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authorSubash Abhinov Kasiviswanathan <subashab@codeaurora.org>2018-06-04 19:43:38 -0600
committerDavid S. Miller <davem@davemloft.net>2018-06-05 10:17:05 -0400
commit3602207ca6582dd359308b7bd2ce08348cc0854e (patch)
tree08e0f5eec871e222f37de34825113408049d27d8 /drivers/net/ethernet/qualcomm
parentnet: ipv6: Generate random IID for addresses on RAWIP devices (diff)
downloadlinux-dev-3602207ca6582dd359308b7bd2ce08348cc0854e.tar.xz
linux-dev-3602207ca6582dd359308b7bd2ce08348cc0854e.zip
net: qualcomm: rmnet: Fix use after free while sending command ack
When sending an ack to a command packet, the skb is still referenced after it is sent to the real device. Since the real device could free the skb, the device pointer would be invalid. Also, remove an unnecessary variable. Fixes: ceed73a2cf4a ("drivers: net: ethernet: qualcomm: rmnet: Initial implementation") Signed-off-by: Subash Abhinov Kasiviswanathan <subashab@codeaurora.org> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers/net/ethernet/qualcomm')
-rw-r--r--drivers/net/ethernet/qualcomm/rmnet/rmnet_map_command.c8
1 files changed, 4 insertions, 4 deletions
diff --git a/drivers/net/ethernet/qualcomm/rmnet/rmnet_map_command.c b/drivers/net/ethernet/qualcomm/rmnet/rmnet_map_command.c
index 56a93df962e6..3ee8ae9b6838 100644
--- a/drivers/net/ethernet/qualcomm/rmnet/rmnet_map_command.c
+++ b/drivers/net/ethernet/qualcomm/rmnet/rmnet_map_command.c
@@ -67,7 +67,7 @@ static void rmnet_map_send_ack(struct sk_buff *skb,
struct rmnet_port *port)
{
struct rmnet_map_control_command *cmd;
- int xmit_status;
+ struct net_device *dev = skb->dev;
if (port->data_format & RMNET_FLAGS_INGRESS_MAP_CKSUMV4)
skb_trim(skb,
@@ -78,9 +78,9 @@ static void rmnet_map_send_ack(struct sk_buff *skb,
cmd = RMNET_MAP_GET_CMD_START(skb);
cmd->cmd_type = type & 0x03;
- netif_tx_lock(skb->dev);
- xmit_status = skb->dev->netdev_ops->ndo_start_xmit(skb, skb->dev);
- netif_tx_unlock(skb->dev);
+ netif_tx_lock(dev);
+ dev->netdev_ops->ndo_start_xmit(skb, dev);
+ netif_tx_unlock(dev);
}
/* Process MAP command frame and send N/ACK message as appropriate. Message cmd