Re: [PATCH net v2] pppoe: wait for RCU readers before reusing a socket

[patchwork-bot+netdevbpf]

Hello:

This patch was applied to netdev/net.git (main)
by Paolo Abeni <pabeni@xxxxxxxxxx>:

On Mon, 26 Oct 2026 14:12:58 +0800 you wrote:
> When pppoe_connect() disconnects or reuses a socket, it removes the old
> session from the hash table and resets the socket's fields. An RCU
> reader that reached the entry before it was unlinked can still be using
> its address, ifindex or next pointer.
> 
> If sockets A and B share a hash bucket with A preceding B, a concurrent
> __get_item() looking for B can be traversing A when it is removed.
> Clearing A->next then makes the lookup miss B and drop the packet.
> Reinserting A can similarly redirect the reader into another hash chain.
> 
> [...]

Here is the summary with links:
  - [net,v2] pppoe: wait for RCU readers before reusing a socket
    https://git.kernel.org/netdev/net/c/e7b01bc0202a

You are awesome, thank you!
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