From: Maxim Mikityanskiy <[email protected]>
xdp_return_frame releases the frame. It leads to releasing the page, so
it's not allowed to access xdpi.xdpf->len after that, because xdpi.xdpf
is at xdp->data_hard_start after convert_to_xdp_frame. This patch moves
the memory access to precede the return of the frame.
Fixes: 58b99ee3e3ebe ("net/mlx5e: Add support for XDP_REDIRECT in device-out
side")
Signed-off-by: Maxim Mikityanskiy <[email protected]>
Signed-off-by: Saeed Mahameed <[email protected]>
---
drivers/net/ethernet/mellanox/mlx5/core/en/xdp.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/drivers/net/ethernet/mellanox/mlx5/core/en/xdp.c
b/drivers/net/ethernet/mellanox/mlx5/core/en/xdp.c
index 03b2a9f9c589..10a99cd3e598 100644
--- a/drivers/net/ethernet/mellanox/mlx5/core/en/xdp.c
+++ b/drivers/net/ethernet/mellanox/mlx5/core/en/xdp.c
@@ -304,9 +304,9 @@ bool mlx5e_poll_xdpsq_cq(struct mlx5e_cq *cq, struct
mlx5e_rq *rq)
mlx5e_xdpi_fifo_pop(xdpi_fifo);
if (is_redirect) {
- xdp_return_frame(xdpi.xdpf);
dma_unmap_single(sq->pdev,
xdpi.dma_addr,
xdpi.xdpf->len,
DMA_TO_DEVICE);
+ xdp_return_frame(xdpi.xdpf);
} else {
/* Recycle RX page */
mlx5e_page_release(rq, &xdpi.di, true);
@@ -345,9 +345,9 @@ void mlx5e_free_xdpsq_descs(struct mlx5e_xdpsq *sq, struct
mlx5e_rq *rq)
mlx5e_xdpi_fifo_pop(xdpi_fifo);
if (is_redirect) {
- xdp_return_frame(xdpi.xdpf);
dma_unmap_single(sq->pdev, xdpi.dma_addr,
xdpi.xdpf->len, DMA_TO_DEVICE);
+ xdp_return_frame(xdpi.xdpf);
} else {
/* Recycle RX page */
mlx5e_page_release(rq, &xdpi.di, false);
--
2.20.1
