diff options
| author | Steffen Klassert <steffen.klassert@secunet.com> | 2009-08-20 17:58:04 +1000 |
|---|---|---|
| committer | Herbert Xu <herbert@gondor.apana.org.au> | 2009-08-20 17:58:04 +1000 |
| commit | 36f87a4a29cb8cd291169483079fde34bad4ef16 (patch) | |
| tree | eba5175548616ee5f35679cb6491f58dc4849c63 /crypto | |
| parent | 4e4ed83be6a64c8c9fe69c77f37a26bb62ed21f7 (diff) | |
| download | lwn-36f87a4a29cb8cd291169483079fde34bad4ef16.tar.gz lwn-36f87a4a29cb8cd291169483079fde34bad4ef16.zip | |
crypto: xcbc - Fix alignment calculation of xcbc_tfm_ctx
The alignment calculation of xcbc_tfm_ctx uses alg->cra_alignmask
and not alg->cra_alignmask + 1 as it should. This led to frequent
crashes during the selftest of xcbc(aes-asm) on x86_64
machines. This patch fixes this. Also we use the alignmask
of xcbc and not the alignmask of the underlying algorithm
for the alignmnent calculation in xcbc_create now.
Signed-off-by: Steffen Klassert <steffen.klassert@secunet.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Diffstat (limited to 'crypto')
| -rw-r--r-- | crypto/xcbc.c | 8 |
1 files changed, 5 insertions, 3 deletions
diff --git a/crypto/xcbc.c b/crypto/xcbc.c index 1e30b31f33c6..bb7b67fba349 100644 --- a/crypto/xcbc.c +++ b/crypto/xcbc.c @@ -199,6 +199,7 @@ static int xcbc_create(struct crypto_template *tmpl, struct rtattr **tb) { struct shash_instance *inst; struct crypto_alg *alg; + unsigned long alignmask; int err; err = crypto_check_attr_type(tb, CRYPTO_ALG_TYPE_SHASH); @@ -228,19 +229,20 @@ static int xcbc_create(struct crypto_template *tmpl, struct rtattr **tb) if (err) goto out_free_inst; + alignmask = alg->cra_alignmask | 3; + inst->alg.base.cra_alignmask = alignmask; inst->alg.base.cra_priority = alg->cra_priority; inst->alg.base.cra_blocksize = alg->cra_blocksize; - inst->alg.base.cra_alignmask = alg->cra_alignmask | 3; inst->alg.digestsize = alg->cra_blocksize; inst->alg.descsize = ALIGN(sizeof(struct xcbc_desc_ctx), crypto_tfm_ctx_alignment()) + - (alg->cra_alignmask & + (alignmask & ~(crypto_tfm_ctx_alignment() - 1)) + alg->cra_blocksize * 2; inst->alg.base.cra_ctxsize = ALIGN(sizeof(struct xcbc_tfm_ctx), - alg->cra_alignmask) + + alignmask + 1) + alg->cra_blocksize * 2; inst->alg.base.cra_init = xcbc_init_tfm; inst->alg.base.cra_exit = xcbc_exit_tfm; |