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Re: 4.4rc3 nfsd/btrfs kasan warning.

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On Wed, Dec 02, 2015 at 11:09:43AM -0500, Dave Jones wrote:
> On Wed, Dec 02, 2015 at 10:11:28AM -0500, Josef Bacik wrote:
>  > On 12/02/2015 09:59 AM, Dave Jones wrote:
>  > > Got a few of these in the logs this morning after an overnight rsync over nfs
>  > > to an exported btrfs volume.
>  > 
>  > That's probably us and not NFS, what line is that in 
>  > setup_cluster_bitmap?  Thanks,
> 
> If my math is correct, it's this..
> 
>         if (entry->offset != bitmap_offset)
> 
> I don't seem to be able to trigger it on demand unfortunatly.

Is it possible we're blowing the stack?  It seems pretty tricky to get a
stack out of bounds out of this code without flat out blowing through
it.

-chris

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4.4rc3 nfsd/btrfs kasan warning. Dave Jones <davej@codemonkey.org.uk> - 2015-12-02 16:00 +0100
  Re: 4.4rc3 nfsd/btrfs kasan warning. Josef Bacik <jbacik@fb.com> - 2015-12-02 16:20 +0100
    Re: 4.4rc3 nfsd/btrfs kasan warning. Dave Jones <davej@codemonkey.org.uk> - 2015-12-02 17:20 +0100
      Re: 4.4rc3 nfsd/btrfs kasan warning. Chris Mason <clm@fb.com> - 2015-12-02 18:20 +0100
        Re: 4.4rc3 nfsd/btrfs kasan warning. Dave Jones <davej@codemonkey.org.uk> - 2015-12-02 18:40 +0100
        Re: 4.4rc3 nfsd/btrfs kasan warning. Andrey Ryabinin <ryabinin.a.a@gmail.com> - 2015-12-02 19:40 +0100
          Re: 4.4rc3 nfsd/btrfs kasan warning. Chris Mason <clm@fb.com> - 2015-12-02 20:10 +0100

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