Every time a user connect to service "sabra", smbd generates a core dunp in /var/log/samba/cores/smbd. Log messages: [2014/10/23 18:20:37.369712, 1] ../source3/smbd/service.c:855(make_connection_snum) jagaldo (ipv4:10.10.10.223:53415) connect to service sabra initially as user jagaldo (uid=1005, gid=1005) (pid 26277) [2014/10/23 18:20:37.371658, 0] ../lib/util/fault.c:72(fault_report) =============================================================== [2014/10/23 18:20:37.371733, 0] ../lib/util/fault.c:73(fault_report) INTERNAL ERROR: Signal 11 in pid 26277 (4.0.21) Please read the Trouble-Shooting section of the Samba HOWTO [2014/10/23 18:20:37.371798, 0] ../lib/util/fault.c:75(fault_report) =============================================================== [2014/10/23 18:20:37.371844, 0] ../source3/lib/util.c:810(smb_panic_s3) PANIC (pid 26277): internal error [2014/10/23 18:20:37.372462, 0] ../source3/lib/util.c:921(log_stack_trace) BACKTRACE: 24 stack frames: #0 /lib64/libsmbconf.so.0(log_stack_trace+0x1a) [0x7f445612606a] #1 /lib64/libsmbconf.so.0(smb_panic_s3+0x20) [0x7f4456126140] #2 /lib64/libsamba-util.so.0(smb_panic+0x2f) [0x7f445767182f] #3 /lib64/libsamba-util.so.0(+0x3511c17a46) [0x7f4457671a46] #4 /lib64/libpthread.so.0(+0xefa0) [0x7f445789bfa0] #5 /usr/lib64/samba/libsmbd_base.so(+0x159438) [0x7f445729a438] #6 /usr/lib64/samba/libsmbd_base.so(+0xea4b8) [0x7f445722b4b8] #7 /usr/lib64/samba/libsmbd_base.so(smbd_dirptr_get_entry+0x16f) [0x7f44571fbb2f] #8 /usr/lib64/samba/libsmbd_base.so(smbd_dirptr_lanman2_entry+0x1db) [0x7f445722f4bb] #9 /usr/lib64/samba/libsmbd_base.so(smbd_smb2_request_process_find+0x955) [0x7f445728ad25] #10 /usr/lib64/samba/libsmbd_base.so(smbd_smb2_request_dispatch+0x8fd) [0x7f445727a1bd] #11 /usr/lib64/samba/libsmbd_base.so(smbd_smb2_request_dispatch_immediate+0x70) [0x7f445727bf30] #12 /lib64/libtevent.so.0(tevent_common_loop_immediate+0xd4) [0x7f4454b47444] #13 /lib64/libsmbconf.so.0(run_events_poll+0x3c) [0x7f445614494c] #14 /lib64/libsmbconf.so.0(+0x3512c43c34) [0x7f4456144c34] #15 /lib64/libtevent.so.0(_tevent_loop_once+0x8d) [0x7f4454b46c1d] #16 /usr/lib64/samba/libsmbd_base.so(smbd_process+0x9f0) [0x7f4457267740] #17 /usr/sbin/smbd(+0x9d44) [0x7f4457cd5d44] #18 /lib64/libsmbconf.so.0(run_events_poll+0x16c) [0x7f4456144a7c] #19 /lib64/libsmbconf.so.0(+0x3512c43cd0) [0x7f4456144cd0] #20 /lib64/libtevent.so.0(_tevent_loop_once+0x8d) [0x7f4454b46c1d] #21 /usr/sbin/smbd(main+0x1248) [0x7f4457cd2a78] #22 /lib64/libc.so.6(__libc_start_main+0xf5) [0x7f44547a4b45] #23 /usr/sbin/smbd(+0x6fc1) [0x7f4457cd2fc1] [2014/10/23 18:20:37.377208, 0] ../source3/lib/dumpcore.c:317(dump_core) dumping core in /var/log/samba/cores/smbd [2014/10/23 18:20:37.491021, 1] ../source3/smbd/service.c:855(make_connection_snum) jagaldo (ipv4:10.10.10.223:53416) connect to service sabra initially as user jagaldo (uid=1005, gid=1005) (pid 26279) [2014/10/23 18:20:37.496177, 0] ../lib/util/fault.c:72(fault_report) =============================================================== smb.conf file: [global] socket options=SO_RCVBUF=131072 SO_SNDBUF=131072 TCP_NODELAY write cache size = 2097152 log level = 1 workgroup = ADMDOMUS server string = VMDOMUS mangling method = hash netbios name = VMDOMUS hosts allow = 127. 192.168.56. 10.10.10. log file = /var/log/samba/log.%m max log size = 200 security = user passdb backend = tdbsam wins proxy = no dns proxy = no load printers = yes cups options = raw printcap cache time = 0 [sabra] comment = sabra guest ok = yes path = /sdc1/sabra public = yes writable = yes printable = no browseable = yes force create mode = 0777 dos filetime resolution = yes level2 oplocks = yes [bup0] comment = sabra guest ok = yes path = /bupadmdomus-resto/bup0 public = yes writable = no printable = no browseable = yes readonly = yes OS-info: NAME=Fedora VERSION="19 (Schrödinger’s Cat)" ID=fedora VERSION_ID=19 PRETTY_NAME="Fedora 19 (Schrödinger’s Cat)" ANSI_COLOR="0;34" CPE_NAME="cpe:/o:fedoraproject:fedora:19" HOME_URL="https://fedoraproject.org/" BUG_REPORT_URL="https://bugzilla.redhat.com/" REDHAT_BUGZILLA_PRODUCT="Fedora" REDHAT_BUGZILLA_PRODUCT_VERSION=19 REDHAT_SUPPORT_PRODUCT="Fedora" REDHAT_SUPPORT_PRODUCT_VERSION=19 samba-4.0.21-1.fc19 x86_64 kernel: 3.14.17-100.fc19.x86_64 Thank you.