The ndo_start_xmit field in net_device_ops is expected to be of type netdev_tx_t (*ndo_start_xmit)(struct sk_buff *skb, struct net_device *dev). The mismatched return type breaks forward edge kCFI since the underlying function definition does not match the function hook definition. The return type of r8712_xmit_entry should be changed from int to netdev_tx_t. Reported-by: Dan Carpenter <error27@xxxxxxxxx> Link: https://github.com/ClangBuiltLinux/linux/issues/1703 Cc: llvm@xxxxxxxxxxxxxxx Signed-off-by: Nathan Huckleberry <nhuck@xxxxxxxxxx> --- drivers/staging/rtl8712/xmit_linux.c | 6 +++--- 1 file changed, 3 insertions(+), 3 deletions(-) diff --git a/drivers/staging/rtl8712/xmit_linux.c b/drivers/staging/rtl8712/xmit_linux.c index 4a93839bf947..e84b9fa231cd 100644 --- a/drivers/staging/rtl8712/xmit_linux.c +++ b/drivers/staging/rtl8712/xmit_linux.c @@ -140,7 +140,7 @@ void r8712_xmit_complete(struct _adapter *padapter, struct xmit_frame *pxframe) pxframe->pkt = NULL; } -int r8712_xmit_entry(_pkt *pkt, struct net_device *netdev) +netdev_tx_t r8712_xmit_entry(_pkt *pkt, struct net_device *netdev) { struct xmit_frame *xmitframe = NULL; struct _adapter *adapter = netdev_priv(netdev); @@ -165,11 +165,11 @@ int r8712_xmit_entry(_pkt *pkt, struct net_device *netdev) } xmitpriv->tx_pkts++; xmitpriv->tx_bytes += xmitframe->attrib.last_txcmdsz; - return 0; + return NETDEV_TX_OK; _xmit_entry_drop: if (xmitframe) r8712_free_xmitframe(xmitpriv, xmitframe); xmitpriv->tx_drop++; dev_kfree_skb_any(pkt); - return 0; + return NETDEV_TX_OK; } -- 2.37.2.789.g6183377224-goog
