selinux: implement inode_file_[g|s]etattr hooks

These hooks are called on inode extended attribute retrieval/change.

Cc: selinux@vger.kernel.org
Cc: Paul Moore <paul@paul-moore.com>
Acked-by: Paul Moore <paul@paul-moore.com>
Signed-off-by: Andrey Albershteyn <aalbersh@kernel.org>
Link: https://lore.kernel.org/20250630-xattrat-syscall-v6-3-c4e3bc35227b@kernel.org
Signed-off-by: Christian Brauner <brauner@kernel.org>

diff --git a/security/selinux/hooks.c b/security/selinux/hooks.c
index 595ceb314aeb3ee12a5966792e1cda88b2bdf107..be7aca2269fab5e255acd351ecf79ebb0c465309 100644 (file)
--- a/security/selinux/hooks.c
+++ b/security/selinux/hooks.c
@@ -3480,6 +3480,18 @@ static int selinux_inode_removexattr(struct mnt_idmap *idmap,
        return -EACCES;
 }
 
+static int selinux_inode_file_setattr(struct dentry *dentry,
+                                     struct fileattr *fa)
+{
+       return dentry_has_perm(current_cred(), dentry, FILE__SETATTR);
+}
+
+static int selinux_inode_file_getattr(struct dentry *dentry,
+                                     struct fileattr *fa)
+{
+       return dentry_has_perm(current_cred(), dentry, FILE__GETATTR);
+}
+
 static int selinux_path_notify(const struct path *path, u64 mask,
                                                unsigned int obj_type)
 {
@@ -7350,6 +7362,8 @@ static struct security_hook_list selinux_hooks[] __ro_after_init = {
        LSM_HOOK_INIT(inode_getxattr, selinux_inode_getxattr),
        LSM_HOOK_INIT(inode_listxattr, selinux_inode_listxattr),
        LSM_HOOK_INIT(inode_removexattr, selinux_inode_removexattr),
+       LSM_HOOK_INIT(inode_file_getattr, selinux_inode_file_getattr),
+       LSM_HOOK_INIT(inode_file_setattr, selinux_inode_file_setattr),
        LSM_HOOK_INIT(inode_set_acl, selinux_inode_set_acl),
        LSM_HOOK_INIT(inode_get_acl, selinux_inode_get_acl),
        LSM_HOOK_INIT(inode_remove_acl, selinux_inode_remove_acl),