Re: [PATCH net-next v4 1/2] tcp: keep the route window metric when SO_RCVBUF is set before connect

From: Jakub Kicinski

Date: Wed Oct 21 2026 - 16:54:08 EST


On Wed, 21 Oct 2026 21:27:14 +0530 Shashank Mohan Jain wrote:
> The problem was found by code inspection, assisted by an LLM (Claude
> Code, Claude Opus 5.5), while reviewing the commit above. It was
> confirmed with a reproducer in a qemu guest (two netns joined by a veth
> pair, "ip route ... window 4096", tcpdump of the SYN and SYN-ACK, and
> TCP_INFO of both ends, including a SYN cookie case), and with the
> packetdrill tests added by the next patch, which fail without this
> patch and pass with it.

Sounds like a genuine net-next material. Please drop the Fixes tag
completely, and repost after net-next reopens

If someone disagrees please speak up.


## Form letter - net-next-closed

The merge window for Linux v7.4 has begun, and the net-next
tree is now closed for new drivers, features, code refactoring
and optimizations. We are currently accepting bug fixes only.

Please repost when net-next reopens. There is some uncertainty
about how long this merge window will last, so please check
https://netdev.bots.linux.dev/net-next.html
before reposting. net-next _may_ reopen on Nov 2nd.

See: https://www.kernel.org/doc/html/next/process/maintainer-netdev.html#development-cycle
--
pw-bot: defer