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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> <d165fc48-cf32-6e55-9bfa-d727899dcc76 AT redhat DOT com>
From: Yaakov Selkowitz <yselkowitz AT cygwin DOT com>
Message-ID: <0e5a6d56-ce89-8e9c-ae07-48e092927bc7@cygwin.com>
Date: Fri, 13 May 2016 17:14:37 -0500
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On 2016-05-13 13:51, Mike Bonnet wrote:
> 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.

Mike,

Thanks for narrowing this down to a test case.

I was able to reproduce this too on both Windows 7 (sporadically) and 
Server 2012 (consistently), but only after updating the "daily" 
signatures from 21513 to 21539.  Upgrading to 0.99.2 locally did not 
help, but disabling bytecode (e.g. --bytecode=no in CLI) seems to be a 
workaround.

Therefore, I suspect its either a bug in LLVM JIT (certainly possible) 
or in register handling in Cygwin.  Either way, it's going to be some 
"fun" to track this down further.

> 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? :)

There is a bugzilla, but I suspect this will have to be fixed on our end 
somewhere.

-- 
Yaakov

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