Re: LRO Kernel Panic on Hyper-V VM

From: Michael Tuexen <tuexen_at_FreeBSD.org>
Date: Wed, 15 Apr 2026 20:37:08 UTC
> On 15. Apr 2026, at 22:12, Michael Tuexen <tuexen@freebsd.org> wrote:
> 
>> 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
The fix has been committed:
https://cgit.FreeBSD.org/src/commit/?id=2d13620c6e1be7f8136095f648a6b824158d0941 <https://cgit.freebsd.org/src/commit/?id=2d13620c6e1be7f8136095f648a6b824158d0941>

Thanks for reporting the issue!

Best regards
Michael
> 
> 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
> 
>