mm/usercopy: Detect large folio overruns

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Move the compound page overrun detection out of
CONFIG_HARDENED_USERCOPY_PAGESPAN and convert it to use folios so it's
enabled for more people.

Signed-off-by: Matthew Wilcox (Oracle) <willy@infradead.org>
Acked-by: Kees Cook <keescook@chromium.org>
Reviewed-by: David Hildenbrand <david@redhat.com>
Signed-off-by: Kees Cook <keescook@chromium.org>
Link: https://lore.kernel.org/r/20220110231530.665970-4-willy@infradead.org

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Matthew Wilcox (Oracle) 2022-01-10 23:15:29 +00:00 • committed by Kees Cook

parent 0aef499f31

commit ab502103ae

1 changed files with 4 additions and 6 deletions

Show all changes Ignore whitespace when comparing lines Ignore changes in amount of whitespace Ignore changes in whitespace at EOL

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mm/usercopy.c

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