Date: Fri, 9 Feb 2018 09:33:03 +0100 From: joris dedieu <joris.dedieu@gmail.com> To: freebsd-ports <freebsd-ports@freebsd.org> Cc: delphij@freebsd.org Subject: openldap-server exit on signal 6 on 11.1 (and not in 10.3) Message-ID: <CAPd55qB06oqxjbHtF--CFs5%2B0BtGD6TGX70sxCWexsT34GMDJw@mail.gmail.com>
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Dear porters,
While moving from 10.3 to 11.1, I get an issue on openldap execution.
slapd dies (pid 29087 (slapd), uid 389: exited on signal 6) on some
complex but reproducible operations.
We worked around this bug by returning less elements from the request.
While my dear colleges are trying to write a script to reproduce the
issue, I investigate system side.
In /var/log/messages, I got slapd[4909]: stack overflow detected; terminated
The only trace I get
#0 0x0000000801f7a71a in kill () from /lib/libc.so.7
#1 0x0000000801f7a6d0 in __stack_chk_fail () from /lib/libc.so.7
#2 0x0000000801f7a640 in __stack_chk_fail () from /lib/libc.so.7
#3 0x00000000004466e6 in do_modify ()
#4 0x00000000004308d5 in connection_assign_nextid ()
#5 0x00000000004300dd in connection_read_activate ()
#6 0x0000000800956ffa in ldap_pvt_thread_pool_submit () from
/usr/local/lib/libldap_r-2.4.so.2
#7 0x0000000801c71bc5 in pthread_create () from /lib/libthr.so.3
#8 0x0000000000000000 in ?? ()
I suspect it's relative to -fstack-protector-strong which is the
default since FreeBSD 11.0. Do you think I should rebuild all the
world this opion ?
I also thought on fdatasync
.if ${OSVERSION} < 1101000
CFLAGS+= -DMDB_DSYNC=O_SYNC -Dfdatasync=fsync
.endif
I'm currently investigating on this changes.
The issue disappear when slapd is compiled with debugging symbols
(WITH_DEBUG=YES). As far as I understand, this only cause -g flag to
be added to CFLAGS. Does WITH_DEBUG also disable some compiler
optimization ?
Any thought on all this is welcomed
Joris
Openldap options :
Name : openldap-sasl-server
Version : 2.4.45_4
Installed on : Thu Feb 8 16:16:45 2018 CET
Origin : net/openldap24-server
Architecture : FreeBSD:11:amd64
Prefix : /usr/local
Categories : databases net
Licenses : OPENLDAP
Maintainer : delphij@FreeBSD.org
WWW : http://www.OpenLDAP.org/
Comment : Open source LDAP server implementation
Options :
ACCESSLOG : on
ACI : off
AUDITLOG : off
BDB : off
COLLECT : off
CONSTRAINT : off
DDS : off
DEBUG : off
DEREF : off
DNSSRV : off
DYNACL : off
DYNAMIC_BACKENDS: on
DYNGROUP : off
DYNLIST : off
FETCH : off
GSSAPI : on
KQUEUE : off
LASTBIND : off
LMPASSWD : off
MDB : on
MEMBEROF : off
ODBC : off
OUTLOOK : off
PASSWD : off
PERL : off
PPOLICY : on
PROXYCACHE : off
REFINT : off
RELAY : off
RETCODE : off
RLOOKUPS : off
RWM : off
SASL : on
SEQMOD : off
SHA2 : off
SHELL : off
SLAPI : off
SLP : off
SMBPWD : off
SOCK : off
SSSVLV : off
SYNCPROV : on
TCP_WRAPPERS : off
TRANSLUCENT : off
UNIQUE : off
VALSORT : off
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