[dm-devel] [PATCH 1/2] arm64 aes: fix encryption of unaligned data

Herbert Xu herbert at gondor.apana.org.au
Mon Jul 28 14:02:19 UTC 2014

On Fri, Jul 25, 2014 at 07:40:20PM -0400, Mikulas Patocka wrote:
> 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 at redhat.com>

Both patches applied to crypto.  Thanks for catching this!
Email: Herbert Xu <herbert at gondor.apana.org.au>
Home Page: http://gondor.apana.org.au/~herbert/
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