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| author | Eric Biggers <ebiggers@google.com> | 2019-01-31 23:51:40 -0800 |
|---|---|---|
| committer | Herbert Xu <herbert@gondor.apana.org.au> | 2019-02-08 15:30:08 +0800 |
| commit | 3af349639597fea582a93604734d717e59a0e223 (patch) | |
| tree | e14fbe662623df11569aa43b5a3db8b80e89b678 /crypto | |
| parent | 2060e284e9595fc3baed6e035903c05b93266555 (diff) | |
crypto: x86/aesni-gcm - fix crash on empty plaintext
gcmaes_crypt_by_sg() dereferences the NULL pointer returned by
scatterwalk_ffwd() when encrypting an empty plaintext and the source
scatterlist ends immediately after the associated data.
Fix it by only fast-forwarding to the src/dst data scatterlists if the
data length is nonzero.
This bug is reproduced by the "rfc4543(gcm(aes))" test vectors when run
with the new AEAD test manager.
Fixes: e845520707f8 ("crypto: aesni - Update aesni-intel_glue to use scatter/gather")
Cc: <stable@vger.kernel.org> # v4.17+
Cc: Dave Watson <davejwatson@fb.com>
Signed-off-by: Eric Biggers <ebiggers@google.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Diffstat (limited to 'crypto')
0 files changed, 0 insertions, 0 deletions