[Bug 1750] Sftp hangs if stderr is used.

[bugzilla-daemon at bugzilla.mindrot.org]

https://bugzilla.mindrot.org/show_bug.cgi?id=1750

jchadima at redhat.com changed:

           What    |Removed                     |Added
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                 CC|                            |jchadima at redhat.com

--- Comment #2 from jchadima at redhat.com 2010-04-08 22:20:06 EST ---
(In reply to comment #1)
> When you say "session.c before version 1.237" do you mean that 1.237 is
> affected?
yes all versions from 1.237 are affected, all older aren't



 Also, are you using the version from portable OpenSSH CVS or
> from OpenBSD CVS?

portable openssh.

The problem is in this chunk of the patch:

@@ -507,6 +507,10 @@
*/
if (compat20) {
session_set_fds(s, inout[1], inout[1], s->is_subsystem ? -1 : err[1]);
+ /* close err[1] to not leak the socket if this inside a subsystem */
+ if (s->is_subsystem) {
+ close(err[1]);
+ }
} else {
server_loop(pid, inout[1], inout[1], err[1]);
/* server_loop has closed inout[1] and err[1]. */


and another one for pipes also.


the stderr is closed and any attempt to write to it causes the hang.

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