On Fri, Oct 30, 2015 at 6:45 PM, Ram Pai <linuxram@xxxxxxxxxx> wrote:
> The nx-842 compressor overshoots the output buffer corrupting memory. Verified
> that the following patch fixes the issue on a little-endian system.
>
> Signed-off-by: Ram Pai <linuxram@xxxxxxxxxx>
> ---
> drivers/crypto/nx/nx-842-powernv.c | 2 +-
> 1 files changed, 1 insertions(+), 1 deletions(-)
>
> diff --git a/drivers/crypto/nx/nx-842-powernv.c b/drivers/crypto/nx/nx-842-powernv.c
> index 3750e13..3b80ea7 100644
> --- a/drivers/crypto/nx/nx-842-powernv.c
> +++ b/drivers/crypto/nx/nx-842-powernv.c
> @@ -66,7 +66,7 @@ static void setup_indirect_dde(struct data_descriptor_entry *dde,
> unsigned int dde_count, unsigned int byte_count)
> {
> dde->flags = 0;
> - dde->count = dde_count;
> + dde->count = cpu_to_be32(dde_count);
->count is u8, I don't think this is correct...you could change
dde_count to a u8, but I'm skeptical that's required at all, are you
sure this is your problem? The dde->length should restrict the coproc
from r/w past the output buffer anyway, even if the ->count is too
large...
> dde->index = 0;
> dde->length = cpu_to_be32(byte_count);
> dde->address = cpu_to_be64(nx842_get_pa(ddl));
>
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