This is a note to let you know that I've just added the patch titled
crypto: qat - unmap buffer before free for DH
to the 6.1-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
crypto-qat-unmap-buffer-before-free-for-dh.patch
and it can be found in the queue-6.1 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
commit 3ee6cda143d2622ec2d29a7c065d883b95c17c03
Author: Hareshx Sankar Raj <hareshx.sankar.raj@xxxxxxxxx>
Date: Mon Jun 5 22:06:06 2023 +0100
crypto: qat - unmap buffer before free for DH
[ Upstream commit eb7713f5ca97697b92f225127440d1525119b8de ]
The callback function for DH frees the memory allocated for the
destination buffer before unmapping it.
This sequence is wrong.
Change the cleanup sequence to unmap the buffer before freeing it.
Fixes: 029aa4624a7f ("crypto: qat - remove dma_free_coherent() for DH")
Signed-off-by: Hareshx Sankar Raj <hareshx.sankar.raj@xxxxxxxxx>
Co-developed-by: Bolemx Sivanagaleela <bolemx.sivanagaleela@xxxxxxxxx>
Signed-off-by: Bolemx Sivanagaleela <bolemx.sivanagaleela@xxxxxxxxx>
Reviewed-by: Giovanni Cabiddu <giovanni.cabiddu@xxxxxxxxx>
Reviewed-by: Andy Shevchenko <andriy.shevchenko@xxxxxxxxxxxxxxx>
Signed-off-by: Giovanni Cabiddu <giovanni.cabiddu@xxxxxxxxx>
Signed-off-by: Herbert Xu <herbert@xxxxxxxxxxxxxxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
diff --git a/drivers/crypto/qat/qat_common/qat_asym_algs.c b/drivers/crypto/qat/qat_common/qat_asym_algs.c
index 935a7e012946e..8806242469a06 100644
--- a/drivers/crypto/qat/qat_common/qat_asym_algs.c
+++ b/drivers/crypto/qat/qat_common/qat_asym_algs.c
@@ -170,15 +170,14 @@ static void qat_dh_cb(struct icp_qat_fw_pke_resp *resp)
}
areq->dst_len = req->ctx.dh->p_size;
+ dma_unmap_single(dev, req->out.dh.r, req->ctx.dh->p_size,
+ DMA_FROM_DEVICE);
if (req->dst_align) {
scatterwalk_map_and_copy(req->dst_align, areq->dst, 0,
areq->dst_len, 1);
kfree_sensitive(req->dst_align);
}
- dma_unmap_single(dev, req->out.dh.r, req->ctx.dh->p_size,
- DMA_FROM_DEVICE);
-
dma_unmap_single(dev, req->phy_in, sizeof(struct qat_dh_input_params),
DMA_TO_DEVICE);
dma_unmap_single(dev, req->phy_out,
