| Message ID | 20241206190015.4194153-4-nikita.yoush@cogentembedded.com (mailing list archive) |
|---|---|
| State | Superseded |
| Delegated to: | Netdev Maintainers |
| Headers | show |
| Series | net: renesas: rswitch: several fixes | expand |
diff --git a/drivers/net/ethernet/renesas/rswitch.c b/drivers/net/ethernet/renesas/rswitch.c index 800744a6c25b..9c55f3480678 100644 --- a/drivers/net/ethernet/renesas/rswitch.c +++ b/drivers/net/ethernet/renesas/rswitch.c @@ -1704,6 +1704,7 @@ static netdev_tx_t rswitch_start_xmit(struct sk_buff *skb, struct net_device *nd return ret; err_unmap: + gq->skbs[(gq->cur + nr_desc - 1) % gq->ring_size] = NULL; dma_unmap_single(ndev->dev.parent, dma_addr_orig, skb->len, DMA_TO_DEVICE); err_kfree:
If error path is taken while filling descriptor for a frame, skb pointer is left in the entry. Later, on the ring entry reuse, the same entry could be used as a part of a multi-descriptor frame, and skb for that new frame could be stored in a different entry. Then, the stale pointer will reach the completion routine, and passed to the release operation. Fix that by clearing the saved skb pointer at the error path. Fixes: d2c96b9d5f83 ("net: rswitch: Add jumbo frames handling for TX") Signed-off-by: Nikita Yushchenko <nikita.yoush@cogentembedded.com> --- drivers/net/ethernet/renesas/rswitch.c | 1 + 1 file changed, 1 insertion(+)