From: Thara Gopinath <thara.gopinath@xxxxxxxxxx> [ Upstream commit 1148a9654b5a69611d33e14719251c6ec20f5f2c ] Partial hash was being copied into the final result buffer without the entire message block processed. Depending on how the end user processes this result buffer, errors vary from result buffer corruption to result buffer poisoing. Fix this issue by ensuring that only the final hash value is copied into the result buffer. Reviewed-by: Bjorn Andersson <bjorn.andersson@xxxxxxxxxx> Signed-off-by: Thara Gopinath <thara.gopinath@xxxxxxxxxx> Signed-off-by: Herbert Xu <herbert@xxxxxxxxxxxxxxxxxxx> Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx> --- drivers/crypto/qce/sha.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/crypto/qce/sha.c b/drivers/crypto/qce/sha.c index d8a5db11b7ea1..49e29cb6d5b8d 100644 --- a/drivers/crypto/qce/sha.c +++ b/drivers/crypto/qce/sha.c @@ -55,7 +55,7 @@ static void qce_ahash_done(void *data) dma_unmap_sg(qce->dev, &rctx->result_sg, 1, DMA_FROM_DEVICE); memcpy(rctx->digest, result->auth_iv, digestsize); - if (req->result) + if (req->result && rctx->last_blk) memcpy(req->result, result->auth_iv, digestsize); rctx->byte_count[0] = cpu_to_be32(result->auth_byte_count[0]); -- 2.27.0
