From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail.ozlabs.org (gandalf.ozlabs.org [150.107.74.76]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 97F9A1F30BB; Mon, 4 Aug 2025 10:19:03 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=150.107.74.76 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1754302745; cv=none; b=ObY9UJzashTxKTiWCIddCHPtyuOQ4sjIMwWYyDl2IbW1DTtVqIfG4CdNVoEY1mnWs7ODH216JBB3954OHDtjpauhuX5qAOiWp47nnIgaJQWhmftt1F5lhoH3MAVHQqQX/WiQEi6si1kJbqI+QUPVDEVhVDyvSEDNfiQJTr+arY0= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1754302745; c=relaxed/simple; bh=3lodwvN4e8b9X9PqF31Mnjr9gOcDb+qXvIdD+U1nUTA=; h=Message-ID:Date:MIME-Version:Subject:To:Cc:References:From: In-Reply-To:Content-Type; b=nbn+lUVNQhm2rr9/VzZ0/emIbn7UZPWcnTt9EzMC924Iw0brKBbNWZWSn7uKEpYDXjLgBtq46dpH2jURGC4DdPBJeJ+1Fkx1eUmHBORJnbBjAN0vUMvGk272RHQ8NM/ivh9cOLFH3ubInZileFtn5LKtT+6pwjHKHPf4s60RPaA= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=kaod.org; spf=pass smtp.mailfrom=ozlabs.org; arc=none smtp.client-ip=150.107.74.76 Authentication-Results: smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=kaod.org Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=ozlabs.org Received: from mail.ozlabs.org (mail.ozlabs.org [IPv6:2404:9400:2221:ea00::3]) by gandalf.ozlabs.org (Postfix) with ESMTP id 4bwXb91Qz1z4x5K; Mon, 4 Aug 2025 20:19:01 +1000 (AEST) Received: from authenticated.ozlabs.org (localhost [127.0.0.1]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (4096 bits) server-digest SHA256) (Client did not present a certificate) by mail.ozlabs.org (Postfix) with ESMTPSA id 4bwXb56nFkz4x3q; Mon, 4 Aug 2025 20:18:57 +1000 (AEST) Message-ID: <0d0b203f-b753-41ee-97c5-fa4739f4915c@kaod.org> Date: Mon, 4 Aug 2025 12:18:57 +0200 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 2/2] powerpc/powernv/pci: Fix underflow and leak issue To: Nam Cao , Madhavan Srinivasan , Michael Ellerman , Nicholas Piggin , Christophe Leroy , Gautam Menghani , linuxppc-dev@lists.ozlabs.org, linux-kernel@vger.kernel.org Cc: stable@vger.kernel.org References: <70f8debe8688e0b467367db769b71c20146a836d.1754300646.git.namcao@linutronix.de> From: =?UTF-8?Q?C=C3=A9dric_Le_Goater?= Content-Language: en-US, fr Autocrypt: addr=clg@kaod.org; keydata= xsFNBFu8o3UBEADP+oJVJaWm5vzZa/iLgpBAuzxSmNYhURZH+guITvSySk30YWfLYGBWQgeo 8NzNXBY3cH7JX3/a0jzmhDc0U61qFxVgrPqs1PQOjp7yRSFuDAnjtRqNvWkvlnRWLFq4+U5t yzYe4SFMjFb6Oc0xkQmaK2flmiJNnnxPttYwKBPd98WfXMmjwAv7QfwW+OL3VlTPADgzkcqj 53bfZ4VblAQrq6Ctbtu7JuUGAxSIL3XqeQlAwwLTfFGrmpY7MroE7n9Rl+hy/kuIrb/TO8n0 ZxYXvvhT7OmRKvbYuc5Jze6o7op/bJHlufY+AquYQ4dPxjPPVUT/DLiUYJ3oVBWFYNbzfOrV RxEwNuRbycttMiZWxgflsQoHF06q/2l4ttS3zsV4TDZudMq0TbCH/uJFPFsbHUN91qwwaN/+ gy1j7o6aWMz+Ib3O9dK2M/j/O/Ube95mdCqN4N/uSnDlca3YDEWrV9jO1mUS/ndOkjxa34ia 70FjwiSQAsyIwqbRO3CGmiOJqDa9qNvd2TJgAaS2WCw/TlBALjVQ7AyoPEoBPj31K74Wc4GS Rm+FSch32ei61yFu6ACdZ12i5Edt+To+hkElzjt6db/UgRUeKfzlMB7PodK7o8NBD8outJGS tsL2GRX24QvvBuusJdMiLGpNz3uqyqwzC5w0Fd34E6G94806fwARAQABzSBDw6lkcmljIExl IEdvYXRlciA8Y2xnQGthb2Qub3JnPsLBeAQTAQIAIgUCW7yjdQIbAwYLCQgHAwIGFQgCCQoL BBYCAwECHgECF4AACgkQUaNDx8/77KGRSxAAuMJJMhJdj7acTcFtwof7CDSfoVX0owE2FJdd M43hNeTwPWlV5oLCj1BOQo0MVilIpSd9Qu5wqRD8KnN2Bv/rllKPqK2+i8CXymi9hsuzF56m 76wiPwbsX54jhv/VYY9Al7NBknh6iLYJiC/pgacRCHtSj/wofemSCM48s61s1OleSPSSvJE/ jYRa0jMXP98N5IEn8rEbkPua/yrm9ynHqi4dKEBCq/F7WDQ+FfUaFQb4ey47A/aSHstzpgsl TSDTJDD+Ms8y9x2X5EPKXnI3GRLaCKXVNNtrvbUd9LsKymK3WSbADaX7i0gvMFq7j51P/8yj neaUSKSkktHauJAtBNXHMghWm/xJXIVAW8xX5aEiSK7DNp5AM478rDXn9NZFUdLTAScVf7LZ VzMFKR0jAVG786b/O5vbxklsww+YXJGvCUvHuysEsz5EEzThTJ6AC5JM2iBn9/63PKiS3ptJ QAqzasT6KkZ9fKLdK3qtc6yPaSm22C5ROM3GS+yLy6iWBkJ/nEYh/L/du+TLw7YNbKejBr/J ml+V3qZLfuhDjW0GbeJVPzsENuxiNiBbyzlSnAvKlzda/sBDvxmvWhC+nMRQCf47mFr8Xx3w WtDSQavnz3zTa0XuEucpwfBuVdk4RlPzNPri6p2KTBhPEvRBdC9wNOdRBtsP9rAPjd52d73O wU0EW7yjdQEQALyDNNMw/08/fsyWEWjfqVhWpOOrX2h+z4q0lOHkjxi/FRIRLfXeZjFfNQNL SoL8j1y2rQOs1j1g+NV3K5hrZYYcMs0xhmrZKXAHjjDx7FW3sG3jcGjFW5Xk4olTrZwFsZVU cP8XZlArLmkAX3UyrrXEWPSBJCXxDIW1hzwpbV/nVbo/K9XBptT/wPd+RPiOTIIRptjypGY+ S23HYBDND3mtfTz/uY0Jytaio9GETj+fFis6TxFjjbZNUxKpwftu/4RimZ7qL+uM1rG1lLWc 9SPtFxRQ8uLvLOUFB1AqHixBcx7LIXSKZEFUCSLB2AE4wXQkJbApye48qnZ09zc929df5gU6 hjgqV9Gk1rIfHxvTsYltA1jWalySEScmr0iSYBZjw8Nbd7SxeomAxzBv2l1Fk8fPzR7M616d tb3Z3HLjyvwAwxtfGD7VnvINPbzyibbe9c6gLxYCr23c2Ry0UfFXh6UKD83d5ybqnXrEJ5n/ t1+TLGCYGzF2erVYGkQrReJe8Mld3iGVldB7JhuAU1+d88NS3aBpNF6TbGXqlXGF6Yua6n1c OY2Yb4lO/mDKgjXd3aviqlwVlodC8AwI0SdujWryzL5/AGEU2sIDQCHuv1QgzmKwhE58d475 KdVX/3Vt5I9kTXpvEpfW18TjlFkdHGESM/JxIqVsqvhAJkalABEBAAHCwV8EGAECAAkFAlu8 o3UCGwwACgkQUaNDx8/77KEhwg//WqVopd5k8hQb9VVdk6RQOCTfo6wHhEqgjbXQGlaxKHoX ywEQBi8eULbeMQf5l4+tHJWBxswQ93IHBQjKyKyNr4FXseUI5O20XVNYDJZUrhA4yn0e/Af0 IX25d94HXQ5sMTWr1qlSK6Zu79lbH3R57w9jhQm9emQEp785ui3A5U2Lqp6nWYWXz0eUZ0Ta d2zC71Gg9VazU9MXyWn749s0nXbVLcLS0yops302Gf3ZmtgfXTX/W+M25hiVRRKCH88yr6it +OMJBUndQVAA/fE9hYom6t/zqA248j0QAV/pLHH3hSirE1mv+7jpQnhMvatrwUpeXrOiEw1n HzWCqOJUZ4SY+HmGFW0YirWV2mYKoaGO2YBUwYF7O9TI3GEEgRMBIRT98fHa0NPwtlTktVIS l73LpgVscdW8yg9Gc82oe8FzU1uHjU8b10lUXOMHpqDDEV9//r4ZhkKZ9C4O+YZcTFu+mvAY 3GlqivBNkmYsHYSlFsbxc37E1HpTEaSWsGfAHQoPn9qrDJgsgcbBVc1gkUT6hnxShKPp4Pls ZVMNjvPAnr5TEBgHkk54HQRhhwcYv1T2QumQizDiU6iOrUzBThaMhZO3i927SG2DwWDVzZlt KrCMD1aMPvb3NU8FOYRhNmIFR3fcalYr+9gDuVKe8BVz4atMOoktmt0GWTOC8P4= In-Reply-To: <70f8debe8688e0b467367db769b71c20146a836d.1754300646.git.namcao@linutronix.de> Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 8bit On 8/4/25 12:07, Nam Cao wrote: > pnv_irq_domain_alloc() allocates interrupts at parent's interrupt > domain. If it fails in the progress, all allocated interrupts are > freed. > > The number of successfully allocated interrupts so far is stored > "i". However, "i - 1" interrupts are freed. This is broken: > > - One interrupt is not be freed > > - If "i" is zero, "i - 1" wraps around > > Correct the number of freed interrupts to "i". > > Fixes: 0fcfe2247e75 ("powerpc/powernv/pci: Add MSI domains") > Signed-off-by: Nam Cao > Cc: stable@vger.kernel.org > --- > arch/powerpc/platforms/powernv/pci-ioda.c | 2 +- > 1 file changed, 1 insertion(+), 1 deletion(-) Reviewed-by: Cédric Le Goater Thanks, C.