evm: reset EVM status when file attributes changes

EVM verification status is cached in iint->evm_status
and if it was successful, never re-verified again when
IMA passes 'iint' to evm_verifyxattr().

When file attribute or extended attributes changes we may
wish to re-verify EVM integrity as well. For example,
after setting digital signature we may need to re-verify
the signature and update iint->flags that there is EVM

This patch enables that by resetting evm_status to

Changes in v2:
* Flag setting moved to EVM layer

Signed-off-by: Dmitry Kasatkin <dmitry.kasatkin@huawei.com>
Signed-off-by: Mimi Zohar <zohar@linux.vnet.ibm.com>
1 file changed