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From: Lyude Paul <lyude-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>
To: nouveau-PD4FTy7X32lNgt0PjOBp9y5qC8QIuHrW@public.gmane.org
Cc: David Airlie <airlied-cv59FeDIM0c@public.gmane.org>,
	dri-devel-PD4FTy7X32lNgt0PjOBp9y5qC8QIuHrW@public.gmane.org,
	Ben Skeggs <bskeggs-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>,
	stable-u79uwXL29TY76Z2rM5mHXA@public.gmane.org,
	linux-kernel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org
Subject: [PATCH 1/2] drm/nouveau: Fix runtime PM leak in drm_open()
Date: Tue,  3 Jul 2018 18:05:59 -0400	[thread overview]
Message-ID: <20180703220602.16664-2-lyude@redhat.com> (raw)
In-Reply-To: <20180703220602.16664-1-lyude-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>

Noticed this as I was skimming through, if we fail to allocate memory
for cli we'll end up returning without dropping the runtime PM ref we
got. Additionally, we'll even return the wrong return code! (ret most
likely will == 0 here, we want -ENOMEM).

Signed-off-by: Lyude Paul <lyude@redhat.com>
Cc: stable@vger.kernel.org
---
 drivers/gpu/drm/nouveau/nouveau_drm.c | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/drivers/gpu/drm/nouveau/nouveau_drm.c b/drivers/gpu/drm/nouveau/nouveau_drm.c
index 0452b18d36b9..0f668e275ee1 100644
--- a/drivers/gpu/drm/nouveau/nouveau_drm.c
+++ b/drivers/gpu/drm/nouveau/nouveau_drm.c
@@ -919,8 +919,10 @@ nouveau_drm_open(struct drm_device *dev, struct drm_file *fpriv)
 	get_task_comm(tmpname, current);
 	snprintf(name, sizeof(name), "%s[%d]", tmpname, pid_nr(fpriv->pid));
 
-	if (!(cli = kzalloc(sizeof(*cli), GFP_KERNEL)))
-		return ret;
+	if (!(cli = kzalloc(sizeof(*cli), GFP_KERNEL))) {
+		ret = -ENOMEM;
+		goto done;
+	}
 
 	ret = nouveau_cli_init(drm, name, cli);
 	if (ret)
-- 
2.17.1

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Nouveau@lists.freedesktop.org
https://lists.freedesktop.org/mailman/listinfo/nouveau

WARNING: multiple messages have this Message-ID (diff)
From: Lyude Paul <lyude@redhat.com>
To: nouveau@lists.freedesktop.org
Cc: stable@vger.kernel.org, Ben Skeggs <bskeggs@redhat.com>,
	David Airlie <airlied@linux.ie>,
	dri-devel@lists.freedesktop.org, linux-kernel@vger.kernel.org
Subject: [PATCH 1/2] drm/nouveau: Fix runtime PM leak in drm_open()
Date: Tue,  3 Jul 2018 18:05:59 -0400	[thread overview]
Message-ID: <20180703220602.16664-2-lyude@redhat.com> (raw)
In-Reply-To: <20180703220602.16664-1-lyude@redhat.com>

Noticed this as I was skimming through, if we fail to allocate memory
for cli we'll end up returning without dropping the runtime PM ref we
got. Additionally, we'll even return the wrong return code! (ret most
likely will == 0 here, we want -ENOMEM).

Signed-off-by: Lyude Paul <lyude@redhat.com>
Cc: stable@vger.kernel.org
---
 drivers/gpu/drm/nouveau/nouveau_drm.c | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/drivers/gpu/drm/nouveau/nouveau_drm.c b/drivers/gpu/drm/nouveau/nouveau_drm.c
index 0452b18d36b9..0f668e275ee1 100644
--- a/drivers/gpu/drm/nouveau/nouveau_drm.c
+++ b/drivers/gpu/drm/nouveau/nouveau_drm.c
@@ -919,8 +919,10 @@ nouveau_drm_open(struct drm_device *dev, struct drm_file *fpriv)
 	get_task_comm(tmpname, current);
 	snprintf(name, sizeof(name), "%s[%d]", tmpname, pid_nr(fpriv->pid));
 
-	if (!(cli = kzalloc(sizeof(*cli), GFP_KERNEL)))
-		return ret;
+	if (!(cli = kzalloc(sizeof(*cli), GFP_KERNEL))) {
+		ret = -ENOMEM;
+		goto done;
+	}
 
 	ret = nouveau_cli_init(drm, name, cli);
 	if (ret)
-- 
2.17.1


  parent reply	other threads:[~2018-07-03 22:05 UTC|newest]

Thread overview: 7+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2018-07-03 22:05 [PATCH 0/2] drm/nouveau: Fix runtime PM leaks Lyude Paul
2018-07-03 22:05 ` Lyude Paul
     [not found] ` <20180703220602.16664-1-lyude-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>
2018-07-03 22:05   ` Lyude Paul [this message]
2018-07-03 22:05     ` [PATCH 1/2] drm/nouveau: Fix runtime PM leak in drm_open() Lyude Paul
2018-07-04  2:41     ` Lukas Wunner
2018-07-03 22:06   ` [PATCH 2/2] drm/nouveau: Fix runtime PM leak in nv50_disp_atomic_commit() Lyude Paul
2018-07-03 22:06     ` Lyude Paul

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