Re: [PATCH net] net: bridge: netlink: do not clear the vlan info dump error

[Linkui Xiao]

Hi,

Thanks for the notice. Please find the missing information below.

On 2026/10/27 16:55, netdev-bot+sinfo@xxxxxxxxxx wrote:
> Hi!
>
> This is an automated message. This series looks like a fix, but its
> commit messages seem to be missing some information:
>
>   - Whether the issue was actually triggered, or is only theoretical
>     (e.g. found by code inspection). If it was triggered please include
>     the symptoms, like the stack trace or error messages.
>
> Please do not repost the series just to address the above. Instead,
> reply to this email with the missing information, so that reviewers
> can take it into account. If the series needs another revision for
> other reasons, please include the information in the commit messages
> then.
>
> The evaluation is done by an LLM so it may be wrong, if you think
> that is the case please reply and explain.

How the issue was discovered: Found during Sashiko AI review of the 
bridge netlink code. The review identified that 
br_fill_vlan_tunnel_info() could overwrite a previous -EMSGSIZE error 
from br_fill_ifvlaninfo*() when the port has no VLAN-to-tunnel mapping. 
The relevant review comment is already referenced in the commit message 
via the Link: tag.

Whether the issue was actually triggered: Not triggered at runtime. This 
is a theoretical error-path issue found by code inspection/AI review, 
not by syzbot, a static analysis tool scan, or a production report. No 
stack trace or error message was observed, and no test case was written 
to reproduce it.

Testing: The change was compile-tested only. No hardware or runtime test 
was performed, as reproducing the exact -EMSGSIZE + no-tunnel-mapping 
combination requires a specific skb size boundary that was not constructed.

If a v2 is needed for other review reasons, I will include this 
information in the commit messages.

Thanks,
Linkui Xiao