diff options
| author | Lorenzo Bianconi <lorenzo@kernel.org> | 2023-12-17 16:37:40 +0100 |
|---|---|---|
| committer | Paolo Abeni <pabeni@redhat.com> | 2023-12-21 08:09:22 +0100 |
| commit | 7cb8cd4daacfea646cf8b5925ca2c66c98b18480 (patch) | |
| tree | eae3d28872e7ad9ed79d19969e4134889e25e0e8 | |
| parent | bd7f77dae69532ffc027ee50ff99e3792dc30b7f (diff) | |
net: ethernet: mtk_wed: fix possible NULL pointer dereference in mtk_wed_wo_queue_tx_clean()
In order to avoid a NULL pointer dereference, check entry->buf pointer before running
skb_free_frag in mtk_wed_wo_queue_tx_clean routine.
Fixes: 799684448e3e ("net: ethernet: mtk_wed: introduce wed wo support")
Signed-off-by: Lorenzo Bianconi <lorenzo@kernel.org>
Reviewed-by: Simon Horman <horms@kernel.org>
Link: https://lore.kernel.org/r/3c1262464d215faa8acebfc08869798c81c96f4a.1702827359.git.lorenzo@kernel.org
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
| -rw-r--r-- | drivers/net/ethernet/mediatek/mtk_wed_wo.c | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/drivers/net/ethernet/mediatek/mtk_wed_wo.c b/drivers/net/ethernet/mediatek/mtk_wed_wo.c index 3bd51a3d6650..ae44ad5f8ce8 100644 --- a/drivers/net/ethernet/mediatek/mtk_wed_wo.c +++ b/drivers/net/ethernet/mediatek/mtk_wed_wo.c @@ -291,6 +291,9 @@ mtk_wed_wo_queue_tx_clean(struct mtk_wed_wo *wo, struct mtk_wed_wo_queue *q) for (i = 0; i < q->n_desc; i++) { struct mtk_wed_wo_queue_entry *entry = &q->entry[i]; + if (!entry->buf) + continue; + dma_unmap_single(wo->hw->dev, entry->addr, entry->len, DMA_TO_DEVICE); skb_free_frag(entry->buf); |