[clamav-users] Error: CRITICAL: fmap() failed

[Ben Stuyts]

Hello,

I found a file that is causing this:

# clamscan a
LibClamAV Warning: fmap: failed to get MD5
LibClamAV Error: CRITICAL: fmap() failed
/tmp/a: Can't allocate memory ERROR

top says:
Mem: 2393M Active, 4926M Inact, 152K Laundry, 8602M Wired, 1990M Free
Swap: 16G Total, 1892M Used, 14G Free, 11% Inuse

File ‘a’ is a 4.1 GB mbox file. This is a 64-bit FreeBSD system. So is ClamAV trying to mmap that whole file into memory? I can’t find any options to change this behaviour.

There are some bugzilla reports here, but it’s still open:
https://bugzilla.clamav.net/show_bug.cgi?id=10971 <https://bugzilla.clamav.net/show_bug.cgi?id=10971>
https://bugzilla.clamav.net/show_bug.cgi?id=12661 <https://bugzilla.clamav.net/show_bug.cgi?id=12661>

Ben


> On 11 Mar 2021, at 13:48, Ben Stuyts <ben at altesco.nl> wrote:
> 
> Thanks Jim, I’ll try this.
> 
> Ben
> 
> 
>> On 11 Mar 2021, at 13:10, Jim Simmons via clamav-users <clamav-users at lists.clamav.net> wrote:
>> 
>> Use "-o" instead of "--infected" and then you'll proably want to filter out
>> any messages that end in ": Empty file" or ": Symbolic link".
>> 
>> Jim
>> 
>> On Thu, Mar 11, 2021 at 12:28:49PM +0100, Ben Stuyts wrote:
>>> Hello,
>>> 
>>> I’m running a daily clamscan on my home directories, and lately I get this error message:
>>> 
>>> LibClamAV Warning: fmap: failed to get MD5
>>> LibClamAV Error: CRITICAL: fmap() failed
>>> 
>>> I can’t figure out what file clamav is having trouble with. The command I use is:
>>> 
>>> /usr/bin/find [...] -print0 | xargs -0 /usr/local/bin/clamscan --infected --no-summary --official-db-only=yes
>>> 
>>> Versions:
>>> 
>>> Clam AntiVirus: Scanner 0.103.1
>>> Running on FreeBSD 12.2-RELEASE-p3 GENERIC amd64
>>> 
>>> Any ideas?
>>> 
>>> Ben
>>> 
>>> 
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>>> 
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>>> 
>>> 
>>> Help us build a comprehensive ClamAV guide:
>>> https://github.com/vrtadmin/clamav-faq
>>> 
>>> http://www.clamav.net/contact.html#ml
>> 
>> _______________________________________________
>> 
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>> clamav-users at lists.clamav.net
>> https://lists.clamav.net/mailman/listinfo/clamav-users
>> 
>> 
>> Help us build a comprehensive ClamAV guide:
>> https://github.com/vrtadmin/clamav-faq
>> 
>> http://www.clamav.net/contact.html#ml
>> 
> 
> 
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> 
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> 
> 
> Help us build a comprehensive ClamAV guide:
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> 
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> 

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