Herbert Xu
2148e9ab0c
crypto: authencesn - Fix digest_null crash
...
commit 41cdf7a45389e01991ee31e3301ed83cb3e3f7dc upstream.
When authencesn is used together with digest_null a crash will
occur on the decrypt path. This is because normally we perform
a special setup to preserve the ESN, but this is skipped if there
is no authentication. However, on the post-authentication path
it always expects the preservation to be in place, thus causing
a crash when digest_null is used.
This patch fixes this by also skipping the post-processing when
there is no authentication.
Fixes: 104880a6b4 ("crypto: authencesn - Convert to new AEAD...")
Reported-by: Jan Tluka <jtluka@redhat.com >
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au >
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org >
2017-08-06 19:19:39 -07:00
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