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From: Hangyu Hua <hbh25y@gmail.com>
To: maarten.lankhorst@linux.intel.com, mripard@kernel.org,
	tzimmermann@suse.de, airlied@linux.ie, daniel@ffwll.ch
Cc: linux-kernel@vger.kernel.org, dri-devel@lists.freedesktop.org,
	Hangyu Hua <hbh25y@gmail.com>
Subject: [PATCH] gpu: drm: fix possible memory leak in drm_addmap_core()
Date: Mon,  9 May 2022 13:44:41 +0800	[thread overview]
Message-ID: <20220509054441.17282-1-hbh25y@gmail.com> (raw)

map->handle need to be handled correctly when map->type is _DRM_SHM or
_DRM_CONSISTENT just like map->type is _DRM_REGISTERS.

Fixes: 8d153f7107ff ("drm: update user token hashing and map handles")
Signed-off-by: Hangyu Hua <hbh25y@gmail.com>
---
 drivers/gpu/drm/drm_bufs.c | 18 ++++++++++++++++++
 1 file changed, 18 insertions(+)

diff --git a/drivers/gpu/drm/drm_bufs.c b/drivers/gpu/drm/drm_bufs.c
index fcca21e8efac..2b3f504c5f9c 100644
--- a/drivers/gpu/drm/drm_bufs.c
+++ b/drivers/gpu/drm/drm_bufs.c
@@ -344,6 +344,15 @@ static int drm_addmap_core(struct drm_device *dev, resource_size_t offset,
 	if (!list) {
 		if (map->type == _DRM_REGISTERS)
 			iounmap(map->handle);
+		else if (map->type == _DRM_SHM) {
+			dev->sigdata.lock = dev->master->lock.hw_lock = NULL;
+			vfree(map->handle);
+		} else if (map->type == _DRM_CONSISTENT) {
+			dma_free_coherent(dev->dev,
+					  map->size,
+					  map->handle,
+					  map->offset);
+		}
 		kfree(map);
 		return -EINVAL;
 	}
@@ -361,6 +370,15 @@ static int drm_addmap_core(struct drm_device *dev, resource_size_t offset,
 	if (ret) {
 		if (map->type == _DRM_REGISTERS)
 			iounmap(map->handle);
+		else if (map->type == _DRM_SHM) {
+			dev->sigdata.lock = dev->master->lock.hw_lock = NULL;
+			vfree(map->handle);
+		} else if (map->type == _DRM_CONSISTENT) {
+			dma_free_coherent(dev->dev,
+					  map->size,
+					  map->handle,
+					  map->offset);
+		}
 		kfree(map);
 		kfree(list);
 		mutex_unlock(&dev->struct_mutex);
-- 
2.25.1


WARNING: multiple messages have this Message-ID (diff)
From: Hangyu Hua <hbh25y@gmail.com>
To: maarten.lankhorst@linux.intel.com, mripard@kernel.org,
	tzimmermann@suse.de, airlied@linux.ie, daniel@ffwll.ch
Cc: dri-devel@lists.freedesktop.org, linux-kernel@vger.kernel.org,
	Hangyu Hua <hbh25y@gmail.com>
Subject: [PATCH] gpu: drm: fix possible memory leak in drm_addmap_core()
Date: Mon,  9 May 2022 13:44:41 +0800	[thread overview]
Message-ID: <20220509054441.17282-1-hbh25y@gmail.com> (raw)

map->handle need to be handled correctly when map->type is _DRM_SHM or
_DRM_CONSISTENT just like map->type is _DRM_REGISTERS.

Fixes: 8d153f7107ff ("drm: update user token hashing and map handles")
Signed-off-by: Hangyu Hua <hbh25y@gmail.com>
---
 drivers/gpu/drm/drm_bufs.c | 18 ++++++++++++++++++
 1 file changed, 18 insertions(+)

diff --git a/drivers/gpu/drm/drm_bufs.c b/drivers/gpu/drm/drm_bufs.c
index fcca21e8efac..2b3f504c5f9c 100644
--- a/drivers/gpu/drm/drm_bufs.c
+++ b/drivers/gpu/drm/drm_bufs.c
@@ -344,6 +344,15 @@ static int drm_addmap_core(struct drm_device *dev, resource_size_t offset,
 	if (!list) {
 		if (map->type == _DRM_REGISTERS)
 			iounmap(map->handle);
+		else if (map->type == _DRM_SHM) {
+			dev->sigdata.lock = dev->master->lock.hw_lock = NULL;
+			vfree(map->handle);
+		} else if (map->type == _DRM_CONSISTENT) {
+			dma_free_coherent(dev->dev,
+					  map->size,
+					  map->handle,
+					  map->offset);
+		}
 		kfree(map);
 		return -EINVAL;
 	}
@@ -361,6 +370,15 @@ static int drm_addmap_core(struct drm_device *dev, resource_size_t offset,
 	if (ret) {
 		if (map->type == _DRM_REGISTERS)
 			iounmap(map->handle);
+		else if (map->type == _DRM_SHM) {
+			dev->sigdata.lock = dev->master->lock.hw_lock = NULL;
+			vfree(map->handle);
+		} else if (map->type == _DRM_CONSISTENT) {
+			dma_free_coherent(dev->dev,
+					  map->size,
+					  map->handle,
+					  map->offset);
+		}
 		kfree(map);
 		kfree(list);
 		mutex_unlock(&dev->struct_mutex);
-- 
2.25.1


             reply	other threads:[~2022-05-09  5:45 UTC|newest]

Thread overview: 6+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2022-05-09  5:44 Hangyu Hua [this message]
2022-05-09  5:44 ` [PATCH] gpu: drm: fix possible memory leak in drm_addmap_core() Hangyu Hua
2022-05-23  1:57 ` Hangyu Hua
2022-05-23  1:57   ` Hangyu Hua
2022-06-23  1:45   ` Hangyu Hua
2022-06-23  1:45     ` Hangyu Hua

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