[CRYPTO] api: Require block size to be less than PAGE_SIZE/8
Herbert Xu [Sat, 7 Jan 2006 05:24:15 +0000 (16:24 +1100)]
The cipher code path may allocate up to two blocks of data on the stack.
Therefore we need to place limits on the maximum block size.

Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>

crypto/api.c

index 2715afd..e26156f 100644 (file)
@@ -251,7 +251,7 @@ int crypto_register_alg(struct crypto_alg *alg)
        if (alg->cra_alignmask & alg->cra_blocksize)
                return -EINVAL;
 
-       if (alg->cra_blocksize > PAGE_SIZE)
+       if (alg->cra_blocksize > PAGE_SIZE / 8)
                return -EINVAL;
 
        if (alg->cra_priority < 0)