diff options
| author | Dan Carpenter <dan.carpenter@oracle.com> | 2021-04-09 15:24:28 +0300 |
|---|---|---|
| committer | Jakub Kicinski <kuba@kernel.org> | 2021-04-09 16:48:29 -0700 |
| commit | 626b598aa8becc95ad1c56e721c90ddfc6a8c409 (patch) | |
| tree | c209b9b4cdb13216b5650217bdff6d1a67e189c2 | |
| parent | 524e001b7dcaf50ade6eb115745561a46e374b06 (diff) | |
net: enetc: fix array underflow in error handling code
This loop will try to unmap enetc_unmap_tx_buff[-1] and crash.
Fixes: 9d2b68cc108d ("net: enetc: add support for XDP_REDIRECT")
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Reviewed-by: Claudiu Manoil <claudiu.manoil@nxp.com>
Reviewed-by: Vladimir Oltean <vladimir.oltean@nxp.com>
Link: https://lore.kernel.org/r/YHBHfCY/yv3EnM9z@mwanda
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
| -rw-r--r-- | drivers/net/ethernet/freescale/enetc/enetc.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/net/ethernet/freescale/enetc/enetc.c b/drivers/net/ethernet/freescale/enetc/enetc.c index 57049ae97201..d86395775ed0 100644 --- a/drivers/net/ethernet/freescale/enetc/enetc.c +++ b/drivers/net/ethernet/freescale/enetc/enetc.c @@ -895,7 +895,7 @@ static int enetc_xdp_frame_to_xdp_tx_swbd(struct enetc_bdr *tx_ring, dma = dma_map_single(tx_ring->dev, data, len, DMA_TO_DEVICE); if (unlikely(dma_mapping_error(tx_ring->dev, dma))) { /* Undo the DMA mapping for all fragments */ - while (n-- >= 0) + while (--n >= 0) enetc_unmap_tx_buff(tx_ring, &xdp_tx_arr[n]); netdev_err(tx_ring->ndev, "DMA map error\n"); |