On Sat, 13 Nov 2021, Damien Miller wrote:

> On Thu, 11 Nov 2021, Damien Miller wrote:
> 
> > Hi,
> > 
> > Snaps is now carrying a change to ssh/sshd that converts their
> > mainloops from select(2) to poll/ppoll(2). This change should be
> > completely transparent, but please be on the lookout for any weird
> > behaviour. Bugs in the revised mainloop are most likely to appear
> > as crashes, hangs or ssh/sshd using lots of CPU when idle.
> > 
> > Please report anything you see here, to openssh@ or to me.
> 
> FYI this has gone through one interation of bugfixes since it first went
> in. If you are running a snap from yesterday and experience problems then
> please upgrade to a newer one and retest.

Another couple of fixes in tomorrow's snaps. One to avoid errors like:

> channel 3: chan_read_failed for istate 3

Another avoids a situation where sshd could get stuck spinning on poll()
if it fails.

(Both uncovered by web browsing through a SOCKS dynamic forwarder)

-d

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