On Thu, 17 Nov 2022, Kees Cook wrote: > With all "silently resizing" callers of ksize() refactored, remove the > logic in ksize() that would allow it to be used to effectively change > the size of an allocation (bypassing __alloc_size hints, etc). Users > wanting this feature need to either use kmalloc_size_roundup() before an > allocation, or use krealloc() directly. > > For kfree_sensitive(), move the unpoisoning logic inline. Replace the > some of the partially open-coded ksize() in __do_krealloc with ksize() > now that it doesn't perform unpoisoning. > > Adjust the KUnit tests to match the new ksize() behavior. > > Cc: Andrey Konovalov <andreyknvl@xxxxxxxxx> > Cc: Christoph Lameter <cl@xxxxxxxxx> > Cc: Pekka Enberg <penberg@xxxxxxxxxx> > Cc: David Rientjes <rientjes@xxxxxxxxxx> > Cc: Joonsoo Kim <iamjoonsoo.kim@xxxxxxx> > Cc: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx> > Cc: Roman Gushchin <roman.gushchin@xxxxxxxxx> > Cc: Hyeonggon Yoo <42.hyeyoo@xxxxxxxxx> > Cc: Andrey Ryabinin <ryabinin.a.a@xxxxxxxxx> > Cc: Alexander Potapenko <glider@xxxxxxxxxx> > Cc: Dmitry Vyukov <dvyukov@xxxxxxxxxx> > Cc: Vincenzo Frascino <vincenzo.frascino@xxxxxxx> > Cc: linux-mm@xxxxxxxxx > Cc: kasan-dev@xxxxxxxxxxxxxxxx > Acked-by: Vlastimil Babka <vbabka@xxxxxxx> > Signed-off-by: Kees Cook <keescook@xxxxxxxxxxxx> Acked-by: David Rientjes <rientjes@xxxxxxxxxx>
