[Bug 2573] dead sessions cannot be closed with ~.

[bugzilla-daemon at mindrot.org]

https://bugzilla.mindrot.org/show_bug.cgi?id=2573

Darren Tucker <dtucker at dtucker.net> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Blocks|                            |3302

--- Comment #9 from Christoph Anton Mitterer <calestyo at scientia.net> ---
Hey.

Anything new with respect to this?

Actually I think this bug can cause accidental problems, consider the
following:

- one has such a hanging ssh connection (not knowing it)
- one copy&pastes a command into that terminal like
  rm -rf something
- one notices the session is dead, tries to kill it with "~.", which
doesn't work
- one kills the ssh proccess

but what happens now is, that all stuff that was entered before is then
on the shell's stdin (i.e. the shell from which ssh was invoked).
So instead of a remote rm -rf something, this is done locally... which
might be bad of course.


Cheers,
Chris

--- Comment #10 from Darren Tucker <dtucker at dtucker.net> ---
Damien has come up with a potential solution, I'm just running it
through the regress tests now.

BTW an slightly easier testcase: start an sshd in debug mode
(/path/to/sshd -ddd -p 2222), ssh into it with rekeying (ssh -o
rekeylimit="1G 15s" -vvv localhost), CTRL-Z the sshd then wait until
the client tries to rekey.


Referenced Bugs:

https://bugzilla.mindrot.org/show_bug.cgi?id=3302
[Bug 3302] Tracking bug for openssh-8.7
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