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Subject: Re: [ANNOUNCEMENT] clamav 0.99.1-1
To: cygwin AT cygwin DOT com
References: <announce DOT 201603301732 DOT u2UHW4eN011967 AT int-mx11 DOT intmail DOT prod DOT int DOT phx2 DOT redhat DOT com> <6da62132-1e66-41c9-043d-c552f4faf1c3 AT redhat DOT com> <4f86f77b-e2cb-b654-760b-499623dd61a1 AT cygwin DOT com> <360d98a0-8e44-e816-ea44-d87a2e2655a4 AT redhat DOT com> <91F687B2-C7E2-444D-91C3-2FAD580955A2 AT etr-usa DOT com>
From: Mike Bonnet <mikeb AT redhat DOT com>
Message-ID: <d165fc48-cf32-6e55-9bfa-d727899dcc76@redhat.com>
Date: Fri, 13 May 2016 11:51:05 -0700
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On 5/11/16 9:14 AM, Warren Young wrote:
> On May 11, 2016, at 10:10 AM, Mike Bonnet wrote:
>>
>> On 5/11/16 8:18 AM, Yaakov Selkowitz wrote:
>>> On 2016-05-11 09:35, Mike Bonnet wrote:
>>>
>>>> Any chance we could get a new 64-bit build?
>>>
>>> We'd need to find the real cause of this before it would be of any help.
>>> I'd start with updating to 0.99.2, however we borrow Fedora's -norar
>>> sources but they haven't bumped yet (#1333949).
>>
>> I'll retry with 0.99.2 when it's available.
>
> Or you could rebuild 0.99.1 from the sources and see if that fixes the symptom.  If it does, you have a reason to reject Yaakov’s answer.  If not, Yaakov was right to disbelieve your hypothesis.

The build issue was a red herring, sorry about that. It turns out a 
specific file, xdate.exe, is causing clamscan to segfault. This is an 
old file, from 2012, used for date formatting, but it has just started 
causing problems. I've reproduced the segfault in 0.99.1-1 and 0.98.7-2 
running on Cygwin64 on Windows Server 2012, but didn't go any further 
back than that. I've verified that there are no viruses in the file 
(according to virustotal.com):

https://virustotal.com/en/file/937800ed6b0408b9dba4e4dc507cd0b1962d3adb6285947db520009d19cbe24e/analysis/1463097443/

The file is here (it's listed as "free for any use"):

http://people.redhat.com/mikeb/clamscan-segfault/xdate.exe

The output from running "clamscan --debug xdate.exe" is here:

http://people.redhat.com/mikeb/clamscan-segfault/clamscan-debug-xdate.log

and the stackdump is here:

http://people.redhat.com/mikeb/clamscan-segfault/clamscan.exe.stackdump

Sounds like this should be reported to Clamav upstream. Is anyone 
involved with Clamav already, that could report this to the right 
people, or do I need to start signing up for mailing lists? :)


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