Possible system crash running Ubuntu LTS kernel 3.13.0-77 and Samba

[Ben Hutchings]

On Sun, 2016-02-14 at 11:51 +0100, Thomas Bork wrote:
> Am 10.02.2016 um 12:18 schrieb Karolin Seeger:
> 
> > this is a heads-up that we have seen some system crashes after updating
> > to Ubuntu LTS kernel 3.13.0-77 on systems running Samba.
> > 
> > It looks like a kernel bug triggered by Samba calls.
> > A bug report has been created [1].
> > 
> > Downgrading to kernel 3.13.0-76 solves the problem.
> > 
> > [1] https://bugs.launchpad.net/ubuntu/+source/linux-lts-trusty/+bug/1543980
> 
> I want to let you know that some of our samba users have a similar 
> problem after switching the kernel from 3.2.74 to 3.2.76:
[...]
> This stalls later on seams to leading to a memory leak till the 
> oom-killer kills processes and the machines crashes.
> 
> Downgrading to kernel 3.2.74 solves the problem.
> 
> After reading
> 
> https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1543980
> https://forge.univention.org/bugzilla/show_bug.cgi?id=40558
> https://patchwork.ozlabs.org/patch/582017/
> 
> I think the patch
> 
> > https://git.kernel.org/cgit/linux/kernel/git/stable/linux-stable.git/commit/net/unix/af_unix.c?id=a3b0f6e8a21ef02f69a15abac440572d8cde8c2a
> 
> in 3.2.75 is the problem.

I think it's fixed by this kernel patch:
http://mid.gmane.org/87r3gj11jc.fsf_-_@doppelsaurus.mobileactivedefense.com

Assuming it's applied upstream, it will get into stable updates in due
course.  I've also queued this up for inclusion in Debian security
updates.

Ben.

-- 
Ben Hutchings
Sturgeon's Law: Ninety percent of everything is crap.
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