[PATCH] evm: Correct inode_init_security hooks behaviors

[Mimi Zohar]

On Tue, 2022-10-25 at 15:33 +0200, Nicolas Bouchinet wrote:
> > Agreed, independently as to whether BPF defines a security xattr, if
> > two LSMs initialize security xattrs, then this change is needed.  Are
> > there any other examples?
> 
> I think that in its current state the kernel cannot load two LSM capable of xattr
> initialization as they are all defined with the `LSM_FLAG_EXCLUSIVE` flag set.
> But I may be unaware of other LSM in development stage.

Casey, Paul, can we get confirmation on this?

> > 
> > (nit: I understand the line size has generally been relaxed, but for
> > IMA/EVM I would prefer it to be remain as 80 chars.)
> > 
> 
> No problem, will change it !
> 
> I'll take time to run few tests with BPF and send a patch v3 with new changes.

Since Roberto's patches will address the BPF bug(s), is this a fix for
a real bug or a possbile future one.   Cc'ing stable might not be
necessary.

thanks,

Mimi