From: Xie He Date: Tue, 20 Oct 2020 06:34:20 +0000 (-0700) Subject: net: hdlc_raw_eth: Clear the IFF_TX_SKB_SHARING flag after calling ether_setup X-Git-Tag: microblaze-v5.11~43^2~9 X-Git-Url: http://git.monstr.eu/?a=commitdiff_plain;h=5fce1e43e2d5bf2f7e3224d7b99b1c65ab2c26e2;p=linux-2.6-microblaze.git net: hdlc_raw_eth: Clear the IFF_TX_SKB_SHARING flag after calling ether_setup 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. Fixes: 550fd08c2ceb ("net: Audit drivers to identify those needing IFF_TX_SKB_SHARING cleared") Cc: Neil Horman Cc: Krzysztof Halasa Signed-off-by: Xie He Link: https://lore.kernel.org/r/20201020063420.187497-1-xie.he.0141@gmail.com Signed-off-by: Jakub Kicinski --- 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);