Hi!
At work I have to connect to our SLES servers via Windows RDP and a Windows
server. Unfortunately RDP is not working reliably, and it sometimes misses key
presses, and at other times it duplicates them. That way I ended up adding an
olcAuthzRegexp that lacked a backspace.
Unfrtunately when trying to ldapmodify the server I just got:
modifying entry "cn=config"
ldap_result: Can't contact LDAP server (-1)
the regex in question is:
olcAuthzRegexp: {3} "^dn:dnQualifier=uid\3D(^,)\\2Cou\\3Dpeople\\2Cdc\\3DXXX
\\2Cdc\\3Dde$" "dn: uid=$1,ou=people,dc=XXX=de"
As it turned out the server dumped core (100% reproducible). I know the regex
is bad, but maybe it shouldn’t kill the server.
The server is SUSE’s version that corresponds to some 2.5.x with patches.
Anyway the backtrace is:
Mar 17 14:36:23 v05 slapd[15911]: conn=1000 op=1 syncprov_matchops: recording
uuid for dn=cn=config on opc=0x7fcfe0000d58
Mar 17 14:36:23 v05 slapd[15911]: slap_get_csn: conn=1000 op=1 generated new
csn=20250317133623.651964Z#000000#005#000000 manage=1
Mar 17 14:36:23 v05 slapd[15911]: slap_queue_csn: queueing 0x7fcfe0106c70
20250317133623.651964Z#000000#005#000000
Mar 17 14:36:23 v05 kernel: slapd[15919]: segfault at 7fc81ceea633 ip
00007fcff658553e sp 00007fcfe9ff4e40 error 4 in
libldap-2.5.releng.so.0.1.13[7fcff653b000+5c000] likely on CPU 1 (core 0,
socket 2)
Mar 17 14:36:23 v05 kernel: Code: 7f 08 4d 85 ff 75 9e 48 83 c4 18 b8 fa ff ff
ff 5b 5d 41 5c 41 5d 41 5e 41 5f c3 90 48 85 ff 74 3b 41 54 55 31 ed 53 48 89
fb <48> 8b 7f 08 49 89 f4 48 85 ff 75 3e 48 8b 7b 10 48 85 ff 75 25 4d
…
Mar 17 14:36:23 v05 systemd[1]: Started Process Core Dump (PID 15922/UID 0).
Mar 17 14:36:23 v05 systemd-coredump[15923]: [🡕] Process 15911 (slapd) of user
1000 dumped core.
Stack trace of thread 15919:
#0 0x00007fcff658553e
ldap_avl_free (libldap-2.5.releng.so.0 + 0x4a53e)
#1 0x0000555fb6ca9b42
rewrite_info_delete (slapd + 0xd6b42)
#2 0x0000555fb6c64bae
slap_sasl_regexp_config (slapd + 0x91bae)
#3 0x0000555fb6c03a09 n/a
(slapd + 0x30a09)
#4 0x0000555fb6c091d3
config_set_vals (slapd + 0x361d3)
#5 0x0000555fb6c0a14f
config_parse_add (slapd + 0x3714f)
#6 0x0000555fb6bfcdcc n/a
(slapd + 0x29dcc)
#7 0x0000555fb6bfdc96 n/a
(slapd + 0x2ac96)
#8 0x0000555fb6c8a523
overlay_op_walk (slapd + 0xb7523)
#9 0x0000555fb6c8a6ae n/a
(slapd + 0xb76ae)
#10 0x0000555fb6c2dbd2
fe_op_modify (slapd + 0x5abd2)
#11 0x0000555fb6c2f941
do_modify (slapd + 0x5c941)
#12 0x0000555fb6c1618f n/a
(slapd + 0x4318f)
#13 0x0000555fb6c1698d n/a
(slapd + 0x4398d)
#14 0x00007fcff6583da0 n/a
(libldap-2.5.releng.so.0 + 0x48da0)
#15 0x00007fcff62a758c
start_thread (libc.so.6 + 0xa758c)
#16 0x00007fcff632ea28
__clone3 (libc.so.6 + 0x12ea28)
Stack trace of thread 15915:
#0 0x00007fcff62a3c4e
__futex_abstimed_wait_common (libc.so.6 + 0xa3c4e)
#1 0x00007fcff62a6890
pthread_cond_wait@@GLIBC_2.3.2 (libc.so.6 + 0xa6890)
#2 0x00007fcff6583e40 n/a
(libldap-2.5.releng.so.0 + 0x48e40)
#3 0x00007fcff62a758c
start_thread (libc.so.6 + 0xa758c)
#4 0x00007fcff632ea28
__clone3 (libc.so.6 + 0x12ea28)
Stack trace of thread 15917:
#0 0x00007fcff62a3c4e
__futex_abstimed_wait_common (libc.so.6 + 0xa3c4e)
#1 0x00007fcff62a6890
pthread_cond_wait@@GLIBC_2.3.2 (libc.so.6 + 0xa6890)
#2 0x00007fcff6583e40 n/a
(libldap-2.5.releng.so.0 + 0x48e40)
#3 0x00007fcff62a758c
start_thread (libc.so.6 + 0xa758c)
#4 0x00007fcff632ea28
__clone3 (libc.so.6 + 0x12ea28)
Stack trace of thread 15911:
#0 0x00007fcff62a3c4e
__futex_abstimed_wait_common (libc.so.6 + 0xa3c4e)
#1 0x00007fcff62a91a3
__pthread_clockjoin_ex (libc.so.6 + 0xa91a3)
#2 0x0000555fb6c131ca
slapd_daemon (slapd + 0x401ca)
#3 0x0000555fb6bf688e main
(slapd + 0x2388e)
#4 0x00007fcff6240e6c
__libc_start_call_main (libc.so.6 + 0x40e6c)
#5 0x00007fcff6240f35
__libc_start_main@@GLIBC_2.34 (libc.so.6 + 0x40f35)
#6 0x0000555fb6bf690a _start
(slapd + 0x2390a)
Stack trace of thread 15913:
#0 0x00007fcff632ee86
epoll_wait (libc.so.6 + 0x12ee86)
#1 0x0000555fb6c1007b n/a
(slapd + 0x3d07b)
#2 0x00007fcff62a758c
start_thread (libc.so.6 + 0xa758c)
#3 0x00007fcff632ea28
__clone3 (libc.so.6 + 0x12ea28)
Stack trace of thread 15918:
#0 0x00007fcff62a3c4e
__futex_abstimed_wait_common (libc.so.6 + 0xa3c4e)
#1 0x00007fcff62a6890
pthread_cond_wait@@GLIBC_2.3.2 (libc.so.6 + 0xa6890)
#2 0x00007fcff6583e40 n/a
(libldap-2.5.releng.so.0 + 0x48e40)
#3 0x00007fcff62a758c
start_thread (libc.so.6 + 0xa758c)
#4 0x00007fcff632ea28
__clone3 (libc.so.6 + 0x12ea28)
Stack trace of thread 15914:
#0 0x00007fcff62a3c4e
__futex_abstimed_wait_common (libc.so.6 + 0xa3c4e)
#1 0x00007fcff62a6890
pthread_cond_wait@@GLIBC_2.3.2 (libc.so.6 + 0xa6890)
#2 0x00007fcff6583e40 n/a
(libldap-2.5.releng.so.0 + 0x48e40)
#3 0x00007fcff62a758c
start_thread (libc.so.6 + 0xa758c)
#4 0x00007fcff632ea28
__clone3 (libc.so.6 + 0x12ea28)
ELF object binary
architecture: AMD x86-64
Mar 17 14:36:23 v05 ldapmodify[15921]: DIGEST-MD5 common mech free
Mar 17 14:36:23 v05 systemd[1]: slapd.service: Main process exited,
code=dumped, status=11/SEGV
Mar 17 14:36:23 v05 systemd[1]: slapd.service: Failed with result 'core-dump'.
Mar 17 14:36:23 v05 systemd[1]: [email protected]: Deactivated
successfully.
Kind regards,
Ulrich Windl
