From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-ej1-f45.google.com (mail-ej1-f45.google.com [209.85.218.45]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id F307E5C92 for ; Fri, 9 Sep 2022 17:59:28 +0000 (UTC) Received: by mail-ej1-f45.google.com with SMTP id r17so5749648ejy.9 for ; Fri, 09 Sep 2022 10:59:28 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20210112; h=content-transfer-encoding:in-reply-to:from:references:cc:to :content-language:subject:user-agent:mime-version:date:message-id :from:to:cc:subject:date; bh=273KJVUIjaB1QIyJW3Sl3DHo+oLOYiNHF5nS/ot7tzw=; b=IsHxMtoGtIkUZBDTZGlWMRk+bjBCQwoj/WlJulDFg4ieGLjJ2pluQwpWhPIPzk1f7I dOJuGoOPDtXRI8VGZcyqmFOm/RfhdafwFA4r4OhV2Q/jiSpZBp0zsORsEaLFrmFfM1Ey eIKsVaKtwMoA0oovMecx06tskY88SG0Q/9B0VTqoVxvyityn1IrSk2lBSRr2NiEm5Se9 HvioWL4zEm/uGDHgz7CofFAFUmdXR7yJRSmmwZxl1m0Jer/prNw9K+8QoNpIcvF1qXBz qocw1QpIEmYYSNSfV3SWdMhs21VulT5nRrE1NDZQcLUCzJOvg2m/VZjra/4j+LCd64T0 eorg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=content-transfer-encoding:in-reply-to:from:references:cc:to :content-language:subject:user-agent:mime-version:date:message-id :x-gm-message-state:from:to:cc:subject:date; bh=273KJVUIjaB1QIyJW3Sl3DHo+oLOYiNHF5nS/ot7tzw=; b=dlEkThAGmm+tuKu24GJlup7RUuHfS98c6emk4hZQZ/xt6c6HHz1eOXRUIFSr2Rd6XU tzxEj9/9hrGj2EzutCGEMzpm+4ElVeJeE3k4JFAhT2d2oZr9N2E9VLd8n48LYRRMC2pu SfMC7NewnM9DUvS97fxcc37cujmbuav/YKWLNCphX12Tis6dfZNKqQ/y9omlVfbKz53D jRhfrHVpB+MKfq33vkW8H5YSHY8HsZjAbJA32NbJeo/W2HqD2apcAVPA+jJJL1Stz4lJ DgUQVmr/Qpxmsb/c2rV4x4g5uHJLznlPzQX387SQKlBvvtE63ij7BGkacp+GQ/khvRN6 lM3g== X-Gm-Message-State: ACgBeo0f+PUGVb2rrxLLOR2I+NhgmDUdvaNWuZpnbBNA/GDQ8G0/KIgu nuYXWuJ+IKzoF+p9NMVFh+k= X-Google-Smtp-Source: AA6agR6edoO22IOba2dzePXDN6j6lE8PL1IxCHaW7Kp94y9dgXXrXp7bMc0Jmrci623jer6pjgyE/Q== X-Received: by 2002:a17:907:1c12:b0:742:7a6:a1b6 with SMTP id nc18-20020a1709071c1200b0074207a6a1b6mr10461344ejc.159.1662746367364; Fri, 09 Sep 2022 10:59:27 -0700 (PDT) Received: from [192.168.1.103] (p57ba2cf5.dip0.t-ipconnect.de. [87.186.44.245]) by smtp.gmail.com with ESMTPSA id b10-20020a056402138a00b0044625884285sm719600edv.49.2022.09.09.10.59.26 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Fri, 09 Sep 2022 10:59:26 -0700 (PDT) Message-ID: <499af3df-5fed-91b5-9006-0ce3bac41c1d@gmail.com> Date: Fri, 9 Sep 2022 19:59:25 +0200 Precedence: bulk X-Mailing-List: linux-staging@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:91.0) Gecko/20100101 Thunderbird/91.11.0 Subject: Re: [PATCH] staging: vt6655: fix potential memory leak Content-Language: en-US To: Nam Cao , forest@alittletooquiet.net, gregkh@linuxfoundation.org Cc: linux-kernel@vger.kernel.org, linux-staging@lists.linux.dev References: <20220909141338.19343-1-namcaov@gmail.com> From: Philipp Hortmann In-Reply-To: <20220909141338.19343-1-namcaov@gmail.com> Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit On 9/9/22 16:13, Nam Cao wrote: > In function device_init_td0_ring, memory is allocated for member > td_info of priv->apTD0Rings[i], with i increasing from 0. In case of > allocation failure, the memory is freed in reversed order, with i > decreasing to 0. However, the case i=0 is left out and thus memory is > leaked. > > Modify the memory freeing loop to include the case i=0. > > Signed-off-by: Nam Cao > --- > drivers/staging/vt6655/device_main.c | 2 +- > 1 file changed, 1 insertion(+), 1 deletion(-) > > diff --git a/drivers/staging/vt6655/device_main.c b/drivers/staging/vt6655/device_main.c > index 3397c78b975a..a65014195fdc 100644 > --- a/drivers/staging/vt6655/device_main.c > +++ b/drivers/staging/vt6655/device_main.c > @@ -743,7 +743,7 @@ static int device_init_td0_ring(struct vnt_private *priv) > return 0; > > err_free_desc: > - while (--i) { > + while (i--) { > desc = &priv->apTD0Rings[i]; > kfree(desc->td_info); > } Tested-by: Philipp Hortmann