# Re: New skb extension for use by LSMs (skb "security blob")?

- From: Florian Westphal \<fw@strlen.de\>
- Date: 2019-08-22 20:15:24 
- List: linux-security-module
- Page: https://ratatoskr.run/linux-security-module/2019/08/11145658
- Thread: https://ratatoskr.run/netdev/2019/08/11145560/t.md

```text
Casey Schaufler [ref] wrote:
> Given that the original objection to using a skb extension for a
> security blob was that an extension is dynamic, and that the ubiquitous
> nature of LSM use makes that unreasonable, it would seem that supporting
> the security blob as a basic part if the skb would be the obvious and
> correct solution. If the normal case is that there is an LSM that would
> befit from the native (unextended) support of a blob, it would seem
> that that is the case that should be optimized.

What is this "blob"? i.e., what would you like to add to sk_buff to make
whatever use cases you have in mind work?
```