From: Nathan Huckleberry <nhuck@google.com>
To: unlisted-recipients:; (no To-header on input)
Cc: Nathan Huckleberry <nhuck@google.com>,
Dan Carpenter <error27@gmail.com>,
llvm@lists.linux.dev, "David S. Miller" <davem@davemloft.net>,
Eric Dumazet <edumazet@google.com>,
Jakub Kicinski <kuba@kernel.org>, Paolo Abeni <pabeni@redhat.com>,
Nathan Chancellor <nathan@kernel.org>,
Nick Desaulniers <ndesaulniers@google.com>,
Tom Rix <trix@redhat.com>,
netdev@vger.kernel.org, linux-kernel@vger.kernel.org
Subject: [PATCH] net: davicom: Fix return type of dm9000_start_xmit
Date: Mon, 12 Sep 2022 12:47:19 -0700 [thread overview]
Message-ID: <20220912194722.809525-1-nhuck@google.com> (raw)
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 dm9000_start_xmit 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>
---
drivers/net/ethernet/davicom/dm9000.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/net/ethernet/davicom/dm9000.c b/drivers/net/ethernet/davicom/dm9000.c
index 0985ab216566..186a5e0a7862 100644
--- a/drivers/net/ethernet/davicom/dm9000.c
+++ b/drivers/net/ethernet/davicom/dm9000.c
@@ -1012,7 +1012,7 @@ static void dm9000_send_packet(struct net_device *dev,
* Hardware start transmission.
* Send a packet to media from the upper layer.
*/
-static int
+static netdev_tx_t
dm9000_start_xmit(struct sk_buff *skb, struct net_device *dev)
{
unsigned long flags;
--
2.37.2.789.g6183377224-goog
next reply other threads:[~2022-09-12 19:48 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-09-12 19:47 Nathan Huckleberry [this message]
2022-09-13 22:29 ` [PATCH] net: davicom: Fix return type of dm9000_start_xmit Nathan Chancellor
2022-09-20 1:40 ` patchwork-bot+netdevbpf
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