[CRYPTO] blkcipher: Increase kmalloc amount to aligned block size

Now that the block size is no longer a multiple of the alignment, we need to
increase the kmalloc amount in blkcipher_next_slow to use the aligned block
size.
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>

crypto/blkcipher.c

@@ -158,7 +158,7 @@ static inline int blkcipher_next_slow(struct blkcipher_desc *desc,
 	if (walk->buffer)
 		goto ok;
 
-	n = bsize * 3 - (alignmask + 1) +
+	n = aligned_bsize * 3 - (alignmask + 1) +
 	    (alignmask & ~(crypto_tfm_ctx_alignment() - 1));
 	walk->buffer = kmalloc(n, GFP_ATOMIC);
 	if (!walk->buffer)