diff options
| author | Wei Fang <wei.fang@nxp.com> | 2025-02-24 14:12:51 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2025-03-07 20:25:41 +0300 |
| commit | 57e56fc2bfc6c73936fdcf9e8911534b044391f6 (patch) | |
| tree | 63b98c60b262ceded2efe46cb37359a4ff235d72 | |
| parent | 56e26b5b3d14880f1ae80f7f228fe85fc4477597 (diff) | |
| download | linux-57e56fc2bfc6c73936fdcf9e8911534b044391f6.tar.xz | |
net: enetc: fix the off-by-one issue in enetc_map_tx_tso_buffs()
commit 249df695c3ffe8c8d36d46c2580ce72410976f96 upstream.
There is an off-by-one issue for the err_chained_bd path, it will free
one more tx_swbd than expected. But there is no such issue for the
err_map_data path. To fix this off-by-one issue and make the two error
handling consistent, the increment of 'i' and 'count' remain in sync
and enetc_unwind_tx_frame() is called for error handling.
Fixes: fb8629e2cbfc ("net: enetc: add support for software TSO")
Cc: stable@vger.kernel.org
Suggested-by: Vladimir Oltean <vladimir.oltean@nxp.com>
Signed-off-by: Wei Fang <wei.fang@nxp.com>
Reviewed-by: Vladimir Oltean <vladimir.oltean@nxp.com>
Reviewed-by: Claudiu Manoil <claudiu.manoil@nxp.com>
Link: https://patch.msgid.link/20250224111251.1061098-9-wei.fang@nxp.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
| -rw-r--r-- | drivers/net/ethernet/freescale/enetc/enetc.c | 15 |
1 files changed, 7 insertions, 8 deletions
diff --git a/drivers/net/ethernet/freescale/enetc/enetc.c b/drivers/net/ethernet/freescale/enetc/enetc.c index 4d7e29d03966..f662a5d54986 100644 --- a/drivers/net/ethernet/freescale/enetc/enetc.c +++ b/drivers/net/ethernet/freescale/enetc/enetc.c @@ -590,8 +590,13 @@ static int enetc_map_tx_tso_buffs(struct enetc_bdr *tx_ring, struct sk_buff *skb err = enetc_map_tx_tso_data(tx_ring, skb, tx_swbd, txbd, tso.data, size, size == data_len); - if (err) + if (err) { + if (i == 0) + i = tx_ring->bd_count; + i--; + goto err_map_data; + } data_len -= size; count++; @@ -620,13 +625,7 @@ err_map_data: dev_err(tx_ring->dev, "DMA map error"); err_chained_bd: - do { - tx_swbd = &tx_ring->tx_swbd[i]; - enetc_free_tx_frame(tx_ring, tx_swbd); - if (i == 0) - i = tx_ring->bd_count; - i--; - } while (count--); + enetc_unwind_tx_frame(tx_ring, count, i); return 0; } |