From patchwork Thu Oct 10 13:13:30 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Johan Hovold X-Patchwork-Id: 11183533 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id BA0871668 for ; Thu, 10 Oct 2019 13:14:39 +0000 (UTC) Received: from gabe.freedesktop.org (gabe.freedesktop.org [131.252.210.177]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id A2996206A1 for ; Thu, 10 Oct 2019 13:14:39 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org A2996206A1 Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=kernel.org Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=dri-devel-bounces@lists.freedesktop.org Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id 7522F6EB32; Thu, 10 Oct 2019 13:14:38 +0000 (UTC) X-Original-To: dri-devel@lists.freedesktop.org Delivered-To: dri-devel@lists.freedesktop.org Received: from mail-lj1-f196.google.com (mail-lj1-f196.google.com [209.85.208.196]) by gabe.freedesktop.org (Postfix) with ESMTPS id E22676EB2B; Thu, 10 Oct 2019 13:14:36 +0000 (UTC) Received: by mail-lj1-f196.google.com with SMTP id 7so6153368ljw.7; Thu, 10 Oct 2019 06:14:36 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references:mime-version:content-transfer-encoding; bh=7uV6DWb+5d+72lobYH9RlUHuo93UKxieqoJDmd2AkLE=; b=HWnpNNcSnogfiX0bECF/ibjJ4yQ+n11S8Y7WvLbsdqccZ1oOYH58wwsdHigxfbacJi BfNFgmSOEEe5YxuvDWaY0MuKqkbWU+j9HGAncNfZvixW1GvE6WYtwoPd22mWdlNQO/wH HtIFJ+PSmLrLZFezwb/F86nDqHH7MoAbXBXO4Ut24ZEt1u6NizGTTCtrINIjbXPnHq3U Hksl3As3UIK6juBrXWQhJyPUtOiuhnc9xflpKnaxLmHVuH1OMZutJU+2DoZmsS2oiu8W v7KL61SFCE3ZwHxpDhgJFOy8XXEzULJ6vcJuEHX3aKkt3+s/ooKFF7f+HHNrmc1Qub/1 Xd+g== X-Gm-Message-State: APjAAAUouiiHrNtORtCN/0rgZiRkCeACl83GXiT/tLrmAHDbFnwV1CpO Nkb/65t3XfQGPTa8IGl2r0Y= X-Google-Smtp-Source: APXvYqzFKhC+O0enYQEtd6+xCyXriydLhbwo0jiMAK6X/4MJHrEhzIRCF056ErjC0uEfoKkbTLxJHw== X-Received: by 2002:a2e:8ec2:: with SMTP id e2mr5820909ljl.126.1570713275165; Thu, 10 Oct 2019 06:14:35 -0700 (PDT) Received: from xi.terra (c-51f1e055.07-184-6d6c6d4.bbcust.telenor.se. [85.224.241.81]) by smtp.gmail.com with ESMTPSA id k7sm1184634lja.19.2019.10.10.06.14.34 (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Thu, 10 Oct 2019 06:14:34 -0700 (PDT) Received: from johan by xi.terra with local (Exim 4.92.2) (envelope-from ) id 1iIYHF-0006Ak-Dh; Thu, 10 Oct 2019 15:14:45 +0200 From: Johan Hovold To: Rob Clark , Sean Paul , Fabien Dessenne , Mauro Carvalho Chehab , Harald Freudenberger Subject: [PATCH 1/4] drm/msm: fix memleak on release Date: Thu, 10 Oct 2019 15:13:30 +0200 Message-Id: <20191010131333.23635-2-johan@kernel.org> X-Mailer: git-send-email 2.23.0 In-Reply-To: <20191010131333.23635-1-johan@kernel.org> References: <20191010131333.23635-1-johan@kernel.org> MIME-Version: 1.0 X-BeenThere: dri-devel@lists.freedesktop.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: Direct Rendering Infrastructure - Development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: linux-s390@vger.kernel.org, Vasily Gorbik , David Airlie , linux-arm-msm@vger.kernel.org, Heiko Carstens , linux-kernel@vger.kernel.org, dri-devel@lists.freedesktop.org, Johan Hovold , Christian Borntraeger , stable , Greg Kroah-Hartman , freedreno@lists.freedesktop.org, linux-media@vger.kernel.org Errors-To: dri-devel-bounces@lists.freedesktop.org Sender: "dri-devel" If a process is interrupted while accessing the "gpu" debugfs file and the drm device struct_mutex is contended, release() could return early and fail to free related resources. Note that the return value from release() is ignored. Fixes: 4f776f4511c7 ("drm/msm/gpu: Convert the GPU show function to use the GPU state") Cc: stable # 4.18 Cc: Jordan Crouse Cc: Rob Clark Signed-off-by: Johan Hovold Reviewed-by: Rob Clark --- drivers/gpu/drm/msm/msm_debugfs.c | 6 +----- 1 file changed, 1 insertion(+), 5 deletions(-) diff --git a/drivers/gpu/drm/msm/msm_debugfs.c b/drivers/gpu/drm/msm/msm_debugfs.c index 6be879578140..1c74381a4fc9 100644 --- a/drivers/gpu/drm/msm/msm_debugfs.c +++ b/drivers/gpu/drm/msm/msm_debugfs.c @@ -47,12 +47,8 @@ static int msm_gpu_release(struct inode *inode, struct file *file) struct msm_gpu_show_priv *show_priv = m->private; struct msm_drm_private *priv = show_priv->dev->dev_private; struct msm_gpu *gpu = priv->gpu; - int ret; - - ret = mutex_lock_interruptible(&show_priv->dev->struct_mutex); - if (ret) - return ret; + mutex_lock(&show_priv->dev->struct_mutex); gpu->funcs->gpu_state_put(show_priv->state); mutex_unlock(&show_priv->dev->struct_mutex);