On Mon, Jan 15, 2024 at 07:17:55PM +0100, Roberto Sassu wrote: > From: Roberto Sassu <roberto.sassu@xxxxxxxxxx> > > In preparation for moving IMA and EVM to the LSM infrastructure, introduce > the inode_post_removexattr hook. > > At inode_removexattr hook, EVM verifies the file's existing HMAC value. At > inode_post_removexattr, EVM re-calculates the file's HMAC with the passed > xattr removed and other file metadata. > > Other LSMs could similarly take some action after successful xattr removal. > > The new hook cannot return an error and cannot cause the operation to be > reverted. > > Signed-off-by: Roberto Sassu <roberto.sassu@xxxxxxxxxx> > Reviewed-by: Stefan Berger <stefanb@xxxxxxxxxxxxx> > Reviewed-by: Mimi Zohar <zohar@xxxxxxxxxxxxx> > Reviewed-by: Casey Schaufler <casey@xxxxxxxxxxxxxxxx> > --- > fs/xattr.c | 9 +++++---- Acked-by: Christian Brauner <brauner@xxxxxxxxxx>
