netdev - Re: [PATCH net 0/3] net/sched Bind logic fixes for cls_fw, cls_u32 and cls

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Date: Sun, 23 Jul 2023 14:25:07 +0700
From: M A Ramdhan <ramdhan@...rlabs.sg>
To: Jamal Hadi Salim <jhs@...atatu.com>
Cc: Pedro Tammela <pctammela@...atatu.com>, valis <sec@...is.email>, netdev@...r.kernel.org, 
	xiyou.wangcong@...il.com, jiri@...nulli.us, davem@...emloft.net, 
	edumazet@...gle.com, kuba@...nel.org, pabeni@...hat.com, victor@...atatu.com, 
	billy@...rlabs.sg
Subject: Re: [PATCH net 0/3] net/sched Bind logic fixes for cls_fw, cls_u32
 and cls_route

On Sat, Jul 22, 2023 at 2:56 AM Jamal Hadi Salim <jhs@...atatu.com> wrote:
>
> On Fri, Jul 21, 2023 at 3:00 PM Pedro Tammela <pctammela@...atatu.com> wrote:
> >
> > On 21/07/2023 14:48, valis wrote:
> > > Three classifiers (cls_fw, cls_u32 and cls_route) always copy
> > > tcf_result struct into the new instance of the filter on update.
> > >
> > > This causes a problem when updating a filter bound to a class,
> > > as tcf_unbind_filter() is always called on the old instance in the
> > > success path, decreasing filter_cnt of the still referenced class
> > > and allowing it to be deleted, leading to a use-after-free.
> > >
> > > This patch set fixes this issue in all affected classifiers by no longer
> > > copying the tcf_result struct from the old filter.
> > >
> > > valis (3):
> > >    net/sched: cls_u32: No longer copy tcf_result on update to avoid
> > >      use-after-free
> > >    net/sched: cls_fw: No longer copy tcf_result on update to avoid
> > >      use-after-free
> > >    net/sched: cls_route: No longer copy tcf_result on update to avoid
> > >      use-after-free
> > >
> > >   net/sched/cls_fw.c    | 1 -
> > >   net/sched/cls_route.c | 1 -
> > >   net/sched/cls_u32.c   | 1 -
> > >   3 files changed, 3 deletions(-)
> > >
> >
> > For the series,
> >
> > Reviewed-by: Pedro Tammela <pctammela@...atatu.com>
> > Tested-by: Pedro Tammela <pctammela@...atatu.com>
>
> For the series:
> Acked-by: Jamal Hadi Salim <jhs@...atatu.com>

For the series:
Reviewed-by: M A Ramdhan <ramdhan@...rlabs.sg>
Tested-by: M A Ramdhan <ramdhan@...rlabs.sg>

Regards,
M A Ramdhan

>
> cheers,
> jamal