void vga_common_init(VGACommonState *s, Object *obj, bool global_vmstate)
{
    int i, j, v, b;

    for(i = 0;i < 256; i++) {
        v = 0;
        for(j = 0; j < 8; j++) {
            v |= ((i >> j) & 1) << (j * 4);
        }
        expand4[i] = v;

        v = 0;
        for(j = 0; j < 4; j++) {
            v |= ((i >> (2 * j)) & 3) << (j * 4);
        }
        expand2[i] = v;
    }
    for(i = 0; i < 16; i++) {
        v = 0;
        for(j = 0; j < 4; j++) {
            b = ((i >> j) & 1);
            v |= b << (2 * j);
            v |= b << (2 * j + 1);
        }
        expand4to8[i] = v;
    }

    s->vram_size_mb = uint_clamp(s->vram_size_mb, 1, 512);
    s->vram_size_mb = pow2ceil(s->vram_size_mb);
    s->vram_size = s->vram_size_mb << 20;

    if (!s->vbe_size) {
        s->vbe_size = s->vram_size;
    }

    s->is_vbe_vmstate = 1;
    memory_region_init_ram(&s->vram, obj, "vga.vram", s->vram_size,
                           &error_fatal);
    vmstate_register_ram(&s->vram, global_vmstate ? NULL : DEVICE(obj));
    xen_register_framebuffer(&s->vram);
    s->vram_ptr = memory_region_get_ram_ptr(&s->vram);
    s->get_bpp = vga_get_bpp;
    s->get_offsets = vga_get_offsets;
    s->get_resolution = vga_get_resolution;
    s->hw_ops = &vga_ops;
    switch (vga_retrace_method) {
    case VGA_RETRACE_DUMB:
        s->retrace = vga_dumb_retrace;
        s->update_retrace_info = vga_dumb_update_retrace_info;
        break;

    case VGA_RETRACE_PRECISE:
        s->retrace = vga_precise_retrace;
        s->update_retrace_info = vga_precise_update_retrace_info;
        break;
    }

    /*
     * Set default fb endian based on target, could probably be turned
     * into a device attribute set by the machine/platform to remove
     * all target endian dependencies from this file.
     */
#ifdef TARGET_WORDS_BIGENDIAN
    s->default_endian_fb = true;
#else
    s->default_endian_fb = false;
#endif
    vga_dirty_log_start(s);
}

The product contains an assert() or similar statement that can be triggered by an attacker, which leads to an application exit or other behavior that is more severe than necessary.