Win2003 SP1 TS blue screens (session pool leak)

Hi,

I have a busy terminal server which has repeatedly crashed with
a STOP 0xab (SESSION_HAS_VALID_POOL_ON_EXIT) after installing SP1.

I can't reproduce it on demand, as it's caused by random users on
a live server, but I have crash dumps.


0: kd> !analyze -v
*******************************************************************************
* *
* Bugcheck Analysis *
* *
*******************************************************************************

SESSION_HAS_VALID_POOL_ON_EXIT (ab)
Caused by a session driver not freeing its pool allocations prior to a
session unload. This indicates a bug in win32k.sys, atmfd.dll,
rdpdd.dll or a video driver.
Arguments:
Arg1: 00000012, session ID
Arg2: 000001e0, number of paged pool bytes that are leaking
Arg3: 00000000, number of nonpaged pool bytes that are leaking
Arg4: 00000014, total number of paged and nonpaged allocations that are leaking.
nonpaged allocations are in the upper half of this word,
paged allocations are in the lower half of this word.


0: kd> !poolused 8
Sorting by Session Tag

Pool Used:
NonPaged Paged
Tag Allocs Used Allocs Used
Gump 0 0 20 480
TOTAL 0 0 20 480



The number of leaking allocations varies but the size of each
allocation is always 0x18 and the pool tag is "Gump" (not listed
in pooltag.txt but presumably GDI-related).

Most of our clients are rdesktop-based so there might be something
that rdesktop does wrong that contributes to the problem. If so,
feel free to point that out :) However, even if this is the case
it is still a TS bug.

Hopefully this will help someone in resolving the problem. Feel
free to contact me if you need any more information.

Thanks,
Matt
[in my capacity as a UNSW system administrator]

.

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