[PATCH 0/3] Assorted improvements to usercopy

We must prohibit page boundary crossing for kmap() addresses.
vmap() addresses are limited by the length of the mapping, and
compound pages are limited by the size of the page.

These should probably all have test cases?

Matthew Wilcox (Oracle) (3):
  mm/usercopy: Check kmap addresses properly
  mm/usercopy: Detect vmalloc overruns
  mm/usercopy: Detect compound page overruns

 arch/x86/include/asm/highmem.h   |  1 +
 include/linux/highmem-internal.h | 10 ++++++++++
 mm/usercopy.c                    | 33 +++++++++++++++++++++-----------
 3 files changed, 33 insertions(+), 11 deletions(-)

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2.32.0