc;
}
if (!rc)
crypto_shash_final(shash, digest);