On Mon, Apr 28, 2025 at 04:28:17PM +0100, Lorenzo Stoakes wrote: > Right now these are performed in kernel/fork.c which is odd and a violation > of separation of concerns, as well as preventing us from integrating this > and related logic into userland VMA testing going forward, and perhaps more > importantly - enabling us to, in a subsequent commit, make VMA > allocation/freeing a purely internal mm operation. > > There is a fly in the ointment - nommu - mmap.c is not compiled if > CONFIG_MMU not set, and neither is vma.c. > > To square the circle, let's add a new file - vma_init.c. This will be > compiled for both CONFIG_MMU and nommu builds, and will also form part of > the VMA userland testing. > > This allows us to de-duplicate code, while maintaining separation of > concerns and the ability for us to userland test this logic. > > Update the VMA userland tests accordingly, additionally adding a > detach_free_vma() helper function to correctly detach VMAs before freeing > them in test code, as this change was triggering the assert for this. > > Signed-off-by: Lorenzo Stoakes <lorenzo.stoakes@xxxxxxxxxx> Reviewed-by: Kees Cook <kees@xxxxxxxxxx> -- Kees Cook
