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| author | Roberto Sassu <roberto.sassu@huawei.com> | 2020-09-04 12:23:28 +0300 |
|---|---|---|
| committer | Mimi Zohar <zohar@linux.ibm.com> | 2020-09-15 20:47:37 +0300 |
| commit | 60386b854008adc951c470067f90a2d85b5d520f (patch) | |
| tree | 8feb76eb46156dc4e0c641c0749ad833f3ecabaf /security/integrity | |
| parent | f60c826d031817772b634c0cda37794ce6d7946a (diff) | |
| download | linux-60386b854008adc951c470067f90a2d85b5d520f.tar.xz | |
ima: Don't ignore errors from crypto_shash_update()
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: 3323eec921efd ("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>
Diffstat (limited to 'security/integrity')
| -rw-r--r-- | security/integrity/ima/ima_crypto.c | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/security/integrity/ima/ima_crypto.c b/security/integrity/ima/ima_crypto.c index 011c3c76af86..21989fa0c107 100644 --- a/security/integrity/ima/ima_crypto.c +++ b/security/integrity/ima/ima_crypto.c @@ -829,6 +829,8 @@ static int ima_calc_boot_aggregate_tfm(char *digest, u16 alg_id, /* now accumulate with current aggregate */ rc = crypto_shash_update(shash, d.digest, crypto_shash_digestsize(tfm)); + if (rc != 0) + return rc; } /* * Extend cumulative digest over TPM registers 8-9, which contain |