Eval bug: ggml-vulkan crash with vulkan 1.0 #29871

Name and Version

I'm using ggml (from master, circa v0.25.3) in my own software.

ggml-vulcan requires Vulkan 1.2. To enforce this it calls (indirectly, via some templates) the vkEnumerateInstanceVersion function pointer from the Vulkan implementation and compares it to the constant for Vulkan 1.2.

Unfortunately, vkEnumerateInstanceVersion was only added at Vulkan 1.1 and ggml-vulkan is calling it unconditionally.

I have a CL that add a quick null check before the call. If that function is null then it's Vulkan 1.0 and we can throw an exception, like we do if vkEnumerateInstanceVersion returns Vulkan 1.1.

I encountered this on older Android devices.

Operating systems

Other? (Please let us know in description)

GGML backends

Vulkan

Hardware

Fujitsu F-01L (Android 8.1) in Firebase Test Lab

Models

n/a - this is in library/backend initialization.

Problem description & steps to reproduce

Just initializing the ggml-vulkan backend on a system with an older version of Vulkan.

First Bad Commit

No response

Relevant log output

n/a