tor/changes/bug24665

  o Major bugfixes (KIST, scheduler):
    - The KIST scheduler did not correctly account for data already enqueued
      in each connection's send socket buffer, particularly in cases when the
      TCP/IP congestion window was reduced between scheduler calls. This
      situation lead to excessive per-connection buffering in the kernel, and
      a potential memory DoS. Fixes bug 24665; bugfix on 0.3.2.1-alpha.
sched: Consider extra_space even if negative in KIST With extra_space negative, it means that the "notsent" queue is quite large so we must consider that value with the current computed tcp_space. If we end up to have negative space, we should not add more data to the kernel since the notsent queue is just too filled up. Fixes #24665 Signed-off-by: David Goulet <dgoulet@torproject.org> 2017-12-19 22:20:36 +01:00			`o Major bugfixes (KIST, scheduler):`
			`- The KIST scheduler did not correctly account for data already enqueued`
			`in each connection's send socket buffer, particularly in cases when the`
			`TCP/IP congestion window was reduced between scheduler calls. This`
			`situation lead to excessive per-connection buffering in the kernel, and`
			`a potential memory DoS. Fixes bug 24665; bugfix on 0.3.2.1-alpha.`