Re: [RFC 1/1] shiftfs: uid/gid shifting bind mount

[Serge E. Hallyn]

On Mon, May 16, 2016 at 10:28:32PM -0400, James Bottomley wrote:
> On Mon, 2016-05-16 at 19:41 +0000, Serge Hallyn wrote:
> > Hey James,
> > 
> > I probably did something wrong - but i applied your patch onto 4.6,
> > compiled in shiftfs, did
> > 
> > mount -t shiftfs -o uidmap=0:100000:65536,gidmap=0:100000:65536
> > /home/ubuntu /mnt
> > 
> > and ls segfaults and gives me kernel syslog msgs like:
> 
> Hm, it looks to be something IMA related, since the SUSE default is no
> IMA and this BUG in the filesystem is to do with the IMA version of
> i_readcount_dec.  I'll recompile my kernel to see if I can reproduce. 
>  Just in case, what's the underlying filesystem on /home/ubuntu?

It was ext4