sessionid.tdb missing after build and client read failutre
David Shapiro
david.shapiro at btitele.com
Wed Jul 3 13:06:06 GMT 2002
I recompiled with CFLAGS option -g and ran again:
313 fmtint (buffer, &currlen, maxlen,
value, 10, min, max, flags);
(gdb)
314 break;
(gdb)
368 break;
(gdb)
400 state = DP_S_DEFAULT;
(gdb)
401 flags = cflags = min = 0;
(gdb)
402 max = -1;
(gdb)
408 break; /* some picky compilers need this */
(gdb)
185 switch(state) {
(gdb)
187 if (ch == '%')
(gdb)
190 dopr_outch (buffer, &currlen,
maxlen, ch);
(gdb)
192 break;
(gdb)
408 break; /* some picky compilers need this */
(gdb)
185 switch(state) {
(gdb)
408 break; /* some picky compilers need this */
(gdb)
411 if (maxlen != 0) {
(gdb)
412 if (currlen < maxlen - 1)
(gdb)
413 buffer[currlen] = '\0';
(gdb)
419 }
(gdb)
vsnprintf (str=0x15 <Address 0x15 out of bounds>, count=1023, fmt=0x1c482e
"", args=0xffbef50c) at lib/snprintf.c:777
777 }
(gdb)
dbgtext (format_str=0x1c4818 "got smb length of %d\n") at lib/debug.c:982
982 format_debug_text( msgbuf );
(gdb)
985 } /* dbgtext */
(gdb)
read_smb_length_return_keepalive (fd=13, inbuf=0x26af68 "", timeout=0) at
lib/util_sock.c:541
541 return(len);
(gdb)
542 }
(gdb)
receive_smb (fd=13, buffer=0x26af68 "", timeout=0) at lib/util_sock.c:588
588 if (len < 0) {
(gdb)
607 if (len > (BUFFER_SIZE + LARGE_WRITEX_HDR_SIZE)) {
(gdb)
624 ret = read_socket_data(fd,buffer+4,len);
(gdb)
625 if (ret != len) {
(gdb)
632 return(True);
(gdb)
633 }
(gdb)
receive_message_or_smb (buffer=0x26af68 "", buffer_len=131137,
timeout=60000) at smbd/process.c:271
271 }
(gdb)
smbd_process () at smbd/process.c:1267
1267 num_echos = smb_echo_count;
(gdb)
1269 process_smb(InBuffer, OutBuffer);
(gdb)
Program received signal SIGSEGV, Segmentation fault.
0xff132e84 in strcmp () from /usr/lib/libc.so.1
(gdb)
Single stepping until exit from function strcmp,
which has no line number information.
0xff1544ec in _tzload () from /usr/lib/libc.so.1
(gdb)
Single stepping until exit from function _tzload,
which has no line number information.
0xff152df8 in _ltzset_u () from /usr/lib/libc.so.1
(gdb)
Single stepping until exit from function _ltzset_u,
which has no line number information.
0xff152994 in mktime () from /usr/lib/libc.so.1
(gdb)
Single stepping until exit from function mktime,
which has no line number information.
0xff1736dc in strftime () from /usr/lib/libc.so.1
(gdb)
Single stepping until exit from function strftime,
which has no line number information.
timestring (hires=0) at lib/time.c:709
709 }
(gdb)
dbghdr (level=0, file=0x1c18e0 "lib/fault.c", func=0x1c18f0 "fault_report",
line=36) at lib/debug.c:956
956 errno = old_errno;
(gdb)
957 return( True );
(gdb)
958 }
(gdb)
fault_report (sig=11) at lib/fault.c:37
37 DEBUG(0,("INTERNAL ERROR: Signal %d in pid %d
(%s)",sig,(int)sys_getpid(),VERSION));
(gdb)
38 DEBUG(0,("\nPlease read the file BUGS.txt in the
distribution\n"));
(gdb)
39
DEBUG(0,("===============================================================\n"
));
(gdb)
41 smb_panic("internal error");
(gdb)
Program received signal SIGABRT, Aborted.
0xff19c724 in _libc_kill () from /usr/lib/libc.so.1
(gdb)
Single stepping until exit from function _libc_kill,
which has no line number information.
procfs: couldn't stop process 84866: wait returned -1
-----Original Message-----
From: Esh, Andrew [mailto:AEsh at tricord.com]
Sent: Tuesday, July 02, 2002 11:10 AM
To: 'David Shapiro'; 'Andrew Bartlett'
Cc: 'Richard Sharpe'; 'samba-technical at lists.samba.org'
Subject: RE: sessionid.tdb missing after build and client read failutre
Don't step at that point. The process has already run the CPU into the wrong
segment, or accessed memory using a bad pointer. Stepping will only destroy
information.
Do a 'bt' instead. That will dump the call stack, and show what path the
code ran to get to this point. What I expect to see is somewhere above the
strcmp routine, a Samba routine will call strcmp with a bad pointer, or a
non-terminated string buffer. We need to know which routine did that.
-----Original Message-----
From: David Shapiro [ mailto:david.shapiro at btitele.com
<mailto:david.shapiro at btitele.com> ]
Sent: Tuesday, July 02, 2002 9:17 AM
To: 'Andrew Bartlett'; David Shapiro
Cc: 'Richard Sharpe'; 'samba-technical at lists.samba.org'
Subject: RE: sessionid.tdb missing after build and client read failutre
Trying to get better at this gdb here. I see a segmentation fault:
which has no line number information.
Program received signal SIGSEGV, Segmentation fault.
0xff132e84 in strcmp () from /usr/lib/libc.so.1
(gdb) step
Single stepping until exit from function strcmp,
which has no line number information.
0xff1544ec in _tzload () from /usr/lib/libc.so.1
(gdb) step
Single stepping until exit from function _tzload,
which has no line number information.
0xff152df8 in _ltzset_u () from /usr/lib/libc.so.1
(gdb) step
Single stepping until exit from function _ltzset_u,
which has no line number information.
0xff152994 in mktime () from /usr/lib/libc.so.1
(gdb) step
Single stepping until exit from function mktime,
which has no line number information.
0xff1736dc in strftime () from /usr/lib/libc.so.1
(gdb) step
Single stepping until exit from function strftime,
which has no line number information.
0x136db0 in timestring ()
(gdb) step
Single stepping until exit from function timestring,
-----Original Message-----
From: Andrew Bartlett [ mailto:abartlet at samba.org
<mailto:abartlet at samba.org> ]
Sent: Tuesday, July 02, 2002 9:01 AM
To: David Shapiro
Cc: 'Andrew Bartlett'; 'Richard Sharpe';
'samba-technical at lists.samba.org'
Subject: Re: sessionid.tdb missing after build and client read failutre
David Shapiro wrote:
>
> Thank you Andrew. I was looking at joining because it was mentioned that
to
> get sessionid.tdb, you needed to join domain. I looked ing smbd.log and
saw
> a connection from davidsha, and then in my workstation log and saw at the
> bottom:
>
> ===============================================================
> [2002/07/02 08:40:53, 0] lib/fault.c:fault_report(37)
> INTERNAL ERROR: Signal 11 in pid 8127 (3.0-alpha17)
> Please read the file BUGS.txt in the distribution
> [2002/07/02 08:40:53, 0] lib/fault.c:fault_report(39)
> ===============================================================
>
> I also keep getting an xterm session pop up that says:
>
> xterm: Can't execvp /usr/local/bin/gdb
>
> I think this comes from the line in smb.conf:
>
> panic action = /usr/openwin/bin/xterm -display $DISPLAY -e
> /usr/local/bin/gbd -p %d
>
> gdb is in /usr/local/bin. What does it mean it can't execvp it?
I dunno - but just make it a simple 'panic action = /bin/sleep 9000' and
attach manually. Then lets look at it from there.
Andrew Bartlett
--
Andrew Bartlett abartlet at pcug.org.au
Manager, Authentication Subsystems, Samba Team abartlet at samba.org
Student Network Administrator, Hawker College abartlet at hawkerc.net
http://samba.org <http://samba.org> http://build.samba.org
<http://build.samba.org> http://hawkerc.net <http://hawkerc.net>
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