crypto: arm-aes - fix encryption of unaligned data

Fix the same alignment bug as in arm64 - we need to pass residue
unprocessed bytes as the last argument to blkcipher_walk_done.

Signed-off-by: Mikulas Patocka <mpatocka@redhat.com>
Cc: stable@vger.kernel.org	# 3.13+
Acked-by: Ard Biesheuvel <ard.biesheuvel@linaro.org>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>

diff --git a/arch/arm/crypto/aesbs-glue.c b/arch/arm/crypto/aesbs-glue.c
index 4522366..15468fb 100644 (file)
--- a/arch/arm/crypto/aesbs-glue.c
+++ b/arch/arm/crypto/aesbs-glue.c
@@ -137,7 +137,7 @@ static int aesbs_cbc_encrypt(struct blkcipher_desc *desc,
                                dst += AES_BLOCK_SIZE;
                        } while (--blocks);
                }
-               err = blkcipher_walk_done(desc, &walk, 0);
+               err = blkcipher_walk_done(desc, &walk, walk.nbytes % AES_BLOCK_SIZE);
        }
        return err;
 }
@@ -158,7 +158,7 @@ static int aesbs_cbc_decrypt(struct blkcipher_desc *desc,
                bsaes_cbc_encrypt(walk.src.virt.addr, walk.dst.virt.addr,
                                  walk.nbytes, &ctx->dec, walk.iv);
                kernel_neon_end();
-               err = blkcipher_walk_done(desc, &walk, 0);
+               err = blkcipher_walk_done(desc, &walk, walk.nbytes % AES_BLOCK_SIZE);
        }
        while (walk.nbytes) {
                u32 blocks = walk.nbytes / AES_BLOCK_SIZE;
@@ -182,7 +182,7 @@ static int aesbs_cbc_decrypt(struct blkcipher_desc *desc,
                        dst += AES_BLOCK_SIZE;
                        src += AES_BLOCK_SIZE;
                } while (--blocks);
-               err = blkcipher_walk_done(desc, &walk, 0);
+               err = blkcipher_walk_done(desc, &walk, walk.nbytes % AES_BLOCK_SIZE);
        }
        return err;
 }
@@ -268,7 +268,7 @@ static int aesbs_xts_encrypt(struct blkcipher_desc *desc,
                bsaes_xts_encrypt(walk.src.virt.addr, walk.dst.virt.addr,
                                  walk.nbytes, &ctx->enc, walk.iv);
                kernel_neon_end();
-               err = blkcipher_walk_done(desc, &walk, 0);
+               err = blkcipher_walk_done(desc, &walk, walk.nbytes % AES_BLOCK_SIZE);
        }
        return err;
 }
@@ -292,7 +292,7 @@ static int aesbs_xts_decrypt(struct blkcipher_desc *desc,
                bsaes_xts_decrypt(walk.src.virt.addr, walk.dst.virt.addr,
                                  walk.nbytes, &ctx->dec, walk.iv);
                kernel_neon_end();
-               err = blkcipher_walk_done(desc, &walk, 0);
+               err = blkcipher_walk_done(desc, &walk, walk.nbytes % AES_BLOCK_SIZE);
        }
        return err;
 }