(ITS#7968) SIGSEGV shortly after reconnection performed by syncrepl due to synchronization conflicts

[leo@yuriev.ru]

Full_Name: Leonid Yuriev
Version: 2.4.40
OS: RHEL7
URL: ftp://ftp.openldap.org/incoming/
Submission from: (NULL) (31.130.36.33)


Currently there is a couple of backtraces only.
This is the result of a stress test of replication in the presence of
sync-conflicts after a "split brain" case.
No any network troubles (just a loopback connections).

** Signal 11 (Segmentation fault), address is 0x797a from 0x50e8bd
(0) /opt/openldap.devel/libexec/slapd() [0x50e8bd]: syncprov_op_abandon
/home/ly/Projects/openldap.git/servers/slapd/overlays/syncprov.c:1134
(1) /opt/openldap.devel/libexec/slapd() [0x48b31a]: overlay_op_walk
/home/ly/Projects/openldap.git/servers/slapd/backover.c:662
(2) /opt/openldap.devel/libexec/slapd() [0x48b4c1]: over_op_func
/home/ly/Projects/openldap.git/servers/slapd/backover.c:724
(3) /opt/openldap.devel/libexec/slapd() [0x4429a7]: fe_op_abandon
/home/ly/Projects/openldap.git/servers/slapd/abandon.c:134 (discriminator 2)
(4) /opt/openldap.devel/libexec/slapd() [0x42283c]: connection_abandon
/home/ly/Projects/openldap.git/servers/slapd/connection.c:740 (discriminator 3)
(5) /opt/openldap.devel/libexec/slapd() [0x424509]: connection_closing
/home/ly/Projects/openldap.git/servers/slapd/connection.c:829
(6) /opt/openldap.devel/libexec/slapd() [0x4250ef]: connection_read
/home/ly/Projects/openldap.git/servers/slapd/connection.c:1477
connection_read_thread
/home/ly/Projects/openldap.git/servers/slapd/connection.c:1284
(7) /opt/openldap.devel/lib/libldap_r-2.4.so.2(+0x10cf2) [0x7f8c6de89cf2]: ??

*** Signal 11 (Segmentation fault), address is 0x7f7a1e1c5000 from
0x7f7a1eebfb54
(0) /lib/x86_64-linux-gnu/libc.so.6(+0x98b54) [0x7f7a1eebfb54]: ????:0
(1) /opt/openldap.devel/libexec/slapd() [0x4afa7d]: mdb_search
/home/ly/Projects/openldap.git/servers/slapd/back-mdb/search.c:987
(discriminator 3)
(2) /opt/openldap.devel/libexec/slapd() [0x48b356]: 543edda2 overlay_op_walk
/home/ly/Projects/openldap.git/servers/slapd/backover.c:674
(3) /opt/openldap.devel/libexec/slapd() [0x48b4c1]: over_op_func
/home/ly/Projects/openldap.git/servers/slapd/backover.c:724
(4) /opt/openldap.devel/libexec/slapd() [0x427201]: fe_op_search
/home/ly/Projects/openldap.git/servers/slapd/search.c:402
(5) /opt/openldap.devel/libexec/slapd() [0x426c0c]: do_search
/home/ly/Projects/openldap.git/servers/slapd/search.c:247
(6) /opt/openld.d.devel/libexec/slapd() [0x424b54]: connection_operation
/home/ly/Projects/openldap.git/servers/slapd/connection.c:1158
(7) /opt/openldap.devel/libexec/slapd() [0x42526c]: connection_read_thread
/home/ly/Projects/openldap.git/servers/slapd/connection.c:1291
(8) /opt/openldap.devel/lib/libldap_r-2.4.so.2(+0x10cf2) [0x7f7a1f629cf2]: ??