Re: [PATCH net] pppoe: reload header pointer after dev_hard_header()

[patchwork-bot+netdevbpf]

Hello:

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

On Wed, 22 Jul 2026 09:38:43 +0000 you wrote:
> pppoe_sendmsg() saves a pointer to the PPPoE header before calling
> dev_hard_header(). Device header callbacks are allowed to reallocate the
> skb head, invalidating pointers into it.
> 
> This can happen when a send is blocked in copy_from_user() while the first
> non-Ethernet port is added to an empty team device. The team's delegated
> GRE header callback then expands the skb head. PPPoE subsequently writes
> six bytes through the stale pointer into the freed head.
> 
> [...]

Here is the summary with links:
  - [net] pppoe: reload header pointer after dev_hard_header()
    https://git.kernel.org/netdev/net/c/e9c238f6fe42

You are awesome, thank you!
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