dm crypt: fix kcryptd_async_done parameter
commitb2174eebd1fadb76454dad09a1dacbc17081e6b0
authorHuang Ying <ying.huang@intel.com>
Mon, 16 Mar 2009 17:44:33 +0000 (16 17:44 +0000)
committerAlasdair G Kergon <agk@redhat.com>
Mon, 16 Mar 2009 17:44:33 +0000 (16 17:44 +0000)
treea53722388ed012d097cf58a29e484957109c0b7b
parentd659e6cc98766a1a61d6bdd283f95d149abd7719
dm crypt: fix kcryptd_async_done parameter

In the async encryption-complete function (kcryptd_async_done), the
crypto_async_request passed in may be different from the one passed to
crypto_ablkcipher_encrypt/decrypt.  Only crypto_async_request->data is
guaranteed to be same as the one passed in.  The current
kcryptd_async_done uses the passed-in crypto_async_request directly
which may cause the AES-NI-based AES algorithm implementation to panic.

This patch fixes this bug by only using crypto_async_request->data,
which points to dm_crypt_request, the crypto_async_request passed in.
The original data (convert_context) is gotten from dm_crypt_request.

[mbroz@redhat.com: reworked]
Cc: stable@kernel.org
Signed-off-by: Huang Ying <ying.huang@intel.com>
Cc: Herbert Xu <herbert@gondor.apana.org.au>
Signed-off-by: Milan Broz <mbroz@redhat.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Alasdair G Kergon <agk@redhat.com>
drivers/md/dm-crypt.c