In the Linux kernel, the following vulnerability has been resolved:

drm/vboxvideo: Replace fake VLA at end of vbva_mouse_pointer_shape with real VLA

Replace the fake VLA at end of the vbva_mouse_pointer_shape shape with
a real VLA to fix a "memcpy: detected field-spanning write error" warning:

[   13.319813] memcpy: detected field-spanning write (size 16896) of single field "p->data" at drivers/gpu/drm/vboxvideo/hgsmi_base.c:154 (size 4)
[   13.319841] WARNING: CPU: 0 PID: 1105 at drivers/gpu/drm/vboxvideo/hgsmi_base.c:154 hgsmi_update_pointer_shape+0x192/0x1c0 [vboxvideo]
[   13.320038] Call Trace:
[   13.320173]  hgsmi_update_pointer_shape [vboxvideo]
[   13.320184]  vbox_cursor_atomic_update [vboxvideo]

Note as mentioned in the added comment it seems the original length
calculation for the allocated and send hgsmi buffer is 4 bytes too large.
Changing this is not the goal of this patch, so this behavior is kept.

kernel.org https://git.kernel.org/stable/c/34a422274b693507025a7db21519865d1862afcb [No types assigned]

kernel.org https://git.kernel.org/stable/c/7458a6cdaebb3dc59af8578ee354fae78a154c4a [No types assigned]

kernel.org https://git.kernel.org/stable/c/9eb32bd23bbcec44bcbef27b7f282b7a7f3d0391 [No types assigned]

kernel.org https://git.kernel.org/stable/c/d92b90f9a54d9300a6e883258e79f36dab53bfae [No types assigned]

kernel.org https://git.kernel.org/stable/c/fae9dc12c61ce23cf29d09824a741b7b1ff8f01f [No types assigned]