[ Upstream commit eae55a586c3c8b50982bad3c3426e9c9dd7a0075 ]
The driver assumes that the ICV is as a single piece in the last element of the scatterlist. This assumption is wrong.
This patch ensures that the ICV is properly handled regardless of the scatterlist layout.
Fixes: 9c4a79653b35 ("crypto: talitos - Freescale integrated security engine (SEC) driver") Signed-off-by: Christophe Leroy christophe.leroy@c-s.fr Signed-off-by: Herbert Xu herbert@gondor.apana.org.au Signed-off-by: Sasha Levin sashal@kernel.org --- drivers/crypto/talitos.c | 26 +++++++++++++++----------- 1 file changed, 15 insertions(+), 11 deletions(-)
diff --git a/drivers/crypto/talitos.c b/drivers/crypto/talitos.c index 396199b2db7d..fb852727ee1a 100644 --- a/drivers/crypto/talitos.c +++ b/drivers/crypto/talitos.c @@ -1036,7 +1036,6 @@ static void ipsec_esp_encrypt_done(struct device *dev, unsigned int authsize = crypto_aead_authsize(authenc); unsigned int ivsize = crypto_aead_ivsize(authenc); struct talitos_edesc *edesc; - struct scatterlist *sg; void *icvdata;
edesc = container_of(desc, struct talitos_edesc, desc); @@ -1050,9 +1049,8 @@ static void ipsec_esp_encrypt_done(struct device *dev, else icvdata = &edesc->link_tbl[edesc->src_nents + edesc->dst_nents + 2]; - sg = sg_last(areq->dst, edesc->dst_nents); - memcpy((char *)sg_virt(sg) + sg->length - authsize, - icvdata, authsize); + sg_pcopy_from_buffer(areq->dst, edesc->dst_nents ? : 1, icvdata, + authsize, areq->assoclen + areq->cryptlen); }
dma_unmap_single(dev, edesc->iv_dma, ivsize, DMA_TO_DEVICE); @@ -1070,7 +1068,6 @@ static void ipsec_esp_decrypt_swauth_done(struct device *dev, struct crypto_aead *authenc = crypto_aead_reqtfm(req); unsigned int authsize = crypto_aead_authsize(authenc); struct talitos_edesc *edesc; - struct scatterlist *sg; char *oicv, *icv; struct talitos_private *priv = dev_get_drvdata(dev); bool is_sec1 = has_ftr_sec1(priv); @@ -1080,9 +1077,18 @@ static void ipsec_esp_decrypt_swauth_done(struct device *dev, ipsec_esp_unmap(dev, edesc, req);
if (!err) { + char icvdata[SHA512_DIGEST_SIZE]; + int nents = edesc->dst_nents ? : 1; + unsigned int len = req->assoclen + req->cryptlen; + /* auth check */ - sg = sg_last(req->dst, edesc->dst_nents ? : 1); - icv = (char *)sg_virt(sg) + sg->length - authsize; + if (nents > 1) { + sg_pcopy_to_buffer(req->dst, nents, icvdata, authsize, + len - authsize); + icv = icvdata; + } else { + icv = (char *)sg_virt(req->dst) + len - authsize; + }
if (edesc->dma_len) { if (is_sec1) @@ -1498,7 +1504,6 @@ static int aead_decrypt(struct aead_request *req) struct talitos_ctx *ctx = crypto_aead_ctx(authenc); struct talitos_private *priv = dev_get_drvdata(ctx->dev); struct talitos_edesc *edesc; - struct scatterlist *sg; void *icvdata;
req->cryptlen -= authsize; @@ -1532,9 +1537,8 @@ static int aead_decrypt(struct aead_request *req) else icvdata = &edesc->link_tbl[0];
- sg = sg_last(req->src, edesc->src_nents ? : 1); - - memcpy(icvdata, (char *)sg_virt(sg) + sg->length - authsize, authsize); + sg_pcopy_to_buffer(req->src, edesc->src_nents ? : 1, icvdata, authsize, + req->assoclen + req->cryptlen - authsize);
return ipsec_esp(edesc, req, ipsec_esp_decrypt_swauth_done); }