On Mon, Jan 15, 2024 at 07:18:00PM +0100, Roberto Sassu wrote:
From: Roberto Sassu roberto.sassu@huawei.com
In preparation for moving IMA and EVM to the LSM infrastructure, introduce the inode_post_set_acl hook.
At inode_set_acl hook, EVM verifies the file's existing HMAC value. At inode_post_set_acl, EVM re-calculates the file's HMAC based on the modified POSIX ACL and other file metadata.
Other LSMs could similarly take some action after successful POSIX ACL change.
The new hook cannot return an error and cannot cause the operation to be reverted.
Signed-off-by: Roberto Sassu roberto.sassu@huawei.com Reviewed-by: Stefan Berger stefanb@linux.ibm.com Acked-by: Casey Schaufler casey@schaufler-ca.com Reviewed-by: Mimi Zohar zohar@linux.ibm.com
fs/posix_acl.c | 1 +
Acked-by: Christian Brauner brauner@kernel.org