Re: [PATCH net v2 0/1] net: l2tp: do not propagate multicast notification errors

[patchwork-bot+netdevbpf@kernel.org]

Hello:

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

On Thu, 20 Aug 2026 18:40:27 +0000 you wrote:
> Hi Linux kernel maintainers,
> 
> We found and validated a issue in net/l2tp/l2tp_netlink.c. The bug is reachable by a
> non-root user via user and net namespace.
> The failure is observed on the unpatched kernel, not theoretical: the original PoC
> returned ENOBUFS after publishing live objects and then accumulated sessions.
> Here, that reachability statement refers to the finite state-commit trigger;
> the OOM transcript below is a separate root initramfs leak-mode run (UID 0,
> PID 1) used to make the leak and panic deterministic.
> We've tested it, and it should not affect any other functionality.
> Regression coverage includes the root namespace and an unprivileged user/net
> namespace, with notification-queue pressure and successful ACK paths for all
> three state-changing PoC commands; tunnel_modify was reviewed as a
> notification-only command path but was not a separate PoC trigger.
> No broader regression suite was run.
> The finite fixed-kernel runs returned ACK success for all three state-changing
> PoC commands in both namespaces. The leak run returned ENOBUFS and reached OOM
> after 41984 hidden Ethernet sessions.
> 
> [...]

Here is the summary with links:
  - [net,v2,1/1] net: l2tp: do not propagate multicast notification errors
    https://git.kernel.org/netdev/net/c/af20e269f745

You are awesome, thank you!
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