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| author | Antoine Tenart <antoine.tenart@bootlin.com> | 2018-03-19 09:21:17 +0100 |
|---|---|---|
| committer | Herbert Xu <herbert@gondor.apana.org.au> | 2018-03-31 01:32:45 +0800 |
| commit | b89a815975e5dd3ffa4b4f6392eceff66c48476e (patch) | |
| tree | cdcbad086a29406d2125156f447f0b4dbef2c946 /drivers/crypto/inside-secure/safexcel_hash.c | |
| parent | 57433b582090ce0d751009e931f15a653e22ee85 (diff) | |
| download | linux-stable-b89a815975e5dd3ffa4b4f6392eceff66c48476e.tar.gz linux-stable-b89a815975e5dd3ffa4b4f6392eceff66c48476e.tar.bz2 linux-stable-b89a815975e5dd3ffa4b4f6392eceff66c48476e.zip | |
crypto: inside-secure - do not access buffers mapped to the device
This patches update the way the digest is copied from the state buffer
to the result buffer, so that the copy only happen after the state
buffer was DMA unmapped, as otherwise the buffer would be owned by the
device.
Signed-off-by: Antoine Tenart <antoine.tenart@bootlin.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Diffstat (limited to 'drivers/crypto/inside-secure/safexcel_hash.c')
| -rw-r--r-- | drivers/crypto/inside-secure/safexcel_hash.c | 8 |
1 files changed, 4 insertions, 4 deletions
diff --git a/drivers/crypto/inside-secure/safexcel_hash.c b/drivers/crypto/inside-secure/safexcel_hash.c index ee4caf34c5a7..d3ba935d0266 100644 --- a/drivers/crypto/inside-secure/safexcel_hash.c +++ b/drivers/crypto/inside-secure/safexcel_hash.c @@ -156,10 +156,6 @@ static int safexcel_handle_req_result(struct safexcel_crypto_priv *priv, int rin safexcel_complete(priv, ring); spin_unlock_bh(&priv->ring[ring].egress_lock); - if (sreq->finish) - memcpy(areq->result, sreq->state, - crypto_ahash_digestsize(ahash)); - if (sreq->nents) { dma_unmap_sg(priv->dev, areq->src, sreq->nents, DMA_TO_DEVICE); sreq->nents = 0; @@ -177,6 +173,10 @@ static int safexcel_handle_req_result(struct safexcel_crypto_priv *priv, int rin sreq->cache_dma = 0; } + if (sreq->finish) + memcpy(areq->result, sreq->state, + crypto_ahash_digestsize(ahash)); + cache_len = sreq->len - sreq->processed; if (cache_len) memcpy(sreq->cache, sreq->cache_next, cache_len); |