[LSF/MM TOPIC] Protectable Dynamically allocated Memory for both kernel and userspace

Igor Stoppa igor.stoppa at huawei.com
Tue Jan 30 13:57:58 UTC 2018


At the LSF/MM summit, I would like to discuss the following topics:

- Dynamic allocation of protectable (read/only) memory in kernel space
- Rare Write option for the aforementioned dynamic allocation
  (this is most likely related to Kees Cook's rare-write proposal)
- Support for userspace to mprotect selected pages:
   * as permanently R/O
   * as rare write
    (this might be easier to implement than kernel rare-write)
   Probably both of these will also require a separate userspace memory
   allocator, which understands pools, or at the very least, can support
   different types of pages.
- Optimization of vmalloc (combining vmap_area and vm_struct structures)

igor stoppa

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