We are having an smb_panic due to a possible talloc related memory corruption. Backtrace from GDB: (gdb) bt #0 0x00007f5bba90265e in waitpid () from /lib64/libc.so.6 #1 0x00007f5bba894609 in do_system () from /lib64/libc.so.6 #2 0x00007f5bbc36f06c in smb_panic_s3 (why=0x7f5bbe323fbd "internal error") at ../source3/lib/util.c:803 #3 0x00007f5bbe313839 in smb_panic (why=0x7f5bbe323fbd "internal error") at ../lib/util/fault.c:166 #4 0x00007f5bbe313513 in fault_report (sig=11) at ../lib/util/fault.c:83 #5 0x00007f5bbe313528 in sig_fault (sig=11) at ../lib/util/fault.c:94 #6 <signal handler called> #7 0x00007f5bb8ac65df in dbwrap_parse_record (db=0x7f5be8150c73, key=..., parser=0x7f5bb8eed858 <netlogon_creds_cli_fetch_parser>, private_data=0x7ffd96fc6a90) at ../lib/dbwrap/dbwrap.c:387 #8 0x00007f5bb8eee2f0 in netlogon_creds_cli_lock_fetch (req=0x7f5bc0b40160) at ../libcli/auth/netlogon_creds_cli.c:849 #9 0x00007f5bb8eee0da in netlogon_creds_cli_lock_send (mem_ctx=0x7f5bc0b40a90, ev=0x7f5bc0b3bb30, context=0x7f5bc0b3c800) at ../libcli/auth/netlogon_creds_cli.c:796 #10 0x00007f5bb8ef14be in netlogon_creds_cli_LogonSamLogon_start (req=0x7f5bc0b40900) at ../libcli/auth/netlogon_creds_cli.c:2292 #11 0x00007f5bb8ef19c8 in netlogon_creds_cli_LogonSamLogon_done (subreq=0x0) at ../libcli/auth/netlogon_creds_cli.c:2403 #12 0x00007f5bbabefff8 in _tevent_req_notify_callback () from /usr/lib/libtevent.so.0 #13 0x00007f5bbabf00cd in tevent_req_finish () from /usr/lib/libtevent.so.0 #14 0x00007f5bbabf00f4 in _tevent_req_done () from /usr/lib/libtevent.so.0 #15 0x00007f5bb857b8bd in dcerpc_netr_LogonSamLogonEx_done (subreq=0x0) at default/librpc/gen_ndr/ndr_netlogon_c.c:8307 #16 0x00007f5bbabefff8 in _tevent_req_notify_callback () from /usr/lib/libtevent.so.0 #17 0x00007f5bbabf00cd in tevent_req_finish () from /usr/lib/libtevent.so.0 #18 0x00007f5bbabf00f4 in _tevent_req_done () from /usr/lib/libtevent.so.0 #19 0x00007f5bb857b450 in dcerpc_netr_LogonSamLogonEx_r_done (subreq=0x0) at default/librpc/gen_ndr/ndr_netlogon_c.c:8179 #20 0x00007f5bbabefff8 in _tevent_req_notify_callback () from /usr/lib/libtevent.so.0 #21 0x00007f5bbabf00cd in tevent_req_finish () from /usr/lib/libtevent.so.0 #22 0x00007f5bbabf00f4 in _tevent_req_done () from /usr/lib/libtevent.so.0 #23 0x00007f5bb6e1579f in dcerpc_binding_handle_call_done (subreq=0x0) at ../librpc/rpc/binding_handle.c:514 #24 0x00007f5bbabefff8 in _tevent_req_notify_callback () from /usr/lib/libtevent.so.0 #25 0x00007f5bbabf00cd in tevent_req_finish () from /usr/lib/libtevent.so.0 #26 0x00007f5bbabf00f4 in _tevent_req_done () from /usr/lib/libtevent.so.0 #27 0x00007f5bb6e14c59 in dcerpc_binding_handle_raw_call_done (subreq=0x0) at ../librpc/rpc/binding_handle.c:187 #28 0x00007f5bbabefff8 in _tevent_req_notify_callback () from /usr/lib/libtevent.so.0 #29 0x00007f5bbabf00cd in tevent_req_finish () from /usr/lib/libtevent.so.0 #30 0x00007f5bbabf00f4 in _tevent_req_done () from /usr/lib/libtevent.so.0 #31 0x00007f5bb8ef88a9 in rpccli_bh_raw_call_done (subreq=0x0) at ../source3/rpc_client/cli_pipe.c:2143 #32 0x00007f5bbabefff8 in _tevent_req_notify_callback () from /usr/lib/libtevent.so.0 #33 0x00007f5bbabf00cd in tevent_req_finish () from /usr/lib/libtevent.so.0 #34 0x00007f5bbabf00f4 in _tevent_req_done () from /usr/lib/libtevent.so.0 #35 0x00007f5bb8ef7591 in rpc_api_pipe_req_done (subreq=0x0) at ../source3/rpc_client/cli_pipe.c:1561 #36 0x00007f5bbabefff8 in _tevent_req_notify_callback () from /usr/lib/libtevent.so.0 #37 0x00007f5bbabf00cd in tevent_req_finish () from /usr/lib/libtevent.so.0 #38 0x00007f5bbabf00f4 in _tevent_req_done () from /usr/lib/libtevent.so.0 #39 0x00007f5bb8ef6170 in rpc_api_pipe_got_pdu (subreq=0x0) at ../source3/rpc_client/cli_pipe.c:957 #40 0x00007f5bbabefff8 in _tevent_req_notify_callback () from /usr/lib/libtevent.so.0 #41 0x00007f5bbabf00cd in tevent_req_finish () from /usr/lib/libtevent.so.0 #42 0x00007f5bbabf00f4 in _tevent_req_done () from /usr/lib/libtevent.so.0 #43 0x00007f5bb8ef49da in get_complete_frag_got_rest (subreq=0x0) at ../source3/rpc_client/cli_pipe.c:373 #44 0x00007f5bbabefff8 in _tevent_req_notify_callback () from /usr/lib/libtevent.so.0 #45 0x00007f5bbabf00cd in tevent_req_finish () from /usr/lib/libtevent.so.0 I've got ASCII representation of relevant memory locations. As seen below, the 'key' has size of 8, but the value is of a longer size. Also, the value seems to be coming from a talloc-freed memory location. (gdb) p key $2 = {dptr = 0x7f5bb8f00ae0 "../libcli/auth/netlogon_creds_cli.c:2220", dsize = 8} (gdb) (gdb) xxd 0x7f5bb8f007e0 2000 0000000: 6574 6c6f 676f 6e5f 6372 6564 735f 636c etlogon_creds_cl 0000010: 692e 633a 3139 3739 0000 0000 0000 0000 i.c:1979........ 0000020: 2e2e 2f6c 6962 636c 692f 6175 7468 2f6e ../libcli/auth/n 0000030: 6574 6c6f 676f 6e5f 6372 6564 735f 636c etlogon_creds_cl 0000040: 692e 633a 3139 3830 0000 0000 0000 0000 i.c:1980........ 0000050: 2e2e 2f6c 6962 636c 692f 6175 7468 2f6e ../libcli/auth/n 0000060: 6574 6c6f 676f 6e5f 6372 6564 735f 636c etlogon_creds_cl 0000070: 692e 633a 3139 3930 0000 0000 0000 0000 i.c:1990........ 0000080: 2e2e 2f6c 6962 636c 692f 6175 7468 2f6e ../libcli/auth/n 0000090: 6574 6c6f 676f 6e5f 6372 6564 735f 636c etlogon_creds_cl 00000a0: 692e 633a 3139 3935 0000 0000 0000 0000 i.c:1995........ 00000b0: 2e2e 2f6c 6962 636c 692f 6175 7468 2f6e ../libcli/auth/n 00000c0: 6574 6c6f 676f 6e5f 6372 6564 735f 636c etlogon_creds_cl 00000d0: 692e 633a 3230 3036 0000 0000 0000 0000 i.c:2006........ 00000e0: 2e2e 2f6c 6962 636c 692f 6175 7468 2f6e ../libcli/auth/n 00000f0: 6574 6c6f 676f 6e5f 6372 6564 735f 636c etlogon_creds_cl 0000100: 692e 633a 3230 3131 0000 0000 0000 0000 i.c:2011........ 0000110: 2e2e 2f6c 6962 636c 692f 6175 7468 2f6e ../libcli/auth/n 0000120: 6574 6c6f 676f 6e5f 6372 6564 735f 636c etlogon_creds_cl 0000130: 692e 633a 3230 3334 0000 0000 0000 0000 i.c:2034........ 0000140: 2e2e 2f6c 6962 636c 692f 6175 7468 2f6e ../libcli/auth/n 0000150: 6574 6c6f 676f 6e5f 6372 6564 735f 636c etlogon_creds_cl 0000160: 692e 633a 3230 3534 0000 0000 0000 0000 i.c:2054........ 0000170: 2e2e 2f6c 6962 636c 692f 6175 7468 2f6e ../libcli/auth/n 0000180: 6574 6c6f 676f 6e5f 6372 6564 735f 636c etlogon_creds_cl 0000190: 692e 633a 3231 3039 0000 0000 0000 0000 i.c:2109........ 00001a0: 7374 7275 6374 206e 6574 6c6f 676f 6e5f struct netlogon_ 00001b0: 6372 6564 735f 636c 695f 4c6f 676f 6e53 creds_cli_LogonS 00001c0: 616d 4c6f 676f 6e5f 7374 6174 6500 0000 amLogon_state... 00001d0: 2e2e 2f6c 6962 636c 692f 6175 7468 2f6e ../libcli/auth/n 00001e0: 6574 6c6f 676f 6e5f 6372 6564 735f 636c etlogon_creds_cl 00001f0: 692e 633a 3231 3234 0075 6e69 6f6e 206e i.c:2124.union n 0000200: 6574 725f 5661 6c69 6461 7469 6f6e 0000 etr_Validation.. 0000210: 2e2e 2f6c 6962 636c 692f 6175 7468 2f6e ../libcli/auth/n 0000220: 6574 6c6f 676f 6e5f 6372 6564 735f 636c etlogon_creds_cl 0000230: 692e 633a 3231 3433 0000 0000 0000 0000 i.c:2143........ 0000240: 2e2e 2f6c 6962 636c 692f 6175 7468 2f6e ../libcli/auth/n 0000250: 6574 6c6f 676f 6e5f 6372 6564 735f 636c etlogon_creds_cl 0000260: 692e 633a 3231 3635 0000 0000 0000 0000 i.c:2165........ 0000270: 2e2e 2f6c 6962 636c 692f 6175 7468 2f6e ../libcli/auth/n 0000280: 6574 6c6f 676f 6e5f 6372 6564 735f 636c etlogon_creds_cl 0000290: 692e 633a 3232 3030 0000 0000 0000 0000 i.c:2200........ 00002a0: 2e2e 2f6c 6962 636c 692f 6175 7468 2f6e ../libcli/auth/n 00002b0: 6574 6c6f 676f 6e5f 6372 6564 735f 636c etlogon_creds_cl 00002c0: 692e 633a 3232 3133 0000 0000 0000 0000 i.c:2213........ 00002d0: 2e2e 2f6c 6962 636c 692f 6175 7468 2f6e ../libcli/auth/n 00002e0: 6574 6c6f 676f 6e5f 6372 6564 735f 636c etlogon_creds_cl 00002f0: 692e 633a 3232 3139 0000 0000 0000 0000 i.c:2219........ 0000300: 2e2e 2f6c 6962 636c 692f 6175 7468 2f6e ../libcli/auth/n 0000310: 6574 6c6f 676f 6e5f 6372 6564 735f 636c etlogon_creds_cl 0000320: 692e 633a 3232 3230 0000 0000 0000 0000 i.c:2220........ 0000330: 2e2e 2f6c 6962 636c 692f 6175 7468 2f6e ../libcli/auth/n 0000340: 6574 6c6f 676f 6e5f 6372 6564 735f 636c etlogon_creds_cl 0000350: 692e 633a 3232 3438 0000 0000 0000 0000 i.c:2248........ 0000360: 2e2e 2f6c 6962 636c 692f 6175 7468 2f6e ../libcli/auth/n 0000370: 6574 6c6f 676f 6e5f 6372 6564 735f 636c etlogon_creds_cl 0000380: 692e 633a 3232 3630 0000 0000 0000 0000 i.c:2260........ 0000390: 2e2e 2f6c 6962 636c 692f 6175 7468 2f6e ../libcli/auth/n 00003a0: 6574 6c6f 676f 6e5f 6372 6564 735f 636c etlogon_creds_cl 00003b0: 692e 633a 3232 3830 0000 0000 0000 0000 i.c:2280........ 00003c0: 2e2e 2f6c 6962 636c 692f 6175 7468 2f6e ../libcli/auth/n 00003d0: 6574 6c6f 676f 6e5f 6372 6564 735f 636c etlogon_creds_cl 00003e0: 692e 633a 3232 3934 0000 0000 0000 0000 i.c:2294........ 00003f0: 2e2e 2f6c 6962 636c 692f 6175 7468 2f6e ../libcli/auth/n 0000400: 6574 6c6f 676f 6e5f 6372 6564 735f 636c etlogon_creds_cl 0000410: 692e 633a 3233 3133 0000 0000 0000 0000 i.c:2313........ 0000420: 2e2e 2f6c 6962 636c 692f 6175 7468 2f6e ../libcli/auth/n 0000430: 6574 6c6f 676f 6e5f 6372 6564 735f 636c etlogon_creds_cl 0000440: 692e 633a 3233 3338 0000 0000 0000 0000 i.c:2338........ 0000450: 2e2e 2f6c 6962 636c 692f 6175 7468 2f6e ../libcli/auth/n 0000460: 6574 6c6f 676f 6e5f 6372 6564 735f 636c etlogon_creds_cl 0000470: 692e 633a 3233 3537 0000 0000 0000 0000 i.c:2357........ 0000480: 2e2e 2f6c 6962 636c 692f 6175 7468 2f6e ../libcli/auth/n 0000490: 6574 6c6f 676f 6e5f 6372 6564 735f 636c etlogon_creds_cl 00004a0: 692e 633a 3233 3733 0000 0000 0000 0000 i.c:2373........ 00004b0: 2e2e 2f6c 6962 636c 692f 6175 7468 2f6e ../libcli/auth/n 00004c0: 6574 6c6f 676f 6e5f 6372 6564 735f 636c etlogon_creds_cl 00004d0: 692e 633a 3233 3736 0000 0000 0000 0000 i.c:2376........ 00004e0: 2e2e 2f6c 6962 636c 692f 6175 7468 2f6e ../libcli/auth/n 00004f0: 6574 6c6f 676f 6e5f 6372 6564 735f 636c etlogon_creds_cl 0000500: 692e 633a 3233 3835 0000 0000 0000 0000 i.c:2385........ 0000510: 2e2e 2f6c 6962 636c 692f 6175 7468 2f6e ../libcli/auth/n 0000520: 6574 6c6f 676f 6e5f 6372 6564 735f 636c etlogon_creds_cl 0000530: 692e 633a 3233 3932 0000 0000 0000 0000 i.c:2392........ 0000540: 2e2e 2f6c 6962 636c 692f 6175 7468 2f6e ../libcli/auth/n 0000550: 6574 6c6f 676f 6e5f 6372 6564 735f 636c etlogon_creds_cl 0000560: 692e 633a 3234 3037 0000 0000 0000 0000 i.c:2407........ 0000570: 2e2e 2f6c 6962 636c 692f 6175 7468 2f6e ../libcli/auth/n 0000580: 6574 6c6f 676f 6e5f 6372 6564 735f 636c etlogon_creds_cl 0000590: 692e 633a 3234 3133 0000 0000 0000 0000 i.c:2413........ 00005a0: 2e2e 2f6c 6962 636c 692f 6175 7468 2f6e ../libcli/auth/n 00005b0: 6574 6c6f 676f 6e5f 6372 6564 735f 636c etlogon_creds_cl 00005c0: 692e 633a 3234 3233 0000 0000 0000 0000 i.c:2423........ 00005d0: 2e2e 2f6c 6962 636c 692f 6175 7468 2f6e ../libcli/auth/n 00005e0: 6574 6c6f 676f 6e5f 6372 6564 735f 636c etlogon_creds_cl 00005f0: 692e 633a 3234 3333 0000 0000 0000 0000 i.c:2433........ 0000600: 2e2e 2f6c 6962 636c 692f 6175 7468 2f6e ../libcli/auth/n 0000610: 6574 6c6f 676f 6e5f 6372 6564 735f 636c etlogon_creds_cl 0000620: 692e 633a 3234 3430 0000 0000 0000 0000 i.c:2440........ 0000630: 2e2e 2f6c 6962 636c 692f 6175 7468 2f6e ../libcli/auth/n 0000640: 6574 6c6f 676f 6e5f 6372 6564 735f 636c etlogon_creds_cl 0000650: 692e 633a 3234 3431 0000 0000 0000 0000 i.c:2441........ 0000660: 2e2e 2f6c 6962 636c 692f 6175 7468 2f6e ../libcli/auth/n 0000670: 6574 6c6f 676f 6e5f 6372 6564 735f 636c etlogon_creds_cl 0000680: 692e 633a 3234 3534 0000 0000 0000 0000 i.c:2454........ 0000690: 2e2e 2f6c 6962 636c 692f 6175 7468 2f6e ../libcli/auth/n 00006a0: 6574 6c6f 676f 6e5f 6372 6564 735f 636c etlogon_creds_cl 00006b0: 692e 633a 3234 3630 0000 0000 0000 0000 i.c:2460........ 00006c0: 2e2e 2f6c 6962 636c 692f 6175 7468 2f6e ../libcli/auth/n 00006d0: 6574 6c6f 676f 6e5f 6372 6564 735f 636c etlogon_creds_cl 00006e0: 692e 633a 3234 3638 0000 0000 0000 0000 i.c:2468........ 00006f0: 2e2e 2f6c 6962 636c 692f 6175 7468 2f6e ../libcli/auth/n 0000700: 6574 6c6f 676f 6e5f 6372 6564 735f 636c etlogon_creds_cl 0000710: 692e 633a 3234 3639 0000 0000 0000 0000 i.c:2469........ 0000720: 2e2e 2f6c 6962 636c 692f 6175 7468 2f6e ../libcli/auth/n 0000730: 6574 6c6f 676f 6e5f 6372 6564 735f 636c etlogon_creds_cl 0000740: 692e 633a 3234 3739 0000 0000 0000 0000 i.c:2479........ 0000750: 2e2e 2f6c 6962 636c 692f 6175 7468 2f6e ../libcli/auth/n 0000760: 6574 6c6f 676f 6e5f 6372 6564 735f 636c etlogon_creds_cl 0000770: 692e 633a 3234 3837 0000 0000 0000 0000 i.c:2487........ 0000780: 2e2e 2f6c 6962 636c 692f 6175 7468 2f6e ../libcli/auth/n 0000790: 6574 6c6f 676f 6e5f 6372 6564 735f 636c etlogon_creds_cl 00007a0: 692e 633a 3234 3932 0000 0000 0000 0000 i.c:2492........ 00007b0: 2e2e 2f6c 6962 636c 692f 6175 7468 2f6e ../libcli/auth/n 00007c0: 6574 6c6f 676f 6e5f 6372 6564 735f 636c etlogon_creds_cl
Version 4.3.0pre1-GIT-1337909
Can you run this under valgrind?