crypto: api - Include alignment in crypto_alg_extsize
This patch ensures that the tfm context always has enough extra
memory to ensure that it is aligned according to cra_alignment.
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
diff --git a/crypto/algapi.c b/crypto/algapi.c
index abf100c..3c079b7 100644
--- a/crypto/algapi.c
+++ b/crypto/algapi.c
@@ -980,7 +980,8 @@
unsigned int crypto_alg_extsize(struct crypto_alg *alg)
{
- return alg->cra_ctxsize;
+ return alg->cra_ctxsize +
+ (alg->cra_alignmask & ~(crypto_tfm_ctx_alignment() - 1));
}
EXPORT_SYMBOL_GPL(crypto_alg_extsize);