Samba4 panic action

[Andrew Bartlett]

On Fri, 2012-10-12 at 12:03 +0200, steve wrote:
> On 11/10/12 21:21, Jeremy Allison wrote:
> > On Thu, Oct 11, 2012 at 06:30:27PM +0200, steve wrote:
> >> On 11/10/12 13:32, Andrew Bartlett wrote:
> >>> On Thu, 2012-10-11 at 13:18 +0200, steve wrote:
> >>>> Version 4.1.0pre1-GIT-957f9fa
> >>>> Hi
> >>>> Accessing shares on the s3fs server from a w7 client hangs with this:
> >>>
> >>> Thanks for testing this, and I'm sorry this caused you trouble.
> >>>
> >>> The attached patch fixes the changes I made earlier today, and is in
> >>> autobuild.
> >>>
> >>> Andrew Bartlett
> >>>
> >> Hi
> >> I applied the patch and all is well for W7 but now XP hangs with
> >> this as soon as anything is read from the file server:
> >> ]
> >> /usr/local/samba/sbin/smbd:
> >
> > Can you build with -g please and attach with gdb to get a
> > backtrace with line numbers ?
> >
> > Thanks !
> >
> > Jeremy.
> >
> Hi Jeremy
> I found the bug was with LibreOffice (LO):
> https://bugs.freedesktop.org/show_bug.cgi?id=54528
> 
> LO v3.6.1 crashes windows explorer which must in turn must panic smbd. I 
> installed LO 3.5.6 and now there is no panic.
> I'll try LO 3.6.2 and gdb it if it panics.

If any client can panic us, under any situation, it is a bug we can and
will fix.

> BTW could you explain 'build with -g'?

The build you have is fine (only developer builds, which use -g, give
the previous panic you got), you just need to get us the backtrace by
attaching to the 'stuck' process using:

gdb -p PID

bt full

or following hints given here previously to use the gdb_backtrace script
from selftest/ as the panic action. 

Andrew Bartlett

-- 
Andrew Bartlett                                http://samba.org/~abartlet/
Authentication Developer, Samba Team           http://samba.org