Description of problem:

Sshd fails if remote program generates too much output when using v2. It looks
like the code to throttle the stdout from the program being executed is
commented out in v2. So the sshd continues to allocate memory to buffer the
stdout until it hits aprox 10Mb and then it just aborts. This doesn't happen
with openssh's own client, possibly due to it's constant adjustments to the
window sizes works around it.

Version-Release number of selected component (if applicable):

All OpenSSH v2 versions at this point.

How reproducible:

Always.

Steps to Reproduce:
[see attachment]
1. Download cryptlib from http://www.cs.auckland.ac.nz/~pgut001/cryptlib/
2. Replace session/ssh2_msg.c and session/ssh2_rw.c with the ones included in
this tar file.
3. Compile cryptlib
4. Edit sshtest.c and put in your account settings and the path to the genstdout
binary
5. Compile genstdout and sshtest (see compile.sh)
6. Run sshtest
 
Actual results:

In the sshd logs you'll find:
fatal: buffer_append_space: alloc 10489856 not supported

Expected results:

The program should just continue to run until interrupted.

Additional info: