* [PATCH] net: wwan: iosm: Fix return type of ipc_wwan_link_transmit
@ 2022-09-12 21:44 Nathan Huckleberry
2022-09-13 0:56 ` Sergey Ryazanov
2022-09-20 1:40 ` patchwork-bot+netdevbpf
0 siblings, 2 replies; 3+ messages in thread
From: Nathan Huckleberry @ 2022-09-12 21:44 UTC (permalink / raw)
Cc: Nathan Huckleberry, Dan Carpenter, llvm, M Chetan Kumar,
Intel Corporation, Loic Poulain, Sergey Ryazanov, Johannes Berg,
David S. Miller, Eric Dumazet, Jakub Kicinski, Paolo Abeni,
Nathan Chancellor, Nick Desaulniers, Tom Rix, netdev,
linux-kernel
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 ipc_wwan_link_transmit 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/wwan/iosm/iosm_ipc_wwan.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/drivers/net/wwan/iosm/iosm_ipc_wwan.c b/drivers/net/wwan/iosm/iosm_ipc_wwan.c
index 27151148c782..03757ad21d51 100644
--- a/drivers/net/wwan/iosm/iosm_ipc_wwan.c
+++ b/drivers/net/wwan/iosm/iosm_ipc_wwan.c
@@ -103,8 +103,8 @@ static int ipc_wwan_link_stop(struct net_device *netdev)
}
/* Transmit a packet */
-static int ipc_wwan_link_transmit(struct sk_buff *skb,
- struct net_device *netdev)
+static netdev_tx_t ipc_wwan_link_transmit(struct sk_buff *skb,
+ struct net_device *netdev)
{
struct iosm_netdev_priv *priv = wwan_netdev_drvpriv(netdev);
struct iosm_wwan *ipc_wwan = priv->ipc_wwan;
--
2.37.2.789.g6183377224-goog
^ permalink raw reply related [flat|nested] 3+ messages in thread* Re: [PATCH] net: wwan: iosm: Fix return type of ipc_wwan_link_transmit
2022-09-12 21:44 [PATCH] net: wwan: iosm: Fix return type of ipc_wwan_link_transmit Nathan Huckleberry
@ 2022-09-13 0:56 ` Sergey Ryazanov
2022-09-20 1:40 ` patchwork-bot+netdevbpf
1 sibling, 0 replies; 3+ messages in thread
From: Sergey Ryazanov @ 2022-09-13 0:56 UTC (permalink / raw)
To: Nathan Huckleberry
Cc: Dan Carpenter, llvm, M Chetan Kumar, Intel Corporation,
Loic Poulain, Johannes Berg, David S. Miller, Eric Dumazet,
Jakub Kicinski, Paolo Abeni, Nathan Chancellor, Nick Desaulniers,
Tom Rix, netdev, linux-kernel
On Tue, Sep 13, 2022 at 12:45 AM Nathan Huckleberry <nhuck@google.com> 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 ipc_wwan_link_transmit 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>
Acked-by: Sergey Ryazanov <ryazanov.s.a@gmail.com>
^ permalink raw reply [flat|nested] 3+ messages in thread
* Re: [PATCH] net: wwan: iosm: Fix return type of ipc_wwan_link_transmit
2022-09-12 21:44 [PATCH] net: wwan: iosm: Fix return type of ipc_wwan_link_transmit Nathan Huckleberry
2022-09-13 0:56 ` Sergey Ryazanov
@ 2022-09-20 1:40 ` patchwork-bot+netdevbpf
1 sibling, 0 replies; 3+ messages in thread
From: patchwork-bot+netdevbpf @ 2022-09-20 1:40 UTC (permalink / raw)
To: Nathan Huckleberry
Cc: error27, llvm, m.chetan.kumar, linuxwwan, loic.poulain,
ryazanov.s.a, johannes, davem, edumazet, kuba, pabeni, nathan,
ndesaulniers, trix, netdev, linux-kernel
Hello:
This patch was applied to netdev/net-next.git (master)
by Jakub Kicinski <kuba@kernel.org>:
On Mon, 12 Sep 2022 14:44:55 -0700 you 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 ipc_wwan_link_transmit should be changed from int to
> netdev_tx_t.
>
> [...]
Here is the summary with links:
- net: wwan: iosm: Fix return type of ipc_wwan_link_transmit
https://git.kernel.org/netdev/net-next/c/0c9441c43010
You are awesome, thank you!
--
Deet-doot-dot, I am a bot.
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^ permalink raw reply [flat|nested] 3+ messages in thread
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2022-09-12 21:44 [PATCH] net: wwan: iosm: Fix return type of ipc_wwan_link_transmit Nathan Huckleberry
2022-09-13 0:56 ` Sergey Ryazanov
2022-09-20 1:40 ` patchwork-bot+netdevbpf
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