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From Ruediger Pluem <>
Subject Re: Segfault with fix for CVE-2009-1891
Date Thu, 30 Jul 2009 10:22:59 GMT

On 07/30/2009 10:48 AM, Stefan Fritsch wrote:
>> Right, it is not really helpful, but as you seem to be able to reproduce
>> the issue can you please create a backtrace on your own, preferably with
>> an unstripped and -g compiled php (which doesn't seem to be the case in
>> the
>> current backtrace) .
> Backtrace is attached. Looking at it again, the brigade that contains the
> transient bucket does not seem to belong to the oldwrite filter. It's the
> brigade that is used by mod_php to pass the eos bucket. But since mod_php
> only creates eos buckets and uses ap_fwrite for everything else, I don't
> know where the transient bucket comes from.

I guess this is because they reuse the brigade for sending the EOS bucket
(which is fine). They should simply cleanup this brigade before sending
the EOS bucket down the chain.



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