From: Mikulas Patocka <mpatocka@redhat.com>
Date: Fri, 25 Jul 2014 23:40:20 +0000 (-0400)
Subject: crypto: arm64-aes - fix encryption of unaligned data
X-Git-Tag: omap-for-v3.17/fixes-against-rc2~219^2~1
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=f960d2093f29f0bc4e1df1fcefb993455620c0b5;p=pandora-kernel.git

crypto: arm64-aes - fix encryption of unaligned data

cryptsetup fails on arm64 when using kernel encryption via AF_ALG socket.
See https://bugzilla.redhat.com/show_bug.cgi?id=1122937

The bug is caused by incorrect handling of unaligned data in
arch/arm64/crypto/aes-glue.c. Cryptsetup creates a buffer that is aligned
on 8 bytes, but not on 16 bytes. It opens AF_ALG socket and uses the
socket to encrypt data in the buffer. The arm64 crypto accelerator causes
data corruption or crashes in the scatterwalk_pagedone.

This patch fixes the bug by passing the residue bytes that were not
processed as the last parameter to blkcipher_walk_done.

Signed-off-by: Mikulas Patocka <mpatocka@redhat.com>
Acked-by: Ard Biesheuvel <ard.biesheuvel@linaro.org>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
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