[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>
diff --git a/crypto/blkcipher.c b/crypto/blkcipher.c
index a3c87da..3d05586 100644
--- a/crypto/blkcipher.c
+++ b/crypto/blkcipher.c
@@ -158,7 +158,7 @@
 	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)