[PATCH v9 12/25] security: Introduce file_post_open hook
Paul Moore
paul at paul-moore.com
Thu Feb 8 03:18:43 UTC 2024
On Jan 15, 2024 Roberto Sassu <roberto.sassu at huaweicloud.com> wrote:
>
> In preparation to move IMA and EVM to the LSM infrastructure, introduce the
> file_post_open hook. Also, export security_file_post_open() for NFS.
>
> Based on policy, IMA calculates the digest of the file content and
> extends the TPM with the digest, verifies the file's integrity based on
> the digest, and/or includes the file digest in the audit log.
>
> LSMs could similarly take action depending on the file content and the
> access mask requested with open().
>
> The new hook returns a value and can cause the open to be aborted.
>
> Signed-off-by: Roberto Sassu <roberto.sassu at huawei.com>
> Reviewed-by: Stefan Berger <stefanb at linux.ibm.com>
> Acked-by: Casey Schaufler <casey at schaufler-ca.com>
> Reviewed-by: Mimi Zohar <zohar at linux.ibm.com>
> ---
> fs/namei.c | 2 ++
> fs/nfsd/vfs.c | 6 ++++++
> include/linux/lsm_hook_defs.h | 1 +
> include/linux/security.h | 6 ++++++
> security/security.c | 17 +++++++++++++++++
> 5 files changed, 32 insertions(+)
Acked-by: Paul Moore <paul at paul-moore.com>
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