Re: [PATCH v9 17/25] security: Introduce inode_post_remove_acl hook
From: Paul Moore <paul@paul-moore.com>
Date: 2024-02-08 03:18:51
Also in:
keyrings, linux-fsdevel, linux-integrity, linux-kselftest, linux-nfs, lkml, selinux
On Jan 15, 2024 Roberto Sassu [off-list ref] wrote:
In preparation for moving IMA and EVM to the LSM infrastructure, introduce the inode_post_remove_acl hook. At inode_remove_acl hook, EVM verifies the file's existing HMAC value. At inode_post_remove_acl, EVM re-calculates the file's HMAC with the passed POSIX ACL removed and other file metadata. Other LSMs could similarly take some action after successful POSIX ACL removal. 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 + include/linux/lsm_hook_defs.h | 2 ++ include/linux/security.h | 8 ++++++++ security/security.c | 17 +++++++++++++++++ 4 files changed, 28 insertions(+)
Acked-by: Paul Moore <paul@paul-moore.com> -- paul-moore.com