On Mon, Jun 21, 2021 at 01:28:20PM +0200, Marc Kleine-Budde wrote:
> On 21.06.2021 13:24:51, Marc Kleine-Budde wrote:
> > From: Tetsuo Handa <penguin-kernel@xxxxxxxxxxxxxxxxxxx>
> >
> > commit 8d0caedb759683041d9db82069937525999ada53 upstream
> >
> > syzbot is reporting hung task at register_netdevice_notifier() [1] and
> > unregister_netdevice_notifier() [2], for cleanup_net() might perform
> > time consuming operations while CAN driver's raw/bcm/isotp modules are
> > calling {register,unregister}_netdevice_notifier() on each socket.
> >
> > Change raw/bcm/isotp modules to call register_netdevice_notifier() from
> > module's __init function and call unregister_netdevice_notifier() from
> > module's __exit function, as with gw/j1939 modules are doing.
> >
> > Link: https://syzkaller.appspot.com/bug?id=391b9498827788b3cc6830226d4ff5be87107c30 [1]
> > Link: https://syzkaller.appspot.com/bug?id=1724d278c83ca6e6df100a2e320c10d991cf2bce [2]
> > Link: https://lore.kernel.org/r/54a5f451-05ed-f977-8534-79e7aa2bcc8f@xxxxxxxxxxxxxxxxxxx
> > Cc: linux-stable <stable@xxxxxxxxxxxxxxx>
> > Reported-by: syzbot <syzbot+355f8edb2ff45d5f95fa@xxxxxxxxxxxxxxxxxxxxxxxxx>
> > Reported-by: syzbot <syzbot+0f1827363a305f74996f@xxxxxxxxxxxxxxxxxxxxxxxxx>
> > Reviewed-by: Kirill Tkhai <ktkhai@xxxxxxxxxxxxx>
> > Tested-by: syzbot <syzbot+355f8edb2ff45d5f95fa@xxxxxxxxxxxxxxxxxxxxxxxxx>
> > Tested-by: Oliver Hartkopp <socketcan@xxxxxxxxxxxx>
> > Signed-off-by: Tetsuo Handa <penguin-kernel@xxxxxxxxxxxxxxxxxxx>
> > [mkl: ported to v4.19.195]
> > Signed-off-by: Marc Kleine-Budde <mkl@xxxxxxxxxxxxxx>
> > ---
> > Hello Greg,
> >
> > this is a backport of
> >
> > | 8d0caedb7596 can: bcm/raw/isotp: use per module netdevice notifier
> >
> > to v4.19.195. Please apply.
>
> This also applies to v4.14.237.
>
> I'm working on a v4.9 version.
All now applied, thanks!
greg k-h
