| From | Greg Kroah-Hartman <> | Subject | [PATCH 5.4 052/408] ima: Dont ignore errors from crypto_shash_update() | Date | Tue, 27 Oct 2020 14:49:50 +0100 |
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From: Roberto Sassu <roberto.sassu@huawei.com>
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: 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> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
--- security/integrity/ima/ima_crypto.c | 2 ++ 1 file changed, 2 insertions(+)
--- a/security/integrity/ima/ima_crypto.c +++ b/security/integrity/ima/ima_crypto.c @@ -688,6 +688,8 @@ static int ima_calc_boot_aggregate_tfm(c /* now accumulate with current aggregate */ rc = crypto_shash_update(shash, d.digest, crypto_shash_digestsize(tfm)); + if (rc != 0) + return rc; } if (!rc) crypto_shash_final(shash, digest);
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