Andreas Kling da981578e3 Kernel: Don't use a VLA for outgoing TCP packets ...

Since the payload size is user-controlled, this could be used to
overflow the kernel stack.

We should probably also be breaking things into smaller packets at a
higher level, e.g TCPSocket::protocol_send(), but let's do that as
a separate exercise.

Fixes #5310.

2021-02-12 23:00:25 +01:00

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