kernel: mptcp: ensure snd_nxt is properly initialized on connect

In the Linux kernel, the following vulnerability has been resolved: mptcp: ensure sndnxt is properly initialized on connect Christoph reported a splat hinting at a corrupted snduna: WARNING: CPU: 1 PID: 38 at net/mptcp/protocol.c:1005 mptcpcleanuna+0x4b3/0x620 net/mptcp/protocol.c:1005 Modules...