netdev - Re: mlx5 XDP redirect leaking memory on kernel 6.3

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Date: Mon, 17 Jul 2023 16:42:00 +0200
From: "gregkh@...uxfoundation.org" <gregkh@...uxfoundation.org>
To: Dragos Tatulea <dtatulea@...dia.com>
Cc: "jbrouer@...hat.com" <jbrouer@...hat.com>,
	"atzin@...hat.com" <atzin@...hat.com>,
	"linyunsheng@...wei.com" <linyunsheng@...wei.com>,
	"saeed@...nel.org" <saeed@...nel.org>,
	"ttoukan.linux@...il.com" <ttoukan.linux@...il.com>,
	"maxtram95@...il.com" <maxtram95@...il.com>,
	"kheib@...hat.com" <kheib@...hat.com>,
	"brouer@...hat.com" <brouer@...hat.com>,
	"jbenc@...hat.com" <jbenc@...hat.com>,
	"alexander.duyck@...il.com" <alexander.duyck@...il.com>,
	"bpf@...r.kernel.org" <bpf@...r.kernel.org>,
	"ilias.apalodimas@...aro.org" <ilias.apalodimas@...aro.org>,
	Tariq Toukan <tariqt@...dia.com>,
	"netdev@...r.kernel.org" <netdev@...r.kernel.org>,
	"fmaurer@...hat.com" <fmaurer@...hat.com>,
	Saeed Mahameed <saeedm@...dia.com>,
	"mkabat@...hat.com" <mkabat@...hat.com>,
	"lorenzo@...nel.org" <lorenzo@...nel.org>
Subject: Re: mlx5 XDP redirect leaking memory on kernel 6.3

On Mon, Jul 17, 2023 at 02:37:44PM +0000, Dragos Tatulea wrote:
> On Thu, 2023-07-13 at 17:31 +0200, Greg KH wrote:
> > On Thu, Jul 13, 2023 at 04:58:04PM +0200, Jesper Dangaard Brouer wrote:
> > > 
> > > 
> > > On 13/07/2023 12.11, Dragos Tatulea wrote:
> > > > Gi Jesper,
> > > > On Thu, 2023-07-13 at 11:20 +0200, Jesper Dangaard Brouer wrote:
> > > > > Hi Dragos,
> > > > > 
> > > > > Below you promised to work on a fix for XDP redirect memory leak...
> > > > > What is the status?
> > > > > 
> > > > The fix got merged into net a week ago:
> > > > https://git.kernel.org/pub/scm/linux/kernel/git/netdev/net.git/commit/drivers/net/ethernet/mellanox/mlx5/core?id=7abd955a58fb0fcd4e756fa2065c03ae488fcfa7
> > > > 
> > > > Just forgot to follow up on this thread. Sorry about that...
> > > > 
> > > 
> > > Good to see it being fixed in net.git commit:
> > >  7abd955a58fb ("net/mlx5e: RX, Fix page_pool page fragment tracking for
> > > XDP")
> > > 
> > > This need to be backported into stable tree 6.3, but I can see 6.3.13 is
> > > marked EOL (End-of-Life).
> > > Can we still get this fix applied? (Cc. GregKH)
> > 
> > <formletter>
> > 
> > This is not the correct way to submit patches for inclusion in the
> > stable kernel tree.  Please read:
> >     https://www.kernel.org/doc/html/latest/process/stable-kernel-rules.html
> > for how to do this properly.
> > 
> > </formletter>
> So...I am a bit confused: should I send the patch to stable for 6.13 according
> to the stable submission rules or is it too late?

There is no "6.13" kernel version yet, that should not happen for
another year or so.

If you mean the "6.3.y" tree, yes, there is nothing to do here as that
tree is end-of-life and you should have moved to the 6.4.y kernel tree
at this point in time.

What is preventing you from moving?

thanks,

greg k-h