Re: [PATCH v2] media: nxp: imx8-isi: fix memory leaks in probe error paths and remove

[Greg KH <greg@kroah.com>]

On Sat, Mar 28, 2026 at 11:15:18AM +0000, David CARLIER wrote:
> On Sat, 28 Mar 2026 at 10:21, Greg KH <greg@kroah.com> wrote:
> >
> > On Sat, Mar 28, 2026 at 10:00:10AM +0000, David Carlier wrote:
> > > mxc_isi_probe() allocates isi->pipes with kzalloc_objs() but never
> > > frees it on any probe failure path or in mxc_isi_remove(), leaking the
> > > allocation on every failed probe and every normal unbind.
> > >
> > > Additionally, when mxc_isi_pipe_init() fails partway through the
> > > channel loop or when mxc_isi_v4l2_init() fails, the already initialized
> > > pipes are not cleaned up — their media entities and mutexes are leaked.
> > >
> > > Fix both by adding kfree(isi->pipes) to all probe error paths and to
> > > mxc_isi_remove(), and cleaning up already-initialized pipes in the
> > > err_xbar error path.
> > >
> > > Fixes: cf21f328fcaf ("media: nxp: Add i.MX8 ISI driver")
> > > Signed-off-by: David Carlier <devnexen@gmail.com>
> > > ---
> >
> > <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.
> 
> Apologies for the confusion — I wasn't submitting this for stable
> inclusion directly. The Cc was added based on CI bot feedback since
> the Fixes target is in the
>   stable tree, but I understand the correct flow is to let it go
> through the maintainer tree first and let the Fixes tag handle stable
> backporting.

If you read the above, "Fixes:" does not guarantee backporting at all,
so NEVER rely on that if you know you want something applied to a stable
kernel tree.

thanks,

greg k-h