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Date:   Sat, 01 Oct 2022 01:10:15 +0000
To:     Jakub Kicinski <>
Subject: Re: [PATCH net-next RESEND] genetlink: reject use of nlmsg_flags for new


This patch was applied to netdev/net-next.git (master)
by Jakub Kicinski <>:

On Thu, 29 Sep 2022 07:28:09 -0700 you wrote:
> Commit 9c5d03d36251 ("genetlink: start to validate reserved header bytes")
> introduced extra validation for genetlink headers. We had to gate it
> to only apply to new commands, to maintain bug-wards compatibility.
> Use this opportunity (before the new checks make it to Linus's tree)
> to add more conditions.
> Validate that Generic Netlink families do not use nlmsg_flags outside
> of the well-understood set.
> [...]

Here is the summary with links:
  - [net-next,RESEND] genetlink: reject use of nlmsg_flags for new commands

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