tree d3c558434ff83206d48dfddaea373b87575e5537
parent 6049f7d96af57b5342ac0966feb2846877fe62c5
author Roberto Sassu <roberto.sassu@huawei.com> 1599211408 +0200
committer Greg Kroah-Hartman <gregkh@linuxfoundation.org> 1603958732 +0100

ima: Don't ignore errors from crypto_shash_update()

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>