[PATCH bpf-next 0/5] Fix kernel panic caused by bpf lsm return value

[Roberto Sassu]

On Mon, 2024-03-18 at 09:52 -0700, Stanislav Fomichev wrote:
> On 03/16, Xu Kuohai wrote:
> > From: Xu Kuohai <xukuohai at huawei.com>
> > 
> > A bpf prog returning positive number attached to file_alloc_security hook
> > will make kernel panic.
> 
> I'll leave it up to KP. I remember there was a similar patch series in
> the past, but I have no state on why it was not accepted..

Yes, this one:

v1: https://lore.kernel.org/bpf/20221115175652.3836811-1-roberto.sassu@huaweicloud.com/
v2: https://lore.kernel.org/bpf/20221207172434.435893-1-roberto.sassu@huaweicloud.com/

The selftests were failing, and I wasn't able to come up with a
solution on the verifier side. I see patch 5 goes in that direction,
and I remember there was related work in this area.

(just saw Paul's answer, maybe the new KP's patch set also solves this)

Roberto