Re: [PATCH 0/3 stable 4.9] proc/sysctl: prune stale dentries during unregistering

[Mike Rapoport <rppt@linux.vnet.ibm.com>]

On Mon, Aug 13, 2018 at 07:13:12PM +0200, Greg KH wrote:
> On Mon, Aug 13, 2018 at 01:04:24PM +0300, Mike Rapoport wrote:
> > On Mon, Aug 13, 2018 at 11:23:25AM +0200, Greg KH wrote:
> > > On Mon, Aug 13, 2018 at 12:08:15PM +0300, Mike Rapoport wrote:
> > > > Hi,
> > > > 
> > > > These patches fix a memory leak in per-cpu areas in v4.9.y
> > > > 
> > > > The following command sequence
> > > > 
> > > > while :; do
> > > >         c=$(docker create busybox)
> > > >         docker start $c
> > > >         docker stop $c
> > > >         docker rm $c
> > > > done
> > > > 
> > > > causes the number of pcpu_get_vm_area entries in /proc/vmallocinfo to grow.
> > > > 
> > > > The commit d6cffbbe9a7e ("proc/sysctl: prune stale dentries during
> > > > unregistering") fixes the issue and the commits ace0c791e6c3 ("proc/sysctl:
> > > > Don't grab i_lock under sysctl_lock.") and 2fd1d2c4ceb2 ("proc: Fix
> > > > proc_sys_prune_dcache to hold a sb reference") are the follow-up fixups.
> > > > 
> > > > I've also checked v4.4 and the issue does not appear there.
> > > > 
> > > > Eric W. Biederman (2):
> > > >   proc/sysctl: Don't grab i_lock under sysctl_lock.
> > > >   proc: Fix proc_sys_prune_dcache to hold a sb reference
> > > > 
> > > > Konstantin Khlebnikov (1):
> > > >   proc/sysctl: prune stale dentries during unregistering
> > > 
> > > What is the git commit ids of these patches that are in Linus's tree?  I
> > > need those to be able to apply this.
> > 
> > d6cffbbe9a7e ("proc/sysctl: prune stale dentries during unregistering")
> > ace0c791e6c3 ("proc/sysctl: Don't grab i_lock under sysctl_lock.")
> > 2fd1d2c4ceb2 ("proc: Fix proc_sys_prune_dcache to hold a sb reference")
> 
> Thanks, now queued up. Any reason why you did not sign off on the
> backports?

They've applied cleanly, I didn't really work in the backporting, only on
the bisecting :)
 
> greg k-h
> 

-- 
Sincerely yours,
Mike.