Matthieu Baerts

### Description If servers set the C flag (deny MPJ to the initial address+port) in their `MP_CAPABLE`, clients will likely not use their other endpoints. This supposes clients are using...

flags: define "implicit"

1

Mainly to add a comment about that: it cannot be set from the userspace, so it should not be used in path-managers. Suggested-by: @sskras

Only happened once on top of `export/20251205T155419`, but with a reproducer. ``` UDPLite: UDP-Lite is deprecated and scheduled to be removed in 2025, please contact the netdev mailing list UDPLite6:...

Only happened once on top of `export/20251205T155419` with no reproducers: ``` TCP: TCP_TX_DELAY enabled random: crng reseeded on system resumption Restarting kernel threads ... Done restarting kernel threads. ================================================================== BUG:...

[syzkaller] WARNING in `skb_try_coalesce`

9

This is not a new issue, I got it ~once a month from April, and it was with TCP only, e.g. ``` sock: sock_set_timeout: `syz.0.792' (pid 5239) tries to set...

KMemLeak: from `mptcp_sk_clone_init()`

6

Our CI just [reported](https://github.com/multipath-tcp/mptcp_net-next/actions/runs/17484970392) this potential leak: ``` unreferenced object 0xffff888119d90c80 (size 3032): comm "packetdrill", pid 31258, jiffies 4299819414 hex dump (first 32 bytes): 7f 00 00 06 7f 00...

mptcp: avoid dropping partial packets

1

A recent commit from Paolo was trying to avoid dropping partial packets, see commit 1d2ce718811ac0c5ebc3d3a6964bd1cadc13ad38 ("mptcp: do not drop partial packets"). Unfortunately, this had to be reverted, because it was...

[syzbot] possible deadlock in `mptcp_subflow_create_socket`: `nbd` has a lockdep dependency between `reclaim` and `af_socket`

1

Hello, syzbot found the following issue on: * HEAD commit: 262858079afd Add linux-next specific files for 20250926 * git tree: linux-next * console output: https://syzkaller.appspot.com/x/log.txt?x=14f88942580000 * kernel config: https://syzkaller.appspot.com/x/.config?x=997066872b7941b6 *...

### Pre-requisites - [x] A similar [idea](https://github.com/multipath-tcp/mptcp_net-next/issues?q=label%3Aenhancement) has not been reported before. - [x] [mptcp.dev](https://www.mptcp.dev) website does not cover my case. - [x] The [wiki](https://github.com/multipath-tcp/mptcp_net-next/wiki) doesn't cover my case. ###...

[syzkaller] improve coverage

2

It would be good to improve the code coverage. According to [syzbot](https://syzkaller.appspot.com/upstream/coverage?period=month&subsystem=mptcp), today we have: Improvements can be done in: - fastopen - syncookies - bpf - pm_userspace - multiple...