Re: [stable] vfs: deal with deadlock in d_walk()

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On 01/11/2015, 10:12 PM, Ben Hutchings wrote:
> These upstream commits:
> 
> commit 946e51f2bf37f1656916eb75bd0742ba33983c28 Author: Al Viro
> <viro@xxxxxxxxxxxxxxxxxx> Date:   Sun Oct 26 19:19:16 2014 -0400
> 
> move d_rcu from overlapping d_child to overlapping d_alias
> 
> commit ca5358ef75fc69fee5322a38a340f5739d997c10 Author: Al Viro
> <viro@xxxxxxxxxxxxxxxxxx> Date:   Sun Oct 26 19:31:10 2014 -0400
> 
> deal with deadlock in d_walk()
> 
> fix a local denial-of-service vulnerability, designated
> CVE-2014-8559.
> 
> So far, they have only been applied in stable versions 3.18.1 and
> (with substantial changes) 3.2.66.  However, according to 
> <https://lkml.org/lkml/2014/10/25/179> the bug was introduced by
> "fs: dcache avoid starvation in dcache multi-step operations", i.e.
> commit 58db63d08679 in 2.6.38-rc1.  So all the 3.x branches should
> be fixed.

I have just applied the two patches to 3.12. I have taken backports
from SLE12.

thanks,
- -- 
js
suse labs
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