Re: [PATCH v2 1/3] kasan: support backing vmalloc space with real shadow memory

Daniel Axtens writes: > Hi Mark, > > Thanks for your email - I'm very new to mm stuff and the feedback is > very helpful. > >>> +#ifndef CONFIG_KASAN_VMALLOC >>> int kasan_module_alloc(void *addr, size_t size) >>> { >>> void *ret; >>> @@ -603,6 +604,7 @@ void kasan_free_shadow(const struct

Re: [PATCH v2 1/3] kasan: support backing vmalloc space with real shadow memory

Hi Mark, Thanks for your email - I'm very new to mm stuff and the feedback is very helpful. >> +#ifndef CONFIG_KASAN_VMALLOC >> int kasan_module_alloc(void *addr, size_t size) >> { >> void *ret; >> @@ -603,6 +604,7 @@ void kasan_free_shadow(const struct vm_struct *vm) >> if

Re: [PATCH v2 1/3] kasan: support backing vmalloc space with real shadow memory

Hi Daniel, On Tue, Jul 30, 2019 at 12:21:06AM +1000, Daniel Axtens wrote: > Hook into vmalloc and vmap, and dynamically allocate real shadow > memory to back the mappings. > > Most mappings in vmalloc space are small, requiring less than a full > page of shadow space. Allocating a full shadow

[PATCH v2 1/3] kasan: support backing vmalloc space with real shadow memory

Hook into vmalloc and vmap, and dynamically allocate real shadow memory to back the mappings. Most mappings in vmalloc space are small, requiring less than a full page of shadow space. Allocating a full shadow page per mapping would therefore be wasteful. Furthermore, to ensure that different