From: Nathan Huckleberry <nhuck@xxxxxxxxxx> [ Upstream commit 106c67ce46f3c82dd276e983668a91d6ed631173 ] 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 korina_send_packet 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> Reviewed-by: Nathan Chancellor <nathan@xxxxxxxxxx> Link: https://lore.kernel.org/r/20220912214344.928925-1-nhuck@xxxxxxxxxx Signed-off-by: Jakub Kicinski <kuba@xxxxxxxxxx> Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx> --- drivers/net/ethernet/korina.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/drivers/net/ethernet/korina.c b/drivers/net/ethernet/korina.c index 925161959b9b..7d74bb932ee1 100644 --- a/drivers/net/ethernet/korina.c +++ b/drivers/net/ethernet/korina.c @@ -196,7 +196,8 @@ static void korina_chain_rx(struct korina_private *lp, } /* transmit packet */ -static int korina_send_packet(struct sk_buff *skb, struct net_device *dev) +static netdev_tx_t korina_send_packet(struct sk_buff *skb, + struct net_device *dev) { struct korina_private *lp = netdev_priv(dev); unsigned long flags; -- 2.35.1
