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Date: Mon, 13 Aug 2018 19:13:12 +0200
From: Greg KH <greg@kroah.com>
To: Mike Rapoport <rppt@linux.vnet.ibm.com>
Cc: stable@vger.kernel.org, James Bottomley <jejb@linux.vnet.ibm.com>
Subject: Re: [PATCH 0/3 stable 4.9] proc/sysctl: prune stale dentries during
 unregistering
Message-ID: <20180813171312.GA24864@kroah.com>
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 <20180813100423.GC769@rapoport-lnx>
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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?

greg k-h