On Jan 15, 2024 Roberto Sassu <roberto.sassu@xxxxxxxxxxxxxxx> 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@xxxxxxxxxx> > Reviewed-by: Stefan Berger <stefanb@xxxxxxxxxxxxx> > Acked-by: Casey Schaufler <casey@xxxxxxxxxxxxxxxx> > Reviewed-by: Mimi Zohar <zohar@xxxxxxxxxxxxx> > --- > 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@xxxxxxxxxxxxxx> -- paul-moore.com
