On Mon, 2025-09-08 at 10:53 -0400, Mimi Zohar wrote: > Hi Coiby, > > On Mon, 2025-09-08 at 19:12 +0800, Coiby Xu wrote: > > > > > > Even without an IMA appraise policy, the security xattrs are written out > > > to the > > > filesystem, but the IMA_DIGSIG flag is not cached. > > > > It seems I miss some context for the above sentence. If no IMA policy is > > configured, no ima_iint_cache will be created. If you mean non-appraisal > > policy, will not caching IMA_DIGSIG flag cause any problem? > > Sorry. What I was trying to say is that your test program illustrates the > problem both with or without any of the boot command line options as you > suggested - "ima_appraise=fix evm=fix ima_policy=appraise_tcb". Writing some > other security xattr is a generic problem, whether the file is in policy or > not, > whether IMA or EVM are in fix mode or not. The rpm-plugin-ima should install > the IMA signature regardless.
My mistake. An appraise policy indeed needs to be defined for the file signature to be replaced with a file hash. > > SELinux doesn't usually re-write the security.selinux xattr, so the problem is > hard to reproduce after installing the rpm-plugin-ima with "dnf reinstall > <package>". > > thanks, > > Mimi >
