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authorGilad Ben-Yossef <gilad@benyossef.com>2019-04-18 16:39:01 +0300
committerHerbert Xu <herbert@gondor.apana.org.au>2019-04-25 15:38:15 +0800
commit05c292afb0c0545c0cf084172db13e544eeb8f56 (patch)
tree317214521e23bc1e88d80aebadcc97d62ea46aa4 /drivers/crypto/ccree
parentc776f7d37b6bf3663c838b2d2223f8ec1b523b12 (diff)
crypto: ccree - zap entire sg on aead request unmap
We were trying to be clever zapping out of the cache only the required length out of scatter list on AEAD request completion and getting it wrong. As Knuth said: "when in douby, use brute force". Zap the whole length of the scatter list. Signed-off-by: Gilad Ben-Yossef <gilad@benyossef.com> Cc: stable@vger.kernel.org # v4.19+ Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Diffstat (limited to 'drivers/crypto/ccree')
-rw-r--r--drivers/crypto/ccree/cc_buffer_mgr.c13
1 files changed, 2 insertions, 11 deletions
diff --git a/drivers/crypto/ccree/cc_buffer_mgr.c b/drivers/crypto/ccree/cc_buffer_mgr.c
index fa625bdde3f9..09dceec7d828 100644
--- a/drivers/crypto/ccree/cc_buffer_mgr.c
+++ b/drivers/crypto/ccree/cc_buffer_mgr.c
@@ -517,9 +517,7 @@ void cc_unmap_aead_request(struct device *dev, struct aead_request *req)
{
struct aead_req_ctx *areq_ctx = aead_request_ctx(req);
unsigned int hw_iv_size = areq_ctx->hw_iv_size;
- struct crypto_aead *tfm = crypto_aead_reqtfm(req);
struct cc_drvdata *drvdata = dev_get_drvdata(dev);
- u32 size_to_unmap = 0;
if (areq_ctx->mac_buf_dma_addr) {
dma_unmap_single(dev, areq_ctx->mac_buf_dma_addr,
@@ -576,19 +574,12 @@ void cc_unmap_aead_request(struct device *dev, struct aead_request *req)
dev_dbg(dev, "Unmapping src sgl: req->src=%pK areq_ctx->src.nents=%u areq_ctx->assoc.nents=%u assoclen:%u cryptlen=%u\n",
sg_virt(req->src), areq_ctx->src.nents, areq_ctx->assoc.nents,
areq_ctx->assoclen, req->cryptlen);
- size_to_unmap = areq_ctx->assoclen + req->cryptlen;
- if (areq_ctx->gen_ctx.op_type == DRV_CRYPTO_DIRECTION_ENCRYPT)
- size_to_unmap += areq_ctx->req_authsize;
- if (areq_ctx->is_gcm4543)
- size_to_unmap += crypto_aead_ivsize(tfm);
- dma_unmap_sg(dev, req->src, sg_nents_for_len(req->src, size_to_unmap),
- DMA_BIDIRECTIONAL);
+ dma_unmap_sg(dev, req->src, sg_nents(req->src), DMA_BIDIRECTIONAL);
if (req->src != req->dst) {
dev_dbg(dev, "Unmapping dst sgl: req->dst=%pK\n",
sg_virt(req->dst));
- dma_unmap_sg(dev, req->dst,
- sg_nents_for_len(req->dst, size_to_unmap),
+ dma_unmap_sg(dev, req->dst, sg_nents(req->dst),
DMA_BIDIRECTIONAL);
}
if (drvdata->coherent &&