On Mon, Dec 20, 2021 at 11:02 PM <andrey.konovalov@xxxxxxxxx> wrote: > > From: Andrey Konovalov <andreyknvl@xxxxxxxxxx> > > Make KASAN unpoison vmalloc mappings after they have been mapped in > when it's possible: for vmalloc() (indentified via VM_ALLOC) and > vm_map_ram(). > > The reasons for this are: > > - For vmalloc() and vm_map_ram(): pages don't get unpoisoned in case > mapping them fails. > - For vmalloc(): HW_TAGS KASAN needs pages to be mapped to set tags via > kasan_unpoison_vmalloc(). > > As a part of these changes, the return value of __vmalloc_node_range() > is changed to area->addr. This is a non-functional change, as > __vmalloc_area_node() returns area->addr anyway. > > Signed-off-by: Andrey Konovalov <andreyknvl@xxxxxxxxxx> Reviewed-by: Alexander Potapenko <glider@xxxxxxxxxx>
