Thread (12 messages) 12 messages, 5 authors, 2024-12-12

Re: [PATCH v3 bpf-next 0/6] Enable writing xattr from BPF programs

From: "Theodore Ts'o" <tytso@mit.edu>
Date: 2024-12-11 13:19:00
Also in: bpf, linux-fsdevel, lkml

On Tue, Dec 10, 2024 at 02:06:21PM -0800, Song Liu wrote:
Add support to set and remove xattr from BPF program. Also add
security.bpf. xattr name prefix.
If the system allows for the execution of unprivileged BPF programs
(e.g., ones where a random user can load their own BPF programs), will
they have hte ability to set and remove security.bpf.* xattrs?  If the
answer is yes, should this be disallowed?

I note that one of the use cases seems to be BPF-based LSM's, so we
may want to have something even more restrictive since otherwise any
BPF program could potentially have the same power as the LSM?

    	    	  	      	       	    - Ted
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