6.10-stable review patch. If anyone has any objections, please let me know.
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From: David Gstir david@sigma-star.at
[ Upstream commit dd52b5eeb0f70893f762da7254e923fd23fd1379 ]
We could leak stack memory through the payload field when running AES with a key from one of the hardware's key slots. Fix this by ensuring the payload field is set to 0 in such cases.
This does not affect the common use case when the key is supplied from main memory via the descriptor payload.
Signed-off-by: David Gstir david@sigma-star.at Reported-by: kernel test robot lkp@intel.com Reported-by: Dan Carpenter dan.carpenter@linaro.org Closes: https://lore.kernel.org/r/202405270146.Y9tPoil8-lkp@intel.com/ Fixes: 3d16af0b4cfa ("crypto: mxs-dcp: Add support for hardware-bound keys") Signed-off-by: Herbert Xu herbert@gondor.apana.org.au Signed-off-by: Sasha Levin sashal@kernel.org --- drivers/crypto/mxs-dcp.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-)
diff --git a/drivers/crypto/mxs-dcp.c b/drivers/crypto/mxs-dcp.c index 057d73c370b73..c82775dbb557a 100644 --- a/drivers/crypto/mxs-dcp.c +++ b/drivers/crypto/mxs-dcp.c @@ -225,7 +225,8 @@ static int mxs_dcp_start_dma(struct dcp_async_ctx *actx) static int mxs_dcp_run_aes(struct dcp_async_ctx *actx, struct skcipher_request *req, int init) { - dma_addr_t key_phys, src_phys, dst_phys; + dma_addr_t key_phys = 0; + dma_addr_t src_phys, dst_phys; struct dcp *sdcp = global_sdcp; struct dcp_dma_desc *desc = &sdcp->coh->desc[actx->chan]; struct dcp_aes_req_ctx *rctx = skcipher_request_ctx(req);