| Message ID | 20201020063420.187497-1-xie.he.0141@gmail.com (mailing list archive) |
|---|---|
| State | Not Applicable |
| Delegated to: | Netdev Maintainers |
| Headers | show |
| Series | [net] net: hdlc_raw_eth: Clear the IFF_TX_SKB_SHARING flag after calling ether_setup | expand |
On Mon, 19 Oct 2020 23:34:20 -0700 Xie He wrote: > This driver calls ether_setup to set up the network device. > The ether_setup function would add the IFF_TX_SKB_SHARING flag to the > device. This flag indicates that it is safe to transmit shared skbs to > the device. > > However, this is not true. This driver may pad the frame (in eth_tx) > before transmission, so the skb may be modified. > > Cc: Neil Horman <nhorman@tuxdriver.com> > Cc: Krzysztof Halasa <khc@pm.waw.pl> > Signed-off-by: Xie He <xie.he.0141@gmail.com> Applied, thank you. In the future please try to provide a Fixes: tag.
On Wed, Oct 21, 2020 at 6:02 PM Jakub Kicinski <kuba@kernel.org> wrote: > > Applied, thank you. > > In the future please try to provide a Fixes: tag. OK. Thanks! I'll remember this in the future!
diff --git a/drivers/net/wan/hdlc_raw_eth.c b/drivers/net/wan/hdlc_raw_eth.c index 08e0a46501de..c70a518b8b47 100644 --- a/drivers/net/wan/hdlc_raw_eth.c +++ b/drivers/net/wan/hdlc_raw_eth.c @@ -99,6 +99,7 @@ static int raw_eth_ioctl(struct net_device *dev, struct ifreq *ifr) old_qlen = dev->tx_queue_len; ether_setup(dev); dev->tx_queue_len = old_qlen; + dev->priv_flags &= ~IFF_TX_SKB_SHARING; eth_hw_addr_random(dev); call_netdevice_notifiers(NETDEV_POST_TYPE_CHANGE, dev); netif_dormant_off(dev);
This driver calls ether_setup to set up the network device. The ether_setup function would add the IFF_TX_SKB_SHARING flag to the device. This flag indicates that it is safe to transmit shared skbs to the device. However, this is not true. This driver may pad the frame (in eth_tx) before transmission, so the skb may be modified. Cc: Neil Horman <nhorman@tuxdriver.com> Cc: Krzysztof Halasa <khc@pm.waw.pl> Signed-off-by: Xie He <xie.he.0141@gmail.com> --- drivers/net/wan/hdlc_raw_eth.c | 1 + 1 file changed, 1 insertion(+)