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Date: Mon, 13 Aug 2018 11:24:17 +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: <20180813092417.GC6381@kroah.com>
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 <20180813092325.GB6381@kroah.com>
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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.

Ok, you listed the in the paragraph above, sorry I missed that.  Putting
it in the patch itself makes it more obvious what is going on here...

thanks,

greg k-h