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Re: [SOGo] Samba crashing


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  • From: Julien Kerihuel < >
  • To:
  • Subject: Re: [SOGo] Samba crashing
  • Date: Thu, 19 Jun 2014 05:34:56 -0700

Hi Rex,

What is the version of openchange you are experiencing this crash with?
(git master, 3rd party repo?)

Cheers,
Julien.

On 18/06/14 16:53, Rex Johnston wrote:
> I'll just cut straight to the end here.
>
> Running samba in the debugger...
>
> Program received signal SIGSEGV, Segmentation fault.
> ndr_push_mapi_response (ndr=0xd285b0, ndr_flags=<optimized out>, r=0x0)
> at ndr_mapi.c:561
> 561 NDR_CHECK(ndr_push_uint16(ndr, NDR_SCALARS, r->length));
> (gdb) bt
> #0 ndr_push_mapi_response (ndr=0xd285b0, ndr_flags=<optimized out>,
> r=0x0) at ndr_mapi.c:561
> #1 0x00007fffd8ac14f8 in dcesrv_EcDoRpcExt2 (r=0x13da110,
> mem_ctx=0x307a9c0, dce_call=<optimized out>) at
> mapiproxy/servers/default/emsmdb/dcesrv_exchange_emsmdb.c:1792
> #2 dcesrv_exchange_emsmdb_dispatch (dce_call=<optimized out>,
> mem_ctx=0x307a9c0, r=0x13da110, mapiproxy=<optimized out>) at
> mapiproxy/servers/default/emsmdb/dcesrv_exchange_emsmdb.c:1943
> #3 0x00007fffd9c198fc in mapiproxy_server_dispatch (dce_call=0x307a9c0,
> mem_ctx=0x307a9c0, r=0x13da110, mapiproxy=0x7fffffffdf10) at
> mapiproxy/libmapiproxy/dcesrv_mapiproxy_server.c:57
> #4 0x00007fffd9e57b40 in mapiproxy_op_dispatch (dce_call=0x307a9c0,
> mem_ctx=0x307a9c0, r=0x13da110) at mapiproxy/dcesrv_mapiproxy.c:504
> #5 0x00007fffe5cb9fd2 in dcesrv_request (call=0x307a9c0) at
> ../source4/rpc_server/dcerpc_server.c:965
> #6 dcesrv_process_ncacn_packet (dce_conn=<optimized out>,
> pkt=<optimized out>, blob=...) at ../source4/rpc_server/dcerpc_server.c:1110
> #7 0x00007fffe5cbab59 in dcesrv_read_fragment_done (subreq=0x0) at
> ../source4/rpc_server/dcerpc_server.c:1488
> #8 0x00007ffff4987698 in dcerpc_read_ncacn_packet_done (subreq=0x0) at
> ../librpc/rpc/dcerpc_util.c:295
> #9 0x00007ffff151ac64 in tstream_readv_pdu_readv_done
> (subreq=0x2bc4e40) at ../lib/tsocket/tsocket_helpers.c:319
> #10 0x00007ffff1519b64 in tstream_readv_done (subreq=0x0) at
> ../lib/tsocket/tsocket.c:604
> #11 0x00007ffff3f170e2 in tevent_common_loop_immediate () from
> /usr/lib/x86_64-linux-gnu/libtevent.so.0
> #12 0x00007ffff3f19b26 in ?? () from
> /usr/lib/x86_64-linux-gnu/libtevent.so.0
> #13 0x00007ffff3f16860 in _tevent_loop_once () from
> /usr/lib/x86_64-linux-gnu/libtevent.so.0
> #14 0x00007ffff3f169eb in tevent_common_loop_wait () from
> /usr/lib/x86_64-linux-gnu/libtevent.so.0
> #15 0x0000000000409459 in binary_smbd_main (argc=<optimized out>,
> argv=<optimized out>, binary_name=0x40bf95 "samba") at
> ../source4/smbd/server.c:486
> #16 0x00007ffff3b7476d in __libc_start_main () from
> /lib/x86_64-linux-gnu/libc.so.6
> #17 0x0000000000405631 in _start ()
> (gdb) print r
> $1 = (const struct mapi_response *) 0x0
>
>
> I've altered mapiproxy/servers/default/emsmdb/dcesrv_exchange_emsmdb.c:1782
>
> if( !( mapi_response = EcDoRpc_process_transaction(mem_ctx,
> emsmdbp_ctx, mapi2k7_request.mapi_request) ) ) // hmmm, Rex
> return MAPI_E_INVALID_OBJECT;
>
> It seems to have stopped the null pointer problem, but i have absolutely
> no idea what it should do when EcDoRpc_process_transaction() returns NULL,
> or even what MAPI_E_INVALID_OBJECT means.
>
> Cheers, Rex
>

--
Julien Kerihuel

OpenChange Project Founder

Twitter: http://twitter.com/jkerihuel

GPG Fingerprint: 0B55 783D A781 6329 108A B609 7EF6 FE11 A35F 1F79


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