samba - Apr 2013 - Samba crash (while logging in as administrator?)

I just had samba4 (git 69b3d19 from yesterday) crash while logging in as
administrator.

The login stalled, and on the samba4 AD DC, winbind stopped responding --
"getent passwd" stopped showing the domain entries, and commands that
showed some samba users (e.g. "ls" in a directory with domain owners,
"htop", etc.) would hang.


dmesg shows:

traps: samba[3728] trap invalid opcode ip:7fbaaff2e780 sp:7fff6859f158
error:0 in libservice.so[7fbaaff29000+7000]


I'll follow up if I can reproduce this, just wanted to start a thread in
case anyone else sees this.

- Nick

On Wed, Apr 10, 2013 at 09:26:45PM -0500, Nick Semenkovich
wrote:
> I just had samba4 (git 69b3d19 from yesterday) crash while logging in as
> administrator.
> 
> The login stalled, and on the samba4 AD DC, winbind stopped responding --
> "getent passwd" stopped showing the domain entries, and commands
that
> showed some samba users (e.g. "ls" in a directory with domain
owners,
> "htop", etc.) would hang.
> 
> 
> dmesg shows:
> 
> traps: samba[3728] trap invalid opcode ip:7fbaaff2e780 sp:7fff6859f158
> error:0 in libservice.so[7fbaaff29000+7000]
> 
> 
> I'll follow up if I can reproduce this, just wanted to start a thread
in
> case anyone else sees this.
Is there any way we can get a backtrace from this? Also,
which platform are you running on? "invalid opcode", that
kindof sounds like a compiler bug. I know that usually all
compiler "bugs" turn out to be just plain program defects,
so would it be possible that you run it under valgrind, just
to make sure we don't overwrite memory we are not supposed
to overwrite?

Volker

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