From: Corentin Labbe clabbe@baylibre.com
commit 7bdcd851fa7eb66e8922aa7f6cba9e2f2427a7cf upstream.
The optimized cipher function need length multiple of 4 bytes. But it get sometimes odd length. This is due to SG data could be stored with an offset.
So the fix is to check also if the offset is aligned with 4 bytes. Fixes: 6298e948215f2 ("crypto: sunxi-ss - Add Allwinner Security System crypto accelerator") Cc: stable@vger.kernel.org Signed-off-by: Corentin Labbe clabbe@baylibre.com Signed-off-by: Herbert Xu herbert@gondor.apana.org.au Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- drivers/crypto/sunxi-ss/sun4i-ss-cipher.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/drivers/crypto/sunxi-ss/sun4i-ss-cipher.c b/drivers/crypto/sunxi-ss/sun4i-ss-cipher.c index 178096e4e77da..5a5bd6ee535e6 100644 --- a/drivers/crypto/sunxi-ss/sun4i-ss-cipher.c +++ b/drivers/crypto/sunxi-ss/sun4i-ss-cipher.c @@ -189,12 +189,12 @@ static int sun4i_ss_cipher_poll(struct skcipher_request *areq) * we can use the SS optimized function */ while (in_sg && no_chunk == 1) { - if (in_sg->length % 4) + if ((in_sg->length | in_sg->offset) & 3u) no_chunk = 0; in_sg = sg_next(in_sg); } while (out_sg && no_chunk == 1) { - if (out_sg->length % 4) + if ((out_sg->length | out_sg->offset) & 3u) no_chunk = 0; out_sg = sg_next(out_sg); }