[GIT PULL] namespace fix for v4.20-rc3

[ebiederm@xmission.com (Eric W. Biederman)]

Linus,

Please pull the for-linus branch from the git tree:

   git://git.kernel.org/pub/scm/linux/kernel/git/ebiederm/user-namespace.git for-linus

   HEAD: 1e9c75fb9c47a75a9aec0cd17db5f6dc36b58e00 mnt: fix __detach_mounts infinite loop

Benjamin Coddington noticed an unkillable busy loop in the kernel that
anyone who is sufficiently motivated can trigger.  This bug did not
exist in earlier kernels making this bug a regression.

I have tested the change personally and confirmed that the bug exists
and that the fix works.  This fix has been picked up by linux-next and
hopefully the automated testing bots and no problems have been reported
from those sources.

Ordinarily I would let something like this sit a little longer but I am
going to be away at Linux Plumbers the rest of this week and I am afraid
if I don't send the pull request now this fix will get lost.

Benjamin Coddington (1):
      mnt: fix __detach_mounts infinite loop

 fs/namespace.c | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

Eric