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authorEric Biggers <ebiggers@google.com>2023-10-27 13:30:17 -0700
committerHerbert Xu <herbert@gondor.apana.org.au>2023-11-01 12:58:42 +0800
commita312e07a65fb598ed239b940434392721385c722 (patch)
tree1626dbe670d719e911f330a16d06ca869aa2750c /security/keys
parentb030c45844cfe0d4c89202cd6c9f4697b3a25a6a (diff)
crypto: adiantum - flush destination page before unmapping
Upon additional review, the new fast path in adiantum_finish() is missing the call to flush_dcache_page() that scatterwalk_map_and_copy() was doing. It's apparently debatable whether flush_dcache_page() is actually needed, as per the discussion at https://lore.kernel.org/lkml/YYP1lAq46NWzhOf0@casper.infradead.org/T/#u. However, it appears that currently all the helper functions that write to a page, such as scatterwalk_map_and_copy(), memcpy_to_page(), and memzero_page(), do the dcache flush. So do it to be consistent. Fixes: dadf5e56c967 ("crypto: adiantum - add fast path for single-page messages") Signed-off-by: Eric Biggers <ebiggers@google.com> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
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