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Fri, 21 Feb 2025 09:04:08 +0100 Message-ID: <05f3fc66-f11d-4cda-8ea3-91aac650ec20@web.de> Date: Fri, 21 Feb 2025 09:03:50 +0100 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH v2] sched: fix potential use-after-free with cfs bandwidth To: Josh Don , kernel-janitors@vger.kernel.org, Ingo Molnar , Juri Lelli , Peter Zijlstra , Vincent Guittot Cc: LKML , Ben Segall , Chengming Zhou , Daniel Bristot de Oliveira , Dietmar Eggemann , K Prateek Nayak , Mel Gorman , Steven Rostedt , Valentin Schneider References: <20250221012335.233404-1-joshdon@google.com> Content-Language: en-GB From: Markus Elfring In-Reply-To: <20250221012335.233404-1-joshdon@google.com> Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: quoted-printable X-Provags-ID: V03:K1:BG2sYxsze/PyI5uB/J0H76STggS63ytFxggW3Ax/pgQ+aFCirgX IisiqhGOJnJV8Mp0N/UwMJqlPBDBZTKxu9LiFEckEUszW4BrG0/P4zVvPrIjdGbzpKmm2Hj dHIOn2Kbg5F4HhbWgFST6sW8HHUpxZW0/q/VAhlxcQ1r3E9yvTYhoBIXdQoQIH7v3fPtEIM GFgmATuUSSBkMtZwbJIQQ== X-Spam-Flag: NO UI-OutboundReport: notjunk:1;M01:P0:qc0EudHn7Ss=;5Z0dvCw+L89pDhS4iC0RD07RBn/ gNUeoG6gWQYJswNbKFgPJWhzizM4AEQvW0POOmPvB+pD0pvlilyUnuTdhr/ZPah13nAdd+xlH q9cAJPx1jU1YKj9iwC80DzzckJ3OsWV1fimpu9CFPx8GeclrZ6ECQJbgBm5Mu978OFiajw6Df WD1BImvLMwCUjOndgLRvTESc7RnPQjWs2KUWvOS+AgziF2JLGg7JhG6EzUVJpTj8EMXGqNjnd yfKebhHZroY4ILS1uuK6K+ei08r6V5ld6pmMqN/S6x7OdGEb+//KGwCoY3HKeZld33Se9lBF3 pehVL8U3c6Y9D0GV1LXmWMPbGodhRA2TbTAZGWRR6+s+0zwaxPE4w6VpL+gYIs+ZyoSQczLCe uW+lyb5it8TojZOpiK6l3ndk8Si0ji0OzpyZR53Kz0OOAlvi+9M6jDJG0/KSIrYmcXFXrvNCs 1o/fOxFUttwL410eNGjmI2dsUoURYoN9pHmZOlfp+mk+NknjRLUtlK3RuHjPkutj9bdIVvvZq C3bXC5ya0lu+A1ew5RkU/l9OxzMZKDnKS+DRC/wElb2q3EukAT7XTftH1555QIlEQmUMM7yWv nkKmOONcCoFSX9BoreqJNjkOubBzR4H8vfjFWc2DH8Fnhk68SkBwUsvJNgWXLzGPe2z6YZqGj b0mumEOMvDEQDuI3ljEtD0vnvWGiu815A7bHf+5SQnnlbbdH5A2kPkWm2Xyf75y1y3TbjeLk4 hzNMu0UlpkApPXv4sKA0a4vD8Y3+h6cxfdMSOUTnt3j+7yPrU3ItAFnSzTgBQ5K4UfCetfwt9 we4vsTZ+OPkOAscjk6stq3CpgwHFkvJ8vdb0sJZKO5WvBHXqnXBsQMc814eG3/4FyfXvy7pzh uHcgAoN0ZBTMcEljdLqtCGrh+lZL/5tXeScPiHwJeL7KN0qy/Zs1oEqSQIVW7LpsloowJy9a1 aDRHvsluy0psHgP6vLyKunILLfKckMTtMnYzzG/hFJcc0F104H+CcRkFJl3ZidG36O/O1F/lg fkn6knCaqj7R83aGo+r6zEfzGTynWvRlZgTxN9m4anUDQ64rHOJJ8+9wehL9Jv5cA3/Yzzk7a tbp0TVJYAclcwG1FH2gieOXrsLNcGE8ECosv0/9VNGXuvRR9G737F4lVQC6PaTOUsxzZb/tWU UEaqkaQwupIQokjt6kFETLh3VykCXZ/uEJabzLv3J1X0P0hNF+jfYzs2R2Zd+Dp9jljXVyHU3 rYldGPtYdYWUXlWtCCcK3PXObRPbMdctWNg41yy4Eon5UCNpmxjM8/18ZHkXwmtldqSWA4Jau pE9xOVhaeXYcpR6jArKFowol5Byiy8qw0Ci64zIro+tnKxEtlKzePhAavPJ+pbSM+YjSzQux7 4LMPabHId6Z1NIvs05+AHPDZgiRRCjrHyXLu0lrx1sOp87XKIP6qZxug2qNXiLWMjes+UKvQl tWmudOEejAfM9Bc6Knj5wH3Qa0A0= =E2=80=A6 > For full correctness, we should avoid removal from the list until after > we're done unthrottling in __cfsb_csd_unthrottle(). =E2=80=A6 See also: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/tree/Do= cumentation/process/submitting-patches.rst?h=3Dv6.14-rc3#n94 =E2=80=A6 > Reviewed-and-tested-by: K Prateek Nayak =E2=80=A6 Is such a tag really supported? See also: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/tree/Do= cumentation/process/submitting-patches.rst?h=3Dv6.14-rc3#n539 Regards, Markus