kasan: improve vmalloc tests

Update the existing vmalloc_oob() test to account for the specifics of the
tag-based modes.  Also add a few new checks and comments.

Add new vmalloc-related tests:

 - vmalloc_helpers_tags() to check that exported vmalloc helpers can
   handle tagged pointers.

 - vmap_tags() to check that SW_TAGS mode properly tags vmap() mappings.

 - vm_map_ram_tags() to check that SW_TAGS mode properly tags
   vm_map_ram() mappings.

 - vmalloc_percpu() to check that SW_TAGS mode tags regions allocated
   for __alloc_percpu(). The tagging of per-cpu mappings is best-effort;
   proper tagging is tracked in [1].

[1] https://bugzilla.kernel.org/show_bug.cgi?id=215019

[[email protected]: similar to "kasan: test: fix compatibility with FORTIFY_SOURCE"]
  Link: https://lkml.kernel.org/r/[email protected]
  Link: https://lkml.kernel.org/r/865c91ba49b90623ab50c7526b79ccb955f544f0.1644950160.git.andreyknvl@google.com
[[email protected]: set_memory_rw/ro() are not exported to modules]
  Link: https://lkml.kernel.org/r/019ac41602e0c4a7dfe96dc8158a95097c2b2ebd.1645554036.git.andreyknvl@google.com
[[email protected]: fix build]

Cc: Andrey Konovalov <[email protected]>
[[email protected]: vmap_tags() and vm_map_ram_tags() pass invalid page array size]
Link: https://lkml.kernel.org/r/bbdc1c0501c5275e7f26fdb8e2a7b14a40a9f36b.1643047180.git.andreyknvl@google.com
Signed-off-by: Andrey Konovalov <[email protected]>
Signed-off-by: Stephen Rothwell <[email protected]>
Acked-by: Marco Elver <[email protected]>
Cc: Alexander Potapenko <[email protected]>
Cc: Andrey Ryabinin <[email protected]>
Cc: Catalin Marinas <[email protected]>
Cc: Dmitry Vyukov <[email protected]>
Cc: Evgenii Stepanov <[email protected]>
Cc: Mark Rutland <[email protected]>
Cc: Peter Collingbourne <[email protected]>
Cc: Vincenzo Frascino <[email protected]>
Cc: Will Deacon <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
Signed-off-by: Linus Torvalds <[email protected]>

0 files changed, 0 insertions, 0 deletions