RHEL6 init.d script (was Re: Initscript Debian Wheezy)

Thu Sep 6 12:55:23 MDT 2012

Hi,

I'm having the exact same problem. I've been getting the following panic
running samba 4 with s3fs. The system is Ubuntu Linux 11.10 x86-64 running
samba version 4.0.0beta9-GIT-a3b67e5. Backtrace using panic action =
/path/to/gdb_backtrace %d in smb.conf returned nothing in the logs and I
wasn't able to run samba under gdb as I needed the file server to be
functional asap. I did, however, run gdb_backtrace manually with the pid of
one of the smbd process which did panic. gdb_backtrace output is here
http://pastebin.com/Kjymcckg .

This was in log.smbd:

[2012/09/04 14:41:07.217180,  0]
../source3/lib/popt_common.c:67(popt_s3_talloc_log_fn)
  Bad talloc magic value - access after free
[2012/09/04 14:41:07.217279,  0] ../source3/lib/util.c:810(smb_panic_s3)
  PANIC (pid 17355): Bad talloc magic value - access after free
[2012/09/04 14:41:07.218110,  0] ../source3/lib/util.c:921(log_stack_trace)
  BACKTRACE: 37 stack frames:
   #0 /usr/local/samba/lib/libsmbconf.so.0(log_stack_trace+0x1f)
[0x7f31e5adca71]
   #1 /usr/local/samba/lib/libsmbconf.so.0(smb_panic_s3+0x6e)
[0x7f31e5adc8bf]
   #2 /usr/local/samba/lib/libsamba-util.so.0(smb_panic+0x28)
[0x7f31e791d0ca]
   #3 /usr/local/samba/lib/private/libtalloc.so.2(+0x1f7f) [0x7f31e6d7df7f]
   #4 /usr/local/samba/lib/private/libtalloc.so.2(+0x1ffb) [0x7f31e6d7dffb]
   #5 /usr/local/samba/lib/private/libtalloc.so.2(+0x2078) [0x7f31e6d7e078]
   #6 /usr/local/samba/lib/private/libtalloc.so.2(_talloc_free+0x36)
[0x7f31e6d7ff2d]
   #7 /usr/local/samba/lib/private/libsmbd_base.so(+0x16a7f2)
[0x7f31e70ef7f2]
   #8 /usr/local/samba/lib/private/libtalloc.so.2(+0x2ba9) [0x7f31e6d7eba9]
   #9 /usr/local/samba/lib/private/libtalloc.so.2(+0x3c00) [0x7f31e6d7fc00]
   #10 /usr/local/samba/lib/private/libtalloc.so.2(+0x2d4c) [0x7f31e6d7ed4c]
   #11 /usr/local/samba/lib/private/libtalloc.so.2(+0x3c00) [0x7f31e6d7fc00]
   #12 /usr/local/samba/lib/private/libtalloc.so.2(+0x2d4c) [0x7f31e6d7ed4c]
   #13 /usr/local/samba/lib/private/libtalloc.so.2(+0x3c00) [0x7f31e6d7fc00]
   #14 /usr/local/samba/lib/private/libtalloc.so.2(+0x2d4c) [0x7f31e6d7ed4c]
   #15 /usr/local/samba/lib/private/libtalloc.so.2(+0x3c00) [0x7f31e6d7fc00]
   #16 /usr/local/samba/lib/private/libtalloc.so.2(+0x2d4c) [0x7f31e6d7ed4c]
   #17 /usr/local/samba/lib/private/libtalloc.so.2(_talloc_free+0x102)
[0x7f31e6d7fff9]
   #18 /usr/local/samba/lib/private/libsmbd_base.so(+0x18b019)
[0x7f31e7110019]
   #19 /usr/local/samba/lib/private/libsmbd_base.so(+0x18b24c)
[0x7f31e711024c]
   #20 /usr/local/samba/sbin/smbd() [0x40823b]
   #21 /usr/local/samba/lib/libsmbconf.so.0(messaging_dispatch_rec+0x83)
[0x7f31e5ae5dc1]
   #22 /usr/local/samba/lib/libsmbconf.so.0(+0x2d259) [0x7f31e5ae7259]
   #23 /usr/local/samba/lib/libsmbconf.so.0(+0x2be87) [0x7f31e5ae5e87]
   #24
/usr/local/samba/lib/private/libtevent.so.0(tevent_common_check_signal+0x213)
[0x7f31e5d4c2ff]
   #25 /usr/local/samba/lib/libsmbconf.so.0(run_events_poll+0x2f)
[0x7f31e5af9ad8]
   #26 /usr/local/samba/lib/libsmbconf.so.0(+0x4037b) [0x7f31e5afa37b]
   #27 /usr/local/samba/lib/private/libtevent.so.0(_tevent_loop_once+0xe4)
[0x7f31e5d47f0a]
   #28 /usr/local/samba/lib/private/libsmbd_base.so(smbd_process+0x1309)
[0x7f31e70d1b80]
   #29 /usr/local/samba/sbin/smbd() [0x409570]
   #30 /usr/local/samba/lib/libsmbconf.so.0(run_events_poll+0x716)
[0x7f31e5afa1bf]
   #31 /usr/local/samba/lib/libsmbconf.so.0(+0x40456) [0x7f31e5afa456]
   #32 /usr/local/samba/lib/private/libtevent.so.0(_tevent_loop_once+0xe4)
[0x7f31e5d47f0a]
   #33 /usr/local/samba/sbin/smbd() [0x40a1b7]
   #34 /usr/local/samba/sbin/smbd(main+0x1567) [0x40b870]
   #35 /lib/x86_64-linux-gnu/libc.so.6(__libc_start_main+0xed)
[0x7f31e437d30d]
   #36 /usr/local/samba/sbin/smbd() [0x4052a9]
[2012/09/04 14:41:07.219719,  0] ../source3/lib/util.c:822(smb_panic_s3)
  smb_panic(): calling panic action [/bin/sleep 999999999]

Let me know if anything else is needed and thanks for your help in advance.

On Thu, Sep 6, 2012 at 10:52 AM, Ricky Nance <
ricky.nance at weaubleau.k12.mo.us> wrote:

> Sorry that was a pastefail!...  http://paste.ubuntu.com/1189110/
>
> On Thu, Sep 6, 2012 at 12:48 PM, Jeremy Allison <jra at samba.org> wrote:
>
> > On Thu, Sep 06, 2012 at 10:23:03AM -0500, Ricky Nance wrote:
> > > Marc, odd thing happened to me just now. I just spent the last 20 mins
> > > troubleshooting slow/unresponsive windows machines (across the network)
> > > because smbd 'hung' and samba had died (well I had restarted it and
> smbd
> > > didn't die as it should have). Not trying to be snide with this, but
> > please
> > > explain to me again how this can't happen? Check the last couple of
> lines
> > > here http://paste.ubuntu.com/1189108/ . I agree with you this
> shouldn't
> > > ever be a problem, but it is on occasion, and the init script didn't
> > > perform as expected (making sure the processes are actually dead before
> > say
> > > 'OK' on the stop line). Also, there has never been an ability to run
> smbd
> > > and samba at the same time unless samba spawned it (otherwise samba
> just
> > > fails to run right if smbd is running first), and I am always within a
> > few
> > > days of the current git as I am constantly testing things for the
> > project.
> > > As for the PID causing samba to not start that I was referring to, I
> > think
> > > it must have been this commit
> > >
> >
> http://gitweb.samba.org/?p=samba.git;a=commit;h=d6bba7bf1a77244bc47eaeef67bb9680175ec0bcbut
> > > I do recall something that Jeremy Allison patched (I think) so this
> > > may
> > > not be the one I am thinking of, but either way that issue has been
> > > resolved.
> > >
> > > Here is a backtrace of the smbd process that had died, but failed to
> > > terminate.. http://paste.ubuntu.com/1189108/
> >
> > That isn't a backtrace, it's a process list.
> >
> > Jeremy.
> >
>
>
>
> --
>