From: Nathan Huckleberry nhuck@google.com
[ 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@gmail.com Link: https://github.com/ClangBuiltLinux/linux/issues/1703 Cc: llvm@lists.linux.dev Signed-off-by: Nathan Huckleberry nhuck@google.com Reviewed-by: Nathan Chancellor nathan@kernel.org Link: https://lore.kernel.org/r/20220912214344.928925-1-nhuck@google.com Signed-off-by: Jakub Kicinski kuba@kernel.org Signed-off-by: Sasha Levin sashal@kernel.org --- 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 ec1c14e3eace..09e3e516ded3 100644 --- a/drivers/net/ethernet/korina.c +++ b/drivers/net/ethernet/korina.c @@ -193,7 +193,8 @@ 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;