what means error msg in auth.log (failed to map segment..)

5 msg	postfix/ldap - can one special_result_attribute...
2 msg	mailing list goes to bulk / spam folder
9 msg	SMTP Auth on multiple instances
4 msg	Auto-response, but not vacation
4 msg	bypassing reject_rbl_client for certain recipie...
12 msg	rewritten log
11 msg	Per user SPF and Anti Virus checks
9 msg	Instance on policies
2 msg	Removing internal mailers from headers
7 msg	Open Relay issue
1 msg	Messages not picked up from active queue
3 msg	Semantics question about myorigin
22 msg	mime, header_checks question
3 msg	problem using greylist and gmail
9 msg	451 4.3.0 Error: queue file write error and vir...
5 msg	Network_biopair_interop errors

what means error msg in auth.log (failed to map...
\ Radim Roska (30 Mar 2008)

5 msg	problem upgrading from 2.4.5 to 2.5.1
5 msg	failover
13 msg	smtp_fallback_relay

Subject:	what means error msg in auth.log (failed to map segment..)
Group:	Postfix-users
From:	Radim Roska
Date:	30 Mar 2008

Hi,

have you anyone experienced problem like this ? Everything works fine..but
in auth.log i've got following messages. I've googled out, that it could be
selinux related. But i dont have enabled selinux on my debian. Anyway why
cleanup wanna use sasl libs? I thought cleanup just checks mail body,
transform it according to some rules but i doubt that would need sasl.

Mar 30 14:13:06 server postfix/cleanup[16078]: unable to dlopen
/usr/lib/sasl2/liblogin.so.2: /usr/lib/sasl2/liblogin.so.2: failed to map
segment from shared object: Operation not permitted
Mar 30 14:13:06 server postfix/cleanup[16078]: unable to dlopen
/usr/lib/sasl2/libcrammd5.so.2: /usr/lib/sasl2/libcrammd5.so.2: failed to
map segment from shared object: Operation not permitted
Mar 30 14:13:06 server postfix/cleanup[16078]: unable to dlopen
/usr/lib/sasl2/libplain.so.2: /usr/lib/sasl2/libplain.so.2: failed to map
segment from shared object: Operation not permitted
Mar 30 14:13:06 server postfix/cleanup[16078]: unable to dlopen
/usr/lib/sasl2/libntlm.so.2: /usr/lib/sasl2/libntlm.so.2: failed to map
segment from shared object: Operation not permitted
Mar 30 14:13:06 server postfix/cleanup[16078]: unable to dlopen
/usr/lib/sasl2/libsasldb.so.2: /usr/lib/sasl2/libsasldb.so.2: failed to map
segment from shared object: Operation not permitted
Mar 30 14:13:06 server postfix/cleanup[16078]: unable to dlopen
/usr/lib/sasl2/libanonymous.so.2: /usr/lib/sasl2/libanonymous.so.2: failed
to map segment from shared object: Operation not permitted
Mar 30 14:13:06 server postfix/cleanup[16078]: unable to dlopen
/usr/lib/sasl2/libdigestmd5.so.2: /usr/lib/sasl2/libdigestmd5.so.2: failed
to map segment from shared object: Operation not permitted

Thanks a lot for any hint

Radim