The patch below does not apply to the 4.9-stable tree. If someone wants it applied there, or to any other stable or longterm tree, then please email the backport, including the original git commit id to stable@vger.kernel.org.
thanks,
greg k-h
------------------ original commit in Linus's tree ------------------
From 7bdcd851fa7eb66e8922aa7f6cba9e2f2427a7cf Mon Sep 17 00:00:00 2001
From: Corentin Labbe clabbe@baylibre.com Date: Mon, 14 Dec 2020 20:02:26 +0000 Subject: [PATCH] crypto: sun4i-ss - checking sg length is not sufficient
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
diff --git a/drivers/crypto/allwinner/sun4i-ss/sun4i-ss-cipher.c b/drivers/crypto/allwinner/sun4i-ss/sun4i-ss-cipher.c index 19f1aa577ed4..f49797588329 100644 --- a/drivers/crypto/allwinner/sun4i-ss/sun4i-ss-cipher.c +++ b/drivers/crypto/allwinner/sun4i-ss/sun4i-ss-cipher.c @@ -186,12 +186,12 @@ 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); }