On 3/19/2024 1:02 AM, Roberto Sassu wrote:
On Mon, 2024-03-18 at 09:52 -0700, Stanislav Fomichev wrote:
On 03/16, Xu Kuohai wrote:
From: Xu Kuohai <xukuohai@xxxxxxxxxx>
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@xxxxxxxxxxxxxxx/
v2: https://lore.kernel.org/bpf/20221207172434.435893-1-roberto.sassu@xxxxxxxxxxxxxxx/
Hmm, these two series do address the same problem. Now I'm pretty
sure I read your series last year, at least some of the patches,
but I didn't think of it when I ran into this panic issue last
week. Maybe it's because I does not fully understand it.
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
