mm/highmem: VM_BUG_ON() if offset + len > PAGE_SIZE

Add VM_BUG_ON() bounds checking to make sure that, if "offset + len>
PAGE_SIZE", memset() does not corrupt data in adjacent pages.

Mainly to match all the similar functions in highmem.h.

Link: https://lkml.kernel.org/r/[email protected]
Signed-off-by: Fabio M. De Francesco <[email protected]>
Reviewed-by: Andrew Morton <[email protected]>
Cc: Ira Weiny <[email protected]>
Cc: Catalin Marinas <[email protected]>
Cc: "Matthew Wilcox (Oracle)" <[email protected]>
Cc: Peter Collingbourne <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>

0 files changed, 0 insertions, 0 deletions