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[209.132.180.67]) by mx.google.com with ESMTP id s6si15099123edi.154.2019.11.12.12.43.06; Tue, 12 Nov 2019 12:43:30 -0800 (PST) Received-SPF: pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) client-ip=209.132.180.67; Authentication-Results: mx.google.com; dkim=pass header.i=@poorly.run header.s=google header.b=W944HHeB; spf=pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727016AbfKLUmZ (ORCPT + 99 others); Tue, 12 Nov 2019 15:42:25 -0500 Received: from mail-yb1-f195.google.com ([209.85.219.195]:34590 "EHLO mail-yb1-f195.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726978AbfKLUmY (ORCPT ); Tue, 12 Nov 2019 15:42:24 -0500 Received: by mail-yb1-f195.google.com with SMTP id k17so38196ybp.1 for ; Tue, 12 Nov 2019 12:42:23 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=poorly.run; s=google; h=date:from:to:cc:subject:message-id:references:mime-version :content-disposition:in-reply-to:user-agent; bh=DjCiefqhC9NfqWC/1OWuy32sE5JWmV0rJU7JOPNgew0=; b=W944HHeBKCxkA8DrDh1k5jwoR6EZOWptr72GU329mg37lMtwT4iUEUZ8MibJm1WXxY mp7Vd5ttNkK4CKdk10wHGc7YF9Rmc7Qp+ybpA4tYo7/O523giEtR7c+XhEyDLATnYhVb IHC5y7twtbRJyIHHZRzoKP5vi4ejGXVr27T0mo7g73zutfQIeyf6oGcvFewyLk2NPWyf q8dSyuNzqh3edUolXoBkZG1uAJt7F9zXjjeQZ8cmV2aXlwTzMa1bBwazwh9AoGVjpztq ROJ96zgqiMdd32cZMSWhMI6OeGD1IF1ynEhs9KMTYO6cZ/2BMyturVgRm8wJtwJzGjPa d2sA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:date:from:to:cc:subject:message-id:references :mime-version:content-disposition:in-reply-to:user-agent; bh=DjCiefqhC9NfqWC/1OWuy32sE5JWmV0rJU7JOPNgew0=; b=oLu/oEBlgOtOGrkM4RRma0GQ0JpeEBRvleWryKhsPNFhk8dFiqlkkJ3Gk7YtY0Tp2Y Nu/nq7Dy+29lxqCbj6W5uIpkoxm6ExQNUkuU4eXGOYhFYYQCmhCqiySv/ntesGUJLdIK tTO8lJG9Sq9Cnw/nhSfE29CNXL7CEvzn6PXKPOApxNszo/MUmgwxEyDkk9FpckaJRkUM eEjRMdUJlZBNpO5pgaxfO0tfTW+HkItUOTH4KG+Em66I4ccRfg1w90LnG7kFmrtQ2Y4I Z0vT9ye34RLImupCdo+DeWYouZT5cr68zSGo+DOIkBM2dmKCyDzbR5cV2iGZCciZ+JHG 449w== X-Gm-Message-State: APjAAAVr8l8uNhJlyVcxb6KRhW7fdFB8B17PjicIa2QdQiND7gs2F2F7 efu0vF5BcRai3Hg7N5S6Gv50Ww== X-Received: by 2002:a25:7583:: with SMTP id q125mr2877735ybc.28.1573591343192; Tue, 12 Nov 2019 12:42:23 -0800 (PST) Received: from localhost ([2620:0:1013:11:89c6:2139:5435:371d]) by smtp.gmail.com with ESMTPSA id 138sm9476213ywr.46.2019.11.12.12.42.22 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 12 Nov 2019 12:42:22 -0800 (PST) Date: Tue, 12 Nov 2019 15:42:22 -0500 From: Sean Paul To: Rob Clark Cc: Daniel Vetter , Johan Hovold , Sean Paul , David Airlie , Heiko Carstens , Vasily Gorbik , Christian Borntraeger , linux-arm-msm , dri-devel , freedreno , Linux Kernel Mailing List , linux-media@vger.kernel.org, linux-s390@vger.kernel.org, Greg Kroah-Hartman , stable , Jordan Crouse , Harald Freudenberger , Mauro Carvalho Chehab , Fabien Dessenne , Dave Airlie Subject: Re: [PATCH 1/4] drm/msm: fix memleak on release Message-ID: <20191112204222.GB25787@art_vandelay> References: <20191010131333.23635-1-johan@kernel.org> <20191010131333.23635-2-johan@kernel.org> <20191030100146.GC4691@localhost> <20191112104001.GP11035@localhost> <20191112140155.GJ23790@phenom.ffwll.local> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: User-Agent: Mutt/1.10.1 (2018-07-13) Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Tue, Nov 12, 2019 at 08:32:07AM -0800, Rob Clark wrote: > On Tue, Nov 12, 2019 at 6:01 AM Daniel Vetter wrote: > > > > On Tue, Nov 12, 2019 at 11:40:01AM +0100, Johan Hovold wrote: > > > On Wed, Oct 30, 2019 at 11:01:46AM +0100, Johan Hovold wrote: > > > > On Thu, Oct 10, 2019 at 03:13:30PM +0200, Johan Hovold wrote: > > > > > 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 > > > > > --- > > > > > > > > Rob, Sean, > > > > > > > > Sending a reminder about this one, which is not yet in linux-next. > > > > > > > > Perhaps Daniel can pick it up otherwise? > > > > > > Another two weeks, another reminder. This one is still not in -next. > > > > Well msm is maintained in a separate tree, so the usual group maintainer > > fallback for when patches are stuck doesn't apply. > > oh, sorry, this wasn't showing up in patchwork.. or rather it did but > the non-msm related series subject made me overlook it. > > I've already sent a PR, but this shouldn't conflict with anything and > I think it can go in via drm-misc/fixes > > Reviewed-by: Rob Clark Thanks for the patch, pushed to drm-misc-next-fixes Sean > > > Rob, Sean, time to reconsider drm-misc for msm? I think there's some more > > oddball patches that occasionally get stuck for msm ... > > > > Also +Dave. > > -Daniel > > > > > > > > Johan > > > > > > > > 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); > > > > -- > > Daniel Vetter > > Software Engineer, Intel Corporation > > http://blog.ffwll.ch -- Sean Paul, Software Engineer, Google / Chromium OS