Backport "net/sched: cls_fw: fix NULL dereference of \"old\" filters before change()"

Backport "net/sched: cls_fw: fix NULL dereference of \"old\" filters before change()"

[Mahmoud Nagy Adam]

Hello,

Could we backport the follow up fix patch 65782b2db732 ("net/sched:
cls_fw: fix NULL dereference of "old" filters before change()") to
stable trees. The commit is fixing faeea8bbf6e9 ("net/sched: cls_fw: fix
NULL pointer dereference on shared blocks") which got backported to
5.10->6.18.

We've tested it with our AL Kernel testing over EC2 instances for
kernels 5.15->6.18.

Regards,
Mahmoud Nagy Adam

ps: I'm following option 2 approach:
https://docs.kernel.org/process/stable-kernel-rules.html#option-2
If you think it's better to send the patches I could do that (option 3).



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Re: Backport "net/sched: cls_fw: fix NULL dereference of "old" filters before change()"

[Sasha Levin]

On Sun, Jun 01, 2026 at 07:57:04PM +0200, Mahmoud Nagy Adam wrote:
> Backport "net/sched: cls_fw: fix NULL dereference of "old" filters before change()"

Now queued from mainline (65782b2db732) to 6.18.y, 6.12.y, 6.6.y, 6.1.y,
5.15.y and 5.10.y.

Thanks,
Sasha