On Thu Aug 31, 2023 at 1:41 PM EEST, Roberto Sassu wrote:
> From: Roberto Sassu <roberto.sassu@xxxxxxxxxx>
>
> Add the idmap parameter to the definition, so that evm_inode_setattr() can
> be registered as this hook implementation.
>
> Signed-off-by: Roberto Sassu <roberto.sassu@xxxxxxxxxx>
> Reviewed-by: Stefan Berger <stefanb@xxxxxxxxxxxxx>
> Acked-by: Casey Schaufler <casey@xxxxxxxxxxxxxxxx>
> ---
> include/linux/lsm_hook_defs.h | 3 ++-
> security/security.c | 2 +-
> security/selinux/hooks.c | 3 ++-
> security/smack/smack_lsm.c | 4 +++-
> 4 files changed, 8 insertions(+), 4 deletions(-)
>
> diff --git a/include/linux/lsm_hook_defs.h b/include/linux/lsm_hook_defs.h
> index 4bdddb52a8fe..fdf075a6b1bb 100644
> --- a/include/linux/lsm_hook_defs.h
> +++ b/include/linux/lsm_hook_defs.h
> @@ -134,7 +134,8 @@ LSM_HOOK(int, 0, inode_readlink, struct dentry *dentry)
> LSM_HOOK(int, 0, inode_follow_link, struct dentry *dentry, struct inode *inode,
> bool rcu)
> LSM_HOOK(int, 0, inode_permission, struct inode *inode, int mask)
> -LSM_HOOK(int, 0, inode_setattr, struct dentry *dentry, struct iattr *attr)
> +LSM_HOOK(int, 0, inode_setattr, struct mnt_idmap *idmap, struct dentry *dentry,
> + struct iattr *attr)
LSM_HOOK(int, 0, inode_setattr, struct mnt_idmap *idmap, struct dentry *dentry, struct iattr *attr)
Only 99 characters, i.e. breaking into two lines is not necessary.
> LSM_HOOK(int, 0, inode_getattr, const struct path *path)
> LSM_HOOK(int, 0, inode_setxattr, struct mnt_idmap *idmap,
> struct dentry *dentry, const char *name, const void *value,
> diff --git a/security/security.c b/security/security.c
> index cb6242feb968..2b24d01cf181 100644
> --- a/security/security.c
> +++ b/security/security.c
> @@ -2117,7 +2117,7 @@ int security_inode_setattr(struct mnt_idmap *idmap,
>
> if (unlikely(IS_PRIVATE(d_backing_inode(dentry))))
> return 0;
> - ret = call_int_hook(inode_setattr, 0, dentry, attr);
> + ret = call_int_hook(inode_setattr, 0, idmap, dentry, attr);
> if (ret)
> return ret;
> return evm_inode_setattr(idmap, dentry, attr);
> diff --git a/security/selinux/hooks.c b/security/selinux/hooks.c
> index ee7c49c2cfd3..bfcc4d9aa5ab 100644
> --- a/security/selinux/hooks.c
> +++ b/security/selinux/hooks.c
> @@ -3075,7 +3075,8 @@ static int selinux_inode_permission(struct inode *inode, int mask)
> return rc;
> }
>
> -static int selinux_inode_setattr(struct dentry *dentry, struct iattr *iattr)
> +static int selinux_inode_setattr(struct mnt_idmap *idmap, struct dentry *dentry,
> + struct iattr *iattr)
> {
> const struct cred *cred = current_cred();
> struct inode *inode = d_backing_inode(dentry);
> diff --git a/security/smack/smack_lsm.c b/security/smack/smack_lsm.c
> index 679156601a10..89f2669d50a9 100644
> --- a/security/smack/smack_lsm.c
> +++ b/security/smack/smack_lsm.c
> @@ -1181,12 +1181,14 @@ static int smack_inode_permission(struct inode *inode, int mask)
>
> /**
> * smack_inode_setattr - Smack check for setting attributes
> + * @idmap: idmap of the mount
> * @dentry: the object
> * @iattr: for the force flag
> *
> * Returns 0 if access is permitted, an error code otherwise
> */
> -static int smack_inode_setattr(struct dentry *dentry, struct iattr *iattr)
> +static int smack_inode_setattr(struct mnt_idmap *idmap, struct dentry *dentry,
> + struct iattr *iattr)
static int smack_inode_setattr(struct mnt_idmap *idmap, struct dentry *dentry, struct iattr *iattr)
Can be still in a single line (100 characters exactly).
> {
> struct smk_audit_info ad;
> int rc;
> --
> 2.34.1
BR, Jarkko
