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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, M Chetan Kumar <m.chetan.kumar@intel.com>,
	Intel Corporation <linuxwwan@intel.com>,
	Loic Poulain <loic.poulain@linaro.org>,
	Sergey Ryazanov <ryazanov.s.a@gmail.com>,
	Johannes Berg <johannes@sipsolutions.net>,
	"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: wwan: iosm: Fix return type of ipc_wwan_link_transmit
Date: Mon, 12 Sep 2022 14:44:55 -0700	[thread overview]
Message-ID: <20220912214455.929028-1-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 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


WARNING: multiple messages have this Message-ID (diff)
From: Nathan Huckleberry <nhuck@google.com>
Cc: Nathan Huckleberry <nhuck@google.com>,
	Dan Carpenter <error27@gmail.com>,
	llvm@lists.linux.dev,  M Chetan Kumar <m.chetan.kumar@intel.com>,
	Intel Corporation <linuxwwan@intel.com>,
	 Loic Poulain <loic.poulain@linaro.org>,
	Sergey Ryazanov <ryazanov.s.a@gmail.com>,
	 Johannes Berg <johannes@sipsolutions.net>,
	"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: wwan: iosm: Fix return type of ipc_wwan_link_transmit
Date: Mon, 12 Sep 2022 14:44:55 -0700	[thread overview]
Message-ID: <20220912214455.929028-1-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 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


             reply	other threads:[~2022-09-12 21:45 UTC|newest]

Thread overview: 5+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2022-09-12 21:44 Nathan Huckleberry [this message]
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
2022-09-20  1:40   ` patchwork-bot+netdevbpf

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