Re: [PATCH] pnfs/blocklayout: reject zero chunk_size and volumes_count in GETDEVICEINFO

[Trond Myklebust <trondmy@kernel.org>]

On Tue, 2026-07-14 at 10:41 -0400, Michael Bommarito wrote:
> On Tue, Jul 14, 2026 at 10:37 AM Trond Myklebust <trondmy@kernel.org>
> wrote:
> > NACK to this, and all further patches with the words "malicious
> > server"
> > as their justification. It's time to stop this incessant flood of
> > worthless AI slop...
> 
> Sure, I hear you.  I'll make a note to skip your subsystem going
> forward.
> 
> FWIW though, these are often exacty the networks where ARP spoofing
> still works and malicious server can be read to mean "anyone who can
> pretend to be a server/peer" for the relevant packet/session.
> 
> Thanks,
> Mike

Then seeing this is a great opportunity to discover that you have an
insecure network, and that you should have been using either krb5i,
krb5p, TLS or secure VLAN technology to protect your on-the-wire
message protocols against precisely this kind of man-in-the-middle
attack.

Again, though, a savvy man-in-the-middle won't be trying to cause
clients to crash when they have a golden opportunity to manipulate the
stored data instead.

-- 
Trond Myklebust
Linux NFS client maintainer, Hammerspace
trondmy@kernel.org, trond.myklebust@hammerspace.com