[Bug 1384] client hangs against server lacking common channel requests

bugzilla-daemon at bugzilla.mindrot.org bugzilla-daemon at bugzilla.mindrot.org
Thu May 8 23:12:21 EST 2008


https://bugzilla.mindrot.org/show_bug.cgi?id=1384





--- Comment #1 from Damien Miller <djm at mindrot.org>  2008-05-08 23:12:18 ---
A fix for this bug has been committed and will be in OpenSSH 5.1:


> CVSROOT:        /cvs
> Module name:    src
> Changes by:     djm at cvs.openbsd.org     2008/05/08 07:06:11
> 
> Modified files:
>         usr.bin/ssh    : clientloop.c clientloop.h ssh.c
> 
> Log message:
> Use new channel status confirmation callback system to properly deal
> with "important" channel requests that fail, in particular command exec,
> shell and subsystem requests. Previously we would optimistically assume
> that the requests would always succeed, which could cause hangs if they
> did not (e.g. when the server runs out of fds) or were unimplemented by
> the server (bz #1384)
> 
> Also, properly report failing multiplex channel requests via the mux
> client stderr (subject to LogLevel in the mux master) - better than
> silently failing.
> 
> most bits ok markus@ (as part of a larger diff)

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