From: Nathan Chancellor <nathan@kernel.org>
To: Nathan Huckleberry <nhuck@google.com>
Cc: 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>,
Nick Desaulniers <ndesaulniers@google.com>,
Tom Rix <trix@redhat.com>,
netdev@vger.kernel.org, linux-kernel@vger.kernel.org
Subject: Re: [PATCH] net: davicom: Fix return type of dm9000_start_xmit
Date: Tue, 13 Sep 2022 15:29:15 -0700 [thread overview]
Message-ID: <YyEEO0ttQhMvLFIC@dev-arch.thelio-3990X> (raw)
In-Reply-To: <20220912194722.809525-1-nhuck@google.com>
On Mon, Sep 12, 2022 at 12:47:19PM -0700, Nathan Huckleberry wrote:
> 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>
Reviewed-by: Nathan Chancellor <nathan@kernel.org>
> ---
> 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 prev parent reply other threads:[~2022-09-13 22:29 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-09-12 19:47 [PATCH] net: davicom: Fix return type of dm9000_start_xmit Nathan Huckleberry
2022-09-12 19:47 ` Nathan Huckleberry
2022-09-13 22:29 ` Nathan Chancellor [this message]
2022-09-20 1:40 ` patchwork-bot+netdevbpf
2022-09-20 1:40 ` patchwork-bot+netdevbpf
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