Re: [PATCH v9 16/25] security: Introduce inode_post_set_acl hook
From: Paul Moore <paul@paul-moore.com>
Date: 2024-02-08 03:18:50
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_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 + include/linux/lsm_hook_defs.h | 2 ++ include/linux/security.h | 7 +++++++ security/security.c | 17 +++++++++++++++++ 4 files changed, 27 insertions(+)
Acked-by: Paul Moore <paul@paul-moore.com> -- paul-moore.com