[PATCH net-next v1] rtnetlink: remove redundant checks for nlattr IFLA_BRIDGE_MODE

[PATCH net-next v1] rtnetlink: remove redundant checks for nlattr IFLA_BRIDGE_MODE

[Lin Ma]

The previous patch added the nla_len check in rtnl_bridge_setlink, which
is the only caller for ndo_bridge_setlink handlers defined in low-level
driver codes. Hence, this patch cleanups the redundant checks in each
ndo_bridge_setlink handler function.

Please apply the fix discussed at the link:
https://lore.kernel.org/all/20230726075314.1059224-1-linma@zju.edu.cn/
first before this one.

Suggested-by: Hangbin Liu <liuhangbin@gmail.com>
Signed-off-by: Lin Ma <linma@zju.edu.cn>
---
 drivers/net/ethernet/broadcom/bnxt/bnxt.c           | 3 ---
 drivers/net/ethernet/emulex/benet/be_main.c         | 3 ---
 drivers/net/ethernet/intel/ixgbe/ixgbe_main.c       | 3 ---
 drivers/net/ethernet/mellanox/mlx5/core/en_main.c   | 3 ---
 drivers/net/ethernet/netronome/nfp/nfp_net_common.c | 3 ---
 5 files changed, 15 deletions(-)

diff --git a/drivers/net/ethernet/broadcom/bnxt/bnxt.c b/drivers/net/ethernet/broadcom/bnxt/bnxt.c
index e5b54e6025be..9e098c1cf1ab 100644
--- a/drivers/net/ethernet/broadcom/bnxt/bnxt.c
+++ b/drivers/net/ethernet/broadcom/bnxt/bnxt.c
@@ -13101,9 +13101,6 @@ static int bnxt_bridge_setlink(struct net_device *dev, struct nlmsghdr *nlh,
 		if (nla_type(attr) != IFLA_BRIDGE_MODE)
 			continue;
 
-		if (nla_len(attr) < sizeof(mode))
-			return -EINVAL;
-
 		mode = nla_get_u16(attr);
 		if (mode == bp->br_mode)
 			break;
diff --git a/drivers/net/ethernet/emulex/benet/be_main.c b/drivers/net/ethernet/emulex/benet/be_main.c
index 18c2fc880d09..e8abc43a7061 100644
--- a/drivers/net/ethernet/emulex/benet/be_main.c
+++ b/drivers/net/ethernet/emulex/benet/be_main.c
@@ -4985,9 +4985,6 @@ static int be_ndo_bridge_setlink(struct net_device *dev, struct nlmsghdr *nlh,
 		if (nla_type(attr) != IFLA_BRIDGE_MODE)
 			continue;
 
-		if (nla_len(attr) < sizeof(mode))
-			return -EINVAL;
-
 		mode = nla_get_u16(attr);
 		if (BE3_chip(adapter) && mode == BRIDGE_MODE_VEPA)
 			return -EOPNOTSUPP;
diff --git a/drivers/net/ethernet/intel/ixgbe/ixgbe_main.c b/drivers/net/ethernet/intel/ixgbe/ixgbe_main.c
index 1726297f2e0d..d1381b1b3f3a 100644
--- a/drivers/net/ethernet/intel/ixgbe/ixgbe_main.c
+++ b/drivers/net/ethernet/intel/ixgbe/ixgbe_main.c
@@ -10042,9 +10042,6 @@ static int ixgbe_ndo_bridge_setlink(struct net_device *dev,
 		if (nla_type(attr) != IFLA_BRIDGE_MODE)
 			continue;
 
-		if (nla_len(attr) < sizeof(mode))
-			return -EINVAL;
-
 		mode = nla_get_u16(attr);
 		status = ixgbe_configure_bridge_mode(adapter, mode);
 		if (status)
diff --git a/drivers/net/ethernet/mellanox/mlx5/core/en_main.c b/drivers/net/ethernet/mellanox/mlx5/core/en_main.c
index defb1efccb78..b2df8e517a85 100644
--- a/drivers/net/ethernet/mellanox/mlx5/core/en_main.c
+++ b/drivers/net/ethernet/mellanox/mlx5/core/en_main.c
@@ -4883,9 +4883,6 @@ static int mlx5e_bridge_setlink(struct net_device *dev, struct nlmsghdr *nlh,
 		if (nla_type(attr) != IFLA_BRIDGE_MODE)
 			continue;
 
-		if (nla_len(attr) < sizeof(mode))
-			return -EINVAL;
-
 		mode = nla_get_u16(attr);
 		if (mode > BRIDGE_MODE_VEPA)
 			return -EINVAL;
diff --git a/drivers/net/ethernet/netronome/nfp/nfp_net_common.c b/drivers/net/ethernet/netronome/nfp/nfp_net_common.c
index 6b1fb5708434..85f36ec2f986 100644
--- a/drivers/net/ethernet/netronome/nfp/nfp_net_common.c
+++ b/drivers/net/ethernet/netronome/nfp/nfp_net_common.c
@@ -2068,9 +2068,6 @@ static int nfp_net_bridge_setlink(struct net_device *dev, struct nlmsghdr *nlh,
 		if (nla_type(attr) != IFLA_BRIDGE_MODE)
 			continue;
 
-		if (nla_len(attr) < sizeof(mode))
-			return -EINVAL;
-
 		new_ctrl = nn->dp.ctrl;
 		mode = nla_get_u16(attr);
 		if (mode == BRIDGE_MODE_VEPA)
-- 
2.17.1

Re: [PATCH net-next v1] rtnetlink: remove redundant checks for nlattr IFLA_BRIDGE_MODE

[Simon Horman]

On Wed, Jul 26, 2023 at 04:05:22PM +0800, Lin Ma wrote:
> The previous patch added the nla_len check in rtnl_bridge_setlink, which
> is the only caller for ndo_bridge_setlink handlers defined in low-level
> driver codes. Hence, this patch cleanups the redundant checks in each
> ndo_bridge_setlink handler function.
> 
> Please apply the fix discussed at the link:
> https://lore.kernel.org/all/20230726075314.1059224-1-linma@zju.edu.cn/
> first before this one.

FWIIW, the patch at the link above seems to be in net-next now.

> 
> Suggested-by: Hangbin Liu <liuhangbin@gmail.com>
> Signed-off-by: Lin Ma <linma@zju.edu.cn>

Reviewed-by: Simon Horman <horms@kernel.org>

Re: [PATCH net-next v1] rtnetlink: remove redundant checks for nlattr IFLA_BRIDGE_MODE

[Jakub Kicinski]

On Mon, 31 Jul 2023 09:16:30 +0200 Simon Horman wrote:
> > Please apply the fix discussed at the link:
> > https://lore.kernel.org/all/20230726075314.1059224-1-linma@zju.edu.cn/
> > first before this one.  
> 
> FWIIW, the patch at the link above seems to be in net-next now.

I don't think it is.. 🧐️

Re: [PATCH net-next v1] rtnetlink: remove redundant checks for nlattr IFLA_BRIDGE_MODE

[Simon Horman]

On Mon, Jul 31, 2023 at 08:54:05AM -0700, Jakub Kicinski wrote:
> On Mon, 31 Jul 2023 09:16:30 +0200 Simon Horman wrote:
> > > Please apply the fix discussed at the link:
> > > https://lore.kernel.org/all/20230726075314.1059224-1-linma@zju.edu.cn/
> > > first before this one.  
> > 
> > FWIIW, the patch at the link above seems to be in net-next now.
> 
> I don't think it is.. 🧐️

Sorry, my bad.