Re: LRO Kernel Panic on Hyper-V VM

From: Michael Tuexen <tuexen_at_FreeBSD.org>
Date: Wed, 15 Apr 2026 20:12:27 UTC
> On 15. Apr 2026, at 21:32, Shawn Webb <shawn.webb@hardenedbsd.org> wrote:
> 
> Hey all,
> 
> I've updated one of my Hyper-V VMs earlier today against an up-to-date
> source tree. I've noticed quite a few networking-related changes in
> FreeBSD on 16-CURRENT and I suspect (at least) one of those changes is
> problematic.
> 
> I'm not at all well-versed in the networking code, so I'm unsure
> what's going on.
> 
> I've uploaded a core.txt dump:
> https://hardenedbsd.org/~shawn/2026-04-15_lro-panic-r01.txt
Thanks. The problem is that the vnet is not set correctly.

This should fix it:
https://reviews.freebsd.org/D56420

Best regards
Michael
> 
> Thanks,
> 
> -- 
> Shawn Webb
> Cofounder / Security Engineer
> HardenedBSD
> 
> Signal Username:  shawn_webb.74
> Tor-ified Signal: +1 303-901-1600 / shawn_webb_opsec.50
> https://git.hardenedbsd.org/hardenedbsd/pubkeys/-/raw/master/Shawn_Webb/03A4CBEBB82EA5A67D9F3853FF2E67A277F8E1FA.pub.asc