Nvidia driver + Sophos Home crash on Boot -UNEXPECTED_KERNEL_MODE_TRAP (7f)

Gaming and Visualization Technologies General Topics & Other SDKs Drivers - Linux, Windows, MacOS
1

Hi all,

We have a customer running Sophos Home + Nvidia drivers who reports a crash on boot when both products are installed. Despite multiple attempts to reach NVIDIA Support directly and through the affected customer, we haven’t received a response, so we’re hoping someone here can help.

Environment:

  • OS: Windows 10.0.19045

  • Security: Sophos Home 2023.2.2.2

  • GPU: NVIDIA GeForce RTX 3090

Crash:

  • The bugcheck code is UNEXPECTED_KERNEL_MODE_TRAP (7f) - Arg1: 0000000000000008, EXCEPTION_DOUBLE_FAULT
    • This looks to be due to kernel stack exhaustion.
    • The call stack resulting in nt!KeBugCheckEx has 67 frames of the stack used by the module nvlddmkm. This doesn’t seem correct and could be an unexpected code path?
    • The nvlddmkm module is using the vast majority of the kernel stack space available but without symbols it is hard to interpret the reason for the usage.
      • The version of thenvlddmkm driver in question was built on Mon Mar 3 22:15:42 2025 and we have also seen a dump that is very similar with the time stamp Tue Dec 3 20:17:19 2024 so not a new issue it seems.

Request:
Could someone with access to NVIDIA symbols review a memory dump to help us understand the stack usage and what might be triggering this scenario?

Thank you,

Barb S.
Program Manager, Sophos Home Support.

2

Hi @barbara.spampinato,

I took the liberty of moving this post over to the Linux forums where it hopefully gets some attention.

Can you check the pinned posts like »»»»»»»»»» If you have a problem, PLEASE read this first «««««««««« and provide possibly missing details?

Thanks!

3

Hi Markus,

I appreciate the response, but this is not a Linux thread, it is a Windows related problem. We have been trying to get Nvidia Support to reply to us, our devs, our mutual customers, to no avail.
I finally received a response a few days ago, but I’m not sure what will happen next.

We are urgently trying to get our devs in contact with their devs so that they can work the BSOD issue together (our devs need the symbols explanation to continue debugging).

Thank you,

Barb S.

Program Manager, Sophos Home.

4

Moving this back to Drivers - Linux, Windows, MacOS since this isn’t a Linux issue

5

I am so sorry @barbara.spampinato, too many things on my plate and I mixed up your message.

Thanks @tschicke for moving it back.