Re: group query regression?

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From: Philippe Serbruyns <Philippe.Serbruyns [at] UGent.be>
To: Arthur de Jong <arthur [at] arthurdejong.org>
Cc: nss-pam-ldapd-users [at] lists.arthurdejong.org
Subject: Re: group query regression?
Date: Mon, 22 Aug 2016 13:13:47 +0200 (CEST)

Hi Arthur
Sorry for my delay of the extra debug output. I included it underneath.

1) It started failing when we used version 0.9.3, so all other olderversions with the current setup where working with referral! So, if yousay there is a bug in OpenLDAP, that means you triggered something fromversion 0.9.3 onwards. It would be could to examine the difference inreferral between those to versions.

2) the version of OpenLDAP we use is 2.4.42+dfsg-2ubuntu3.1 from Ubuntu16.04.1

3) Just to make sure to everybody else, putting "referrals no" innslcd.conf doesn't produce this bug and we can get group query's again.


Thank you for your support.

--
Met vriendelijke groet/Kind regards
Philippe Serbruyns
IT-manager TELIN

Department for Telecommunications and Information Processing (TELIN)
Ghent University     St-Pietersnieuwstraat 41,  B-9000 Gent, Belgium
Philippe.Serbruyns [at] UGent.be       https://telin.ugent.be/~ps/
tel:+32-9-264-8909                     https://twitter.com/phiser678

On Wed, 3 Aug 2016, Arthur de Jong wrote:

On Tue, 2016-08-02 at 14:12 +0200, Philippe Serbruyns wrote:

This is the log you've asked.


Thanks, can you retry with the libldap-2.4-2-dbg package installed?

My guess at this point on what seems to be leading up to the crash:

- set up normal connection, start a search and save the LDAP *ld
  handle so we can iterate over the results
- at some point libldap does a rebind because we used
  ldap_set_rebind_proc() asked it to chase referrals
- this probably results in a different LDAP *ld
- the results are still gathered with the first LDAP *ld which seems
  to work (I think it is also pretty difficult to get the second
  LDAP *ld in scope there)
- some error happens on the second connection (probably the unsupported
  control) and we call ldap_abandon() using the first LDAP *ld (the
  one we were also using to get the results from) and the original
  msgid we got from ldap_search_ext()

Since we are using the msgid and LDAP *ld from the first connection the
principle of least surprise would be that this also would mean we would
need to call ldap_abandon() with those. I would think this is a bug in
OpenLDAP.

Anyway, for completeness, could you also include the exact version
of libldap-2.4-2 (for Ubuntu 16.04 it should probably be 2.4.42+dfsg-
2ubuntu3).

Thanks,

--
-- arthur - arthur@arthurdejong.org - http://arthurdejong.org/ --


GNU gdb (Ubuntu 7.11.1-0ubuntu1~16.04) 7.11.1
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For help, type "help".
Type "apropos word" to search for commands related to "word"...
Reading symbols from nslcd/nslcd...done.
(gdb) r -d
Starting program: /root/nss-pam-ldapd-0.9.6/nslcd/nslcd -d
[Thread debugging using libthread_db enabled]
Using host libthread_db library "/lib/x86_64-linux-gnu/libthread_db.so.1".
nslcd: DEBUG: NSS_LDAP nss-pam-ldapd 0.9.6
nslcd: DEBUG: ldap_set_option(LDAP_OPT_X_TLS_REQUIRE_CERT,never)
nslcd: DEBUG: CFG: threads 5
nslcd: DEBUG: CFG: uid nslcd
nslcd: DEBUG: CFG: gid 131
nslcd: DEBUG: CFG: uri ldap://samba4server/
nslcd: DEBUG: CFG: ldap_version 3
nslcd: DEBUG: CFG: binddn cn=nslcd-connect,cn=Users,dc=mydomain
nslcd: DEBUG: CFG: bindpw ***
nslcd: DEBUG: CFG: base dc=mydomain
nslcd: DEBUG: CFG: scope sub
nslcd: DEBUG: CFG: deref never
nslcd: DEBUG: CFG: referrals yes
nslcd: DEBUG: CFG: filter aliases (objectClass=nisMailAlias)
nslcd: DEBUG: CFG: filter ethers (objectClass=ieee802Device)
nslcd: DEBUG: CFG: filter group (objectClass=posixGroup)
nslcd: DEBUG: CFG: filter hosts (objectClass=ipHost)
nslcd: DEBUG: CFG: filter netgroup (objectClass=nisNetgroup)
nslcd: DEBUG: CFG: filter networks (objectClass=ipNetwork)
nslcd: DEBUG: CFG: filter passwd (objectClass=posixAccount)
nslcd: DEBUG: CFG: filter protocols (objectClass=ipProtocol)
nslcd: DEBUG: CFG: filter rpc (objectClass=oncRpc)
nslcd: DEBUG: CFG: filter services (objectClass=ipService)
nslcd: DEBUG: CFG: filter shadow (objectClass=shadowAccount)
nslcd: DEBUG: CFG: map group userPassword "*"
nslcd: DEBUG: CFG: map passwd userPassword "*"
nslcd: DEBUG: CFG: map passwd gecos "${gecos:-$cn}"
nslcd: DEBUG: CFG: map passwd homeDirectory unixHomeDirectory
nslcd: DEBUG: CFG: map shadow userPassword "*"
nslcd: DEBUG: CFG: map shadow shadowLastChange "${shadowLastChange:--1}"
nslcd: DEBUG: CFG: map shadow shadowMin "${shadowMin:--1}"
nslcd: DEBUG: CFG: map shadow shadowMax "${shadowMax:--1}"
nslcd: DEBUG: CFG: map shadow shadowWarning "${shadowWarning:--1}"
nslcd: DEBUG: CFG: map shadow shadowInactive "${shadowInactive:--1}"
nslcd: DEBUG: CFG: map shadow shadowExpire "${shadowExpire:--1}"
nslcd: DEBUG: CFG: map shadow shadowFlag "${shadowFlag:-0}"
nslcd: DEBUG: CFG: bind_timelimit 10
nslcd: DEBUG: CFG: timelimit 0
nslcd: DEBUG: CFG: idle_timelimit 60
nslcd: DEBUG: CFG: reconnect_sleeptime 1
nslcd: DEBUG: CFG: reconnect_retrytime 10
nslcd: DEBUG: CFG: ssl off
nslcd: DEBUG: CFG: tls_reqcert never
nslcd: DEBUG: CFG: pagesize 0
nslcd: DEBUG: CFG: nss_min_uid 600
nslcd: DEBUG: CFG: nss_nested_groups no
nslcd: DEBUG: CFG: nss_getgrent_skipmembers no
nslcd: DEBUG: CFG: nss_disable_enumeration no
nslcd: DEBUG: CFG: validnames /^[a-z0-9._@$()]([a-z0-9._@$() 
\~-]*[a-z0-9._@$()~-])?$/i
nslcd: DEBUG: CFG: ignorecase no
nslcd: DEBUG: CFG: pam_password_prohibit_message "Not implemented, use 
samba-tool"
nslcd: DEBUG: CFG: cache dn2uid 15m 15m
nslcd: version 0.9.6 starting
nslcd: DEBUG: initgroups("nslcd",131) done
nslcd: DEBUG: setgid(131) done
nslcd: DEBUG: setuid(125) done
nslcd: accepting connections
[New Thread 0x7ffff2ec6700 (LWP 16563)]
[New Thread 0x7ffff26c5700 (LWP 16564)]
[New Thread 0x7ffff1ec4700 (LWP 16565)]
[New Thread 0x7ffff16c3700 (LWP 16566)]
[New Thread 0x7ffff0ec2700 (LWP 16567)]
nslcd: [8b4567] DEBUG: connection from pid=16568 uid=0 gid=0
nslcd: DEBUG: accept() failed (ignored): Resource temporarily unavailable
nslcd: [8b4567] <group="group1"> DEBUG: myldap_search(base="dc=mydomain", 
filter="(&(objectClass=posixGroup)(cn=group1))")
nslcd: DEBUG: accept() failed (ignored): Resource temporarily unavailable
nslcd: [8b4567] <group="group1"> DEBUG: ldap_initialize(ldap://samba4server/)
nslcd: [8b4567] <group="group1"> DEBUG: ldap_set_rebind_proc()
nslcd: [8b4567] <group="group1"> DEBUG: 
ldap_set_option(LDAP_OPT_PROTOCOL_VERSION,3)
nslcd: [8b4567] <group="group1"> DEBUG: ldap_set_option(LDAP_OPT_DEREF,0)
nslcd: [8b4567] <group="group1"> DEBUG: ldap_set_option(LDAP_OPT_TIMELIMIT,0)
nslcd: [8b4567] <group="group1"> DEBUG: ldap_set_option(LDAP_OPT_TIMEOUT,0)
nslcd: [8b4567] <group="group1"> DEBUG: 
ldap_set_option(LDAP_OPT_NETWORK_TIMEOUT,0)
nslcd: [8b4567] <group="group1"> DEBUG: 
ldap_set_option(LDAP_OPT_REFERRALS,LDAP_OPT_ON)
nslcd: [8b4567] <group="group1"> DEBUG: 
ldap_set_option(LDAP_OPT_RESTART,LDAP_OPT_ON)
nslcd: [8b4567] <group="group1"> DEBUG: 
ldap_simple_bind_s("cn=nslcd-connect,cn=Users,dc=mydomain","***") (uri="ldap://samba4server/";)
nslcd: [8b4567] <group="group1"> DEBUG: ldap_result(): 
CN=group1,OU=Groups,DC=mydomain
nslcd: [8b4567] <group="group1"> DEBUG: rebinding to 
ldap://samba4server/CN=Configuration,DC=mydomain
nslcd: [8b4567] <group="group1"> DEBUG: 
ldap_simple_bind_s("cn=nslcd-connect,cn=Users,dc=mydomain","***") 
(uri="ldap://samba4server/CN=Configuration,DC=mydomain";)
nslcd: [8b4567] <group="group1"> ldap_result() failed: Can't contact LDAP 
server: Connection reset by peer
nslcd: [8b4567] <group="group1"> DEBUG: ldap_abandon()
nslcd: ../../../../libraries/liblber/io.c:222: ber_flush2: Assertion `sb != 
NULL' failed.

Thread 2 "nslcd" received signal SIGABRT, Aborted.
[Switching to Thread 0x7ffff2ec6700 (LWP 16563)]
0x00007ffff71c2418 in __GI_raise (sig=sig@entry=6) at 
../sysdeps/unix/sysv/linux/raise.c:54
54      ../sysdeps/unix/sysv/linux/raise.c: No such file or directory.
(gdb) thread apply all bt full

Thread 6 (Thread 0x7ffff0ec2700 (LWP 16567)):
#0  0x00007ffff7289d13 in select () at ../sysdeps/unix/syscall-template.S:84
No locals.
#1  0x000000000040508a in worker (arg=<optimized out>) at nslcd.c:548
        __cancel_buf = {__cancel_jmp_buf = {{__cancel_jmp_buf = {0, 
-6750688455324364415, 0, 140737488347807, 140737235397056, 0,
                6750716921369301377, -6750689007467523711}, __mask_was_saved = 
0}}, __pad = {0x7ffff0ec1f30, 0x0, 0x0, 0x0}}
        __cancel_routine = 0x404fa0 <worker_cleanup>
        __cancel_arg = <optimized out>
        __not_first_call = <optimized out>
        session = <optimized out>
        csock = <optimized out>
        j = <optimized out>
        addr = {ss_family = 0, __ss_align = 0, __ss_padding = '\000' <repeats 111 
times>}
        alen = 128
        fds = {fds_bits = {32, 0 <repeats 15 times>}}
        tv = {tv_sec = 59, tv_usec = 977927}
#2  0x00007ffff755d6fa in start_thread (arg=0x7ffff0ec2700) at 
pthread_create.c:333
        __res = <optimized out>
        pd = 0x7ffff0ec2700
        now = <optimized out>
        unwind_buf = {cancel_jmp_buf = {{jmp_buf = {140737235396352, 
-6750688455324364415, 0, 140737488347807, 140737235397056,
                0, 6750716921300095361, 6750704760387899777}, mask_was_saved = 
0}}, priv = {pad = {0x0, 0x0, 0x0, 0x0}, data = {
              prev = 0x0, cleanup = 0x0, canceltype = 0}}}
        not_first_call = <optimized out>
        pagesize_m1 = <optimized out>
        sp = <optimized out>
        freesize = <optimized out>
        __PRETTY_FUNCTION__ = "start_thread"
#3  0x00007ffff7293b5d in clone () at 
../sysdeps/unix/sysv/linux/x86_64/clone.S:109
No locals.

Thread 5 (Thread 0x7ffff16c3700 (LWP 16566)):
#0  0x00007ffff7289d13 in select () at ../sysdeps/unix/syscall-template.S:84
No locals.
#1  0x000000000040508a in worker (arg=<optimized out>) at nslcd.c:548
        __cancel_buf = {__cancel_jmp_buf = {{__cancel_jmp_buf = {0, 
-6750688455324364415, 0, 140737488347807, 140737243789760, 0,
                6750718019270316417, -6750689007467523711}, __mask_was_saved = 
0}}, __pad = {0x7ffff16c2f30, 0x0, 0x0, 0x0}}
        __cancel_routine = 0x404fa0 <worker_cleanup>
        __cancel_arg = <optimized out>
        __not_first_call = <optimized out>
        session = <optimized out>
        csock = <optimized out>
        j = <optimized out>
        addr = {ss_family = 0, __ss_align = 0, __ss_padding = '\000' <repeats 111 
times>}
        alen = 128
        fds = {fds_bits = {32, 0 <repeats 15 times>}}
        tv = {tv_sec = 59, tv_usec = 977976}
#2  0x00007ffff755d6fa in start_thread (arg=0x7ffff16c3700) at 
pthread_create.c:333
        __res = <optimized out>
        pd = 0x7ffff16c3700
        now = <optimized out>
        unwind_buf = {cancel_jmp_buf = {{jmp_buf = {140737243789056, 
-6750688455324364415, 0, 140737488347807, 140737243789760,
                0, 6750718019201110401, 6750704760387899777}, mask_was_saved = 
0}}, priv = {pad = {0x0, 0x0, 0x0, 0x0}, data = {
              prev = 0x0, cleanup = 0x0, canceltype = 0}}}
        not_first_call = <optimized out>
        pagesize_m1 = <optimized out>
        sp = <optimized out>
        freesize = <optimized out>
        __PRETTY_FUNCTION__ = "start_thread"
#3  0x00007ffff7293b5d in clone () at 
../sysdeps/unix/sysv/linux/x86_64/clone.S:109
No locals.

Thread 4 (Thread 0x7ffff1ec4700 (LWP 16565)):
#0  0x00007ffff7289d13 in select () at ../sysdeps/unix/syscall-template.S:84
No locals.
#1  0x000000000040508a in worker (arg=<optimized out>) at nslcd.c:548
        __cancel_buf = {__cancel_jmp_buf = {{__cancel_jmp_buf = {0, 
-6750688455324364415, 0, 140737488347807, 140737252182464, 0,
                6750719119318815105, -6750689007467523711}, __mask_was_saved = 
0}}, __pad = {0x7ffff1ec3f30, 0x0, 0x0, 0x0}}
        __cancel_routine = 0x404fa0 <worker_cleanup>
        __cancel_arg = <optimized out>
        __not_first_call = <optimized out>
        session = <optimized out>
        csock = <optimized out>
        j = <optimized out>
        addr = {ss_family = 0, __ss_align = 0, __ss_padding = '\000' <repeats 111 
times>}
        alen = 0
        fds = {fds_bits = {32, 0 <repeats 15 times>}}
        tv = {tv_sec = 55, tv_usec = 879172}
#2  0x00007ffff755d6fa in start_thread (arg=0x7ffff1ec4700) at 
pthread_create.c:333
        __res = <optimized out>
        pd = 0x7ffff1ec4700
        now = <optimized out>
        unwind_buf = {cancel_jmp_buf = {{jmp_buf = {140737252181760, 
-6750688455324364415, 0, 140737488347807, 140737252182464,
                0, 6750719119249609089, 6750704760387899777}, mask_was_saved = 
0}}, priv = {pad = {0x0, 0x0, 0x0, 0x0}, data = {
              prev = 0x0, cleanup = 0x0, canceltype = 0}}}
        not_first_call = <optimized out>
        pagesize_m1 = <optimized out>
        sp = <optimized out>
        freesize = <optimized out>
        __PRETTY_FUNCTION__ = "start_thread"
#3  0x00007ffff7293b5d in clone () at 
../sysdeps/unix/sysv/linux/x86_64/clone.S:109
No locals.

Thread 3 (Thread 0x7ffff26c5700 (LWP 16564)):
#0  0x00007ffff7289d13 in select () at ../sysdeps/unix/syscall-template.S:84
No locals.
#1  0x000000000040508a in worker (arg=<optimized out>) at nslcd.c:548
        __cancel_buf = {__cancel_jmp_buf = {{__cancel_jmp_buf = {0, 
-6750688455324364415, 0, 140737488347807, 140737260575168, 0,
                6750711421126807937, -6750689007467523711}, __mask_was_saved = 
0}}, __pad = {0x7ffff26c4f30, 0x0, 0x0, 0x0}}
        __cancel_routine = 0x404fa0 <worker_cleanup>
        __cancel_arg = <optimized out>
        __not_first_call = <optimized out>
        session = <optimized out>
        csock = <optimized out>
        j = <optimized out>
        addr = {ss_family = 0, __ss_align = 0, __ss_padding = '\000' <repeats 111 
times>}
        alen = 0
        fds = {fds_bits = {32, 0 <repeats 15 times>}}
        tv = {tv_sec = 55, tv_usec = 879007}
#2  0x00007ffff755d6fa in start_thread (arg=0x7ffff26c5700) at 
pthread_create.c:333
        __res = <optimized out>
        pd = 0x7ffff26c5700
        now = <optimized out>
        unwind_buf = {cancel_jmp_buf = {{jmp_buf = {140737260574464, 
-6750688455324364415, 0, 140737488347807, 140737260575168,
                0, 6750711421057601921, 6750704760387899777}, mask_was_saved = 
0}}, priv = {pad = {0x0, 0x0, 0x0, 0x0}, data = {
              prev = 0x0, cleanup = 0x0, canceltype = 0}}}
        not_first_call = <optimized out>
        pagesize_m1 = <optimized out>
        sp = <optimized out>
        freesize = <optimized out>
        __PRETTY_FUNCTION__ = "start_thread"
#3  0x00007ffff7293b5d in clone () at 
../sysdeps/unix/sysv/linux/x86_64/clone.S:109
No locals.

Thread 2 (Thread 0x7ffff2ec6700 (LWP 16563)):
#0  0x00007ffff71c2418 in __GI_raise (sig=sig@entry=6) at 
../sysdeps/unix/sysv/linux/raise.c:54
        resultvar = 0
        pid = 16559
        selftid = 16563
#1  0x00007ffff71c401a in __GI_abort () at abort.c:89
        save_stage = 2
        act = {__sigaction_handler = {sa_handler = 0x4, sa_sigaction = 0x4}, 
sa_mask = {__val = {140737152811040, 4060,
              140737268958784, 459561500678, 140737354092544, 140737349756146, 
222, 140737349756360, 140737152868912, 3,
              140737339525820, 140737340623400, 140737340637040, 0, 
140737340623400, 140737349756146}}, sa_flags = -134262784,
          sa_restorer = 0x7ffff7bd24f2}
        sigs = {__val = {32, 0 <repeats 15 times>}}
#2  0x00007ffff71babd7 in __assert_fail_base (fmt=<optimized out>, 
assertion=assertion@entry=0x7ffff7bd24f2 "sb != NULL",
    file=file@entry=0x7ffff7bd23f8 "../../../../libraries/liblber/io.c", 
line=line@entry=222,
    function=function@entry=0x7ffff7bd25c8 <__PRETTY_FUNCTION__.7657> 
"ber_flush2") at assert.c:92
        str = 0x7fffec00e050 ""
        total = 4096
#3  0x00007ffff71bac82 in __GI___assert_fail (assertion=assertion@entry=0x7ffff7bd24f2 
"sb != NULL",
    file=file@entry=0x7ffff7bd23f8 "../../../../libraries/liblber/io.c", 
line=line@entry=222,
    function=function@entry=0x7ffff7bd25c8 <__PRETTY_FUNCTION__.7657> 
"ber_flush2") at assert.c:101
No locals.
#4  0x00007ffff7bce0d2 in ber_flush2 (sb=<optimized out>, ber=<optimized out>, 
freeit=freeit@entry=3)
    at ../../../../libraries/liblber/io.c:222
        towrite = <optimized out>
        rc = <optimized out>
        __PRETTY_FUNCTION__ = "ber_flush2"
#5  0x00007ffff798f2b4 in do_abandon (ld=ld@entry=0x7fffec002050, 
origid=origid@entry=2, msgid=3, sctrls=sctrls@entry=0x0,
    sendabandon=<optimized out>, sendabandon@entry=1) at abandon.c:270
        ber = <optimized out>
        i = 9
        err = <optimized out>
        sb = <optimized out>
        lr = <optimized out>
        __PRETTY_FUNCTION__ = "do_abandon"
#6  0x00007ffff798f02d in do_abandon (ld=ld@entry=0x7fffec002050, 
origid=origid@entry=2, msgid=msgid@entry=2,
    sctrls=sctrls@entry=0x0, sendabandon=sendabandon@entry=1) at abandon.c:147
        ber = <optimized out>
        i = 0
        err = <optimized out>
        sb = <optimized out>
        lr = <optimized out>
        __PRETTY_FUNCTION__ = "do_abandon"
#7  0x00007ffff798f51a in ldap_abandon_ext (ld=ld@entry=0x7fffec002050, 
msgid=msgid@entry=2, sctrls=sctrls@entry=0x0,
    cctrls=cctrls@entry=0x0) at abandon.c:78
        rc = 0
#8  0x00007ffff798f586 in ldap_abandon (ld=0x7fffec002050, msgid=2) at 
abandon.c:102
No locals.
#9  0x0000000000408080 in do_close (session=0x7fffec0008c0) at myldap.c:929
        i = <optimized out>
        rc = 32767
        sec = <optimized out>
#10 0x000000000040976b in myldap_get_entry (search=search@entry=0x7fffec003450, 
rcp=rcp@entry=0x7ffff2ec4aac) at myldap.c:1646
        tv = {tv_sec = 8589934592, tv_usec = 9}
        count = 0
        rc = -1
        parserc = <optimized out>
        tvp = 0x0
        resultcontrols = 0x7ffff2ec4ce0
        rcp = 0x7ffff2ec4aac
        search = 0x7fffec003450
#11 0x0000000000412b06 in nslcd_group_byname (fp=fp@entry=0x7fffec000fb0, 
session=session@entry=0x7fffec0008c0) at group.c:429
        tmpint32 = 16778240
        search = 0x7fffec003450
        entry = <optimized out>
        base = <optimized out>
        rc = 0
        i = <optimized out>
        name = "group1", '\000' <repeats 252 times>
        filter = "(&(objectClass=posixGroup)(cn=group1))", '\000' <repeats 1853 
times>...
#12 0x000000000040549c in handleconnection (session=0x7fffec0008c0, sock=6) at 
nslcd.c:390
        fp = 0x7fffec000fb0
        action = <optimized out>
        pid = 16568
        uid = 0
        gid = 0
#13 worker (arg=<optimized out>) at nslcd.c:591
        __cancel_buf = {__cancel_jmp_buf = {{__cancel_jmp_buf = {0, 
-6750688455324364415, 0, 140737488347807, 140737268967872, 0,
                6750712521175306625, -6750689007467523711}, __mask_was_saved = 
0}}, __pad = {0x7ffff2ec5f30, 0x0, 0xff, 0x0}}
        __cancel_routine = 0x404fa0 <worker_cleanup>
        __cancel_arg = <optimized out>
        __not_first_call = <optimized out>
        session = <optimized out>
        csock = 6
        j = <optimized out>
        addr = {ss_family = 1, __ss_align = 0,
          __ss_padding = '\000' <repeats 17 times>, "\377", '\000' <repeats 43 times>, 
"\377\377\377", '\000' <repeats 16 times>, ' ' <repeats 16 times>, '\000' <repeats 15 times>}
        alen = 2
        fds = {fds_bits = {32, 0 <repeats 15 times>}}
        tv = {tv_sec = 55, tv_usec = 900964}
#14 0x00007ffff755d6fa in start_thread (arg=0x7ffff2ec6700) at 
pthread_create.c:333
        __res = <optimized out>
        pd = 0x7ffff2ec6700
        now = <optimized out>
        unwind_buf = {cancel_jmp_buf = {{jmp_buf = {140737268967168, 
-6750688455324364415, 0, 140737488347807, 140737268967872,
                0, 6750712521106100609, 6750704760387899777}, mask_was_saved = 
0}}, priv = {pad = {0x0, 0x0, 0x0, 0x0}, data = {
              prev = 0x0, cleanup = 0x0, canceltype = 0}}}
        not_first_call = <optimized out>
        pagesize_m1 = <optimized out>
        sp = <optimized out>
        freesize = <optimized out>
        __PRETTY_FUNCTION__ = "start_thread"
#15 0x00007ffff7293b5d in clone () at 
../sysdeps/unix/sysv/linux/x86_64/clone.S:109
No locals.

Thread 1 (Thread 0x7ffff7fbf740 (LWP 16559)):
#0  0x00007ffff72588dd in nanosleep () at ../sysdeps/unix/syscall-template.S:84
No locals.
#1  0x00007ffff725882a in __sleep (seconds=0, seconds@entry=2147483647) at 
../sysdeps/posix/sleep.c:55
        save_errno = 17
        ts = {tv_sec = 2147483642, tv_nsec = 879449380}
#2  0x000000000040483f in main (argc=<optimized out>, argv=<optimized out>) at 
nslcd.c:863
        i = 5
        signalmask = {__val = {23079, 0 <repeats 15 times>}}
        oldmask = {__val = {0, 4278190080, 0, 0, 280375465083135, 
18374686479688335360, 0, 0, 1095216660480, 65280, 0, 0, 0, 0,
            0, 0}}
        ts = {tv_sec = 4294967295, tv_nsec = 140737488348640}

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