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System information

• OS: openSUSE Tumbleweed
• GPU: llvmpipe (LLVM 13.0.0, 256 bits)
• Kernel version: 5.15.12-1-default
• Mesa version: 21.3.3 + main

Describe the issue

Running wine with llvmpipe (LIBGL_ALWAYS_SOFTWARE=1 wine ...) causes Wine to segfault.

In Wine, this can be worked around by MESA_EXTENSION_OVERRIDE="-GL_EXT_memory_object", as it avoids the call to glGetUnsignedBytevEXT(GL_DRIVER_UUID_EXT, dr_uuid)/glGetUnsignedBytei_vEXT(GL_DEVICE_UUID_EXT, 0, dev_uuid).

Regression

Caused by !12345 (diffs)

Trivial reproducer:

#define GL_GLEXT_PROTOTYPES 1

#include <SDL2/SDL.h>
#include <SDL2/SDL_video.h>
#include <GL/gl.h>
#include <GL/glext.h>
#include <stdio.h>

int main(int argc, char* argv[])
{
    GLint count = 0;
    GLubyte driver_uuid[16];
    GLubyte device_uuid[16];

    SDL_Window *window = SDL_CreateWindow(
        "SDL2/OpenGL Demo", 0, 0, 640, 480,
        SDL_WINDOW_OPENGL|SDL_WINDOW_RESIZABLE);
    SDL_GLContext glcontext = SDL_GL_CreateContext(window);

    glGetIntegerv(GL_NUM_DEVICE_UUIDS_EXT, &count);
    if (count) {
        glGetUnsignedBytevEXT(GL_DRIVER_UUID_EXT, driver_uuid);
        glGetUnsignedBytei_vEXT(GL_DEVICE_UUID_EXT, 0, device_uuid);
    }
}

Compile with g++ -o ./test_gl_ext_memory_obj ./test_gl_ext_memory_obj.c -lGL -lSDL2