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 <[email protected]>
sfionov · Jun 3, 2015 · c2110f2 · c2110f2
1 parent 5c98d62
commit c2110f2
Showing 1 changed file with 2 additions and 1 deletion.
diff --git a/crypto/algapi.c b/crypto/algapi.c
@@ -980,7 +980,8 @@ EXPORT_SYMBOL_GPL(crypto_xor);
 
 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);