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Date: Tue, 31 Mar 2026 18:33:58 -0700
From: Jakub Kicinski <kuba@kernel.org>
To: Kangzheng Gu <xiaoguai0992@gmail.com>
Cc: gregkh@linuxfoundation.org, davem@davemloft.net, edumazet@google.com,
 pabeni@redhat.com, horms@kernel.org, kees@kernel.org, p@1g4.org,
 netdev@vger.kernel.org, stable@vger.kernel.org,
 linux-kernel@vger.kernel.org
Subject: Re: [PATCH] net-shapers: free rollback entries using kfree_rcu
Message-ID: <20260331183358.3d6f9799@kernel.org>
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On Tue, 31 Mar 2026 15:41:28 +0800 Kangzheng Gu wrote:
> Jakub Kicinski <kuba@kernel.org> =E4=BA=8E2026=E5=B9=B43=E6=9C=8831=E6=97=
=A5=E5=91=A8=E4=BA=8C 09:15=E5=86=99=E9=81=93=EF=BC=9A
> > If dump can see NOT_VALID entries we have a bigger problem than a UAF
> > don't you think? :/ =20
> I am not sure.

Please experiment and return once you are sure.
netdevsim (netdev simulator) driver supports net_shapers, so you can
easily exercise this code in a VM.