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Posted to dev@spamassassin.apache.org by bu...@bugzilla.spamassassin.org on 2005/01/25 23:28:33 UTC

[Bug 4103] New: Deep recursion error

http://bugzilla.spamassassin.org/show_bug.cgi?id=4103

           Summary: Deep recursion error
           Product: Spamassassin
           Version: 3.0.1
          Platform: PC
        OS/Version: Linux
            Status: NEW
          Severity: normal
          Priority: P2
         Component: Libraries
        AssignedTo: dev@spamassassin.apache.org
        ReportedBy: zuziak@math.ku.dk


This bug might be considered a denial-of-service problem.

A mail with many nested MIME messages will cause spamassassin and spamc/spamd to
consume alot of memory and CPU. Example: 180 MB memory and 21 CPU seconds on an
Intel Pentium 3, 1133MHz for a mail of about 200 kB with 122 nested MIME messages.

The problem seems to only affect SA from version 3.0. It has been observed on
3.0.1, 3.0.2 and 3.1 trunk. The problem doesn't seem to exist in 2.64.

The problem has been discussed on the users list:
http://thread.gmane.org/gmane.mail.spam.spamassassin.general/62309

Several error messages will be logged about "Deep recursion":

Jan 18 10:40:31 imf spamd[6173]: Deep recursion on subroutine
"Mail::SpamAssassin::Message::parse_body" at
/usr/lib/perl5/site_perl/5.8.5/Mail/SpamAssassin/Message.pm line 521, <GEN3284>
line 6525.
Jan 18 10:40:34 imf spamd[6173]: Deep recursion on subroutine
"Mail::SpamAssassin::Message::_do_parse" at
/usr/lib/perl5/site_perl/5.8.5/Mail/SpamAssassin/Message.pm line 242, <GEN3284>
line 6525.
Jan 18 10:40:34 imf spamd[6173]: Deep recursion on subroutine
"Mail::SpamAssassin::Message::_parse_normal" at
/usr/lib/perl5/site_perl/5.8.5/Mail/SpamAssassin/Message.pm line 446, <GEN3284>
line 6525.
Jan 18 10:40:34 imf spamd[6173]: Deep recursion on subroutine
"Mail::SpamAssassin::Message::_do_parse" at
/usr/lib/perl5/site_perl/5.8.5/Mail/SpamAssassin/Message.pm line 242, <GEN3284>
line 6525.
Jan 18 10:40:34 imf spamd[6173]: Deep recursion on subroutine
"Mail::SpamAssassin::Message::_parse_multipart" at
/usr/lib/perl5/site_perl/5.8.5/Mail/SpamAssassin/Message.pm line 437, <GEN3284>
line 6525.
Jan 18 10:40:34 imf spamd[6173]: Deep recursion on subroutine
"Mail::SpamAssassin::Message::_parse_normal" at
/usr/lib/perl5/site_perl/5.8.5/Mail/SpamAssassin/Message.pm line 446, <GEN3284>
line 6525.
Jan 18 10:40:34 imf spamd[6173]: Deep recursion on subroutine
"Mail::SpamAssassin::Message::_parse_normal" at
/usr/lib/perl5/site_perl/5.8.5/Mail/SpamAssassin/Message.pm line 446, <GEN3284>
line 6525.
Jan 18 10:40:34 imf spamd[6173]: Deep recursion on subroutine
"Mail::SpamAssassin::Message::new" at
/usr/lib/perl5/site_perl/5.8.5/Mail/SpamAssassin/Message.pm line 611, <GEN3284>
line 6525.
Jan 18 10:40:34 imf spamd[6173]: Deep recursion on subroutine
"Mail::SpamAssassin::Message::_parse_normal" at
/usr/lib/perl5/site_perl/5.8.5/Mail/SpamAssassin/Message.pm line 446, <GEN3284>
line 6525.
Jan 18 10:40:34 imf spamd[6173]: Deep recursion on subroutine
"Mail::SpamAssassin::Message::new" at
/usr/lib/perl5/site_perl/5.8.5/Mail/SpamAssassin/Message.pm line 611, <GEN3284>
line 6525.
Jan 18 10:40:37 imf spamd[6173]: Deep recursion on subroutine
"Mail::SpamAssassin::Message::Node::_find_parts" at
/usr/lib/perl5/site_perl/5.8.5/Mail/SpamAssassin/Message/Node.pm line 122,
<GEN3284> line 6525.
Jan 18 10:40:44 imf spamd[6173]: Deep recursion on subroutine
"Mail::SpamAssassin::Message::Node::_find_parts" at
/usr/lib/perl5/site_perl/5.8.5/Mail/SpamAssassin/Message/Node.pm line 122,
<GEN3284> line 6525.
Jan 18 10:40:46 imf spamd[6173]: Deep recursion on subroutine
"Mail::SpamAssassin::Message::Node::_find_parts" at
/usr/lib/perl5/site_perl/5.8.5/Mail/SpamAssassin/Message/Node.pm line 122.
Jan 18 10:40:46 imf spamd[6173]: Deep recursion on subroutine
"Mail::SpamAssassin::Message::Node::content_summary" at
/usr/lib/perl5/site_perl/5.8.5/Mail/SpamAssassin/Message/Node.pm line 460.
Jan 18 10:40:50 imf spamd[6173]: Deep recursion on subroutine
"Mail::SpamAssassin::Message::Node::finish" at
/usr/lib/perl5/site_perl/5.8.5/Mail/SpamAssassin/Message/Node.pm line 659.
Jan 18 10:41:02 imf spamd[6173]: Deep recursion on subroutine
"Mail::SpamAssassin::Message::finish" at
/usr/lib/perl5/site_perl/5.8.5/Mail/SpamAssassin/Message/Node.pm line 659.
Jan 18 10:41:02 imf spamd[6173]: Deep recursion on subroutine
"Mail::SpamAssassin::Message::finish" at
/usr/lib/perl5/site_perl/5.8.5/Mail/SpamAssassin/Message/Node.pm line 659.



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[Bug 4103] Deep recursion error

Posted by bu...@bugzilla.spamassassin.org.

http://bugzilla.spamassassin.org/show_bug.cgi?id=4103





------- Additional Comments From zuziak@math.ku.dk  2005-01-25 14:31 -------
Created an attachment (id=2625)
 --> (http://bugzilla.spamassassin.org/attachment.cgi?id=2625&action=view)
message that triggers the problem

Scanning this message with spamc/spamd or spamassassin will consume 180 MB
memory on SA 3.



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