Re: [PATCH net v3] rtnetlink: let rtnl_bridge_setlink checks IFLA_BRIDGE_MODE length

[patchwork-bot+netdevbpf]

Hello:

This patch was applied to netdev/net.git (main)
by Jakub Kicinski <kuba@xxxxxxxxxx>:

On Wed, 26 Jul 2023 15:53:14 +0800 you wrote:
> There are totally 9 ndo_bridge_setlink handlers in the current kernel,
> which are 1) bnxt_bridge_setlink, 2) be_ndo_bridge_setlink 3)
> i40e_ndo_bridge_setlink 4) ice_bridge_setlink 5)
> ixgbe_ndo_bridge_setlink 6) mlx5e_bridge_setlink 7)
> nfp_net_bridge_setlink 8) qeth_l2_bridge_setlink 9) br_setlink.
> 
> By investigating the code, we find that 1-7 parse and use nlattr
> IFLA_BRIDGE_MODE but 3 and 4 forget to do the nla_len check. This can
> lead to an out-of-attribute read and allow a malformed nlattr (e.g.,
> length 0) to be viewed as a 2 byte integer.
> 
> [...]

Here is the summary with links:
  - [net,v3] rtnetlink: let rtnl_bridge_setlink checks IFLA_BRIDGE_MODE length
    https://git.kernel.org/netdev/net/c/d73ef2d69c0d

You are awesome, thank you!
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