issue about bug 1480199 Samba crashed in internal background task execution while running IO

[Jeremy Allison]

On Wed, Mar 28, 2018 at 09:10:03PM +0800, ssdl.566 via samba-technical wrote:
> 
> 
> Hi all :
>           Recently .we met the issue the same as :
>           https://bugzilla.redhat.com/show_bug.cgi?id=1480199#c7
>           that when start smb service, smbd will crash 
> 
> 
>           the trace is as follows:
> #0  0x00007fc078e651f7 in raise () from /lib64/libc.so.6
> #1  0x00007fc078e668e8 in abort () from /lib64/libc.so.6
> #2  0x00007fc07a7c7ccb in dump_core () at ../source3/lib/dumpcore.c:322
> #3  0x00007fc07a7bb087 in smb_panic_s3 (why=<optimized out>) at ../source3/lib/util.c:814
> #4  0x00007fc07ccb059f in smb_panic (why=why at entry=0x7fc07ccf758a "internal error") at ../lib/util/fault.c:166
> #5  0x00007fc07ccb07b6 in fault_report (sig=<optimized out>) at ../lib/util/fault.c:83
> #6  sig_fault (sig=<optimized out>) at ../lib/util/fault.c:94
> #7  <signal handler called>
> #8  0x0000000000000000 in ?? ()
> #9  0x00007fc0791fcc97 in tevent_common_loop_timer_delay () from /lib64/libtevent.so.0
> #10 0x00007fc07a7d04e9 in run_events_poll (ev=0x7fc07f0104d0, pollrtn=0, pfds=0x0, num_pfds=0) at ../source3/lib/events.c:199
> #11 0x00007fc07a7d0644 in s3_event_loop_once (ev=0x7fc07f0104d0, location=<optimized out>) at ../source3/lib/events.c:303
> #12 0x00007fc0791f80cd in _tevent_loop_once () from /lib64/libtevent.so.0
> #13 0x00007fc0791f945f in tevent_req_poll () from /lib64/libtevent.so.0
> #14 0x00007fc07d34d9a3 in cleanupd_init (msg=msg at entry=0x7fc07f010600, interactive=interactive at entry=false, 
>     ppid=ppid at entry=0x7fc07f017000) at ../source3/smbd/server.c:515
> 
> 
>            I want to know did anyone meet the problem? is there a patch to solve it?

There's nothing on the bug report that shows any investigation
was done. Can you reproduce ? If so, can you use "panic action"
to get a good backtrace with symbols ?

Thanks,

	Jeremy.