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r128: Add test for initialisation to all ioctls that require it (closes: #541630) 

svn path=/dists/trunk/linux-2.6/; revision=14177
This commit is contained in:
Ben Hutchings 2009-08-23 15:26:58 +00:00
parent 1ac47640d3
commit 16da5e8b5f
3 changed files with 230 additions and 0 deletions
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2
debian/changelog vendored
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@ -62,6 +62,8 @@ linux-2.6 (2.6.31~rc7-1~experimental.1) UNRELEASED; urgency=low
* Add warning on upgrade to a new upstream version where the system
appears to be missing necessary firmware files (closes: #541702)
* qla1280: Release spinlock when requesting firmware (closes: #543244)
* r128: Add test for initialisation to all ioctls that require it
(closes: #541630)
[ Martin Michlmayr ]
* [armel/orion5x, armel/kirkwood] Set GPIO_SYSFS=y since these

227
debian/patches/bugfix/all/drivers-gpu-drm-r128-ioctl-add-init-test.patch vendored Normal file
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@ -0,0 +1,227 @@
From aa735263241c7ae1ce9d3b6fd957b02819468f99 Mon Sep 17 00:00:00 2001
From: Ben Hutchings <ben@decadent.org.uk>
Date: Sat, 15 Aug 2009 19:22:39 +0100
Subject: [PATCH] r128: Add test for initialisation to all ioctls that require it
Almost all r128's private ioctls require that the CCE state has
already been initialised. However, most do not test that this has
been done, and will proceed to dereference a null pointer. This may
result in a security vulnerability, since some ioctls are
unprivileged.
This adds a macro for the common initialisation test and changes all
ioctl implementations that require prior initialisation to use that
macro.
Also, r128_do_init_cce() does not test that the CCE state has not
been initialised already. Repeated initialisation may lead to a crash
or resource leak. This adds that test.
---
drivers/gpu/drm/r128/r128_cce.c | 18 ++++++++++++++----
drivers/gpu/drm/r128/r128_drv.h | 8 ++++++++
drivers/gpu/drm/r128/r128_state.c | 36 +++++++++++++++++++-----------------
3 files changed, 41 insertions(+), 21 deletions(-)
diff --git a/drivers/gpu/drm/r128/r128_cce.c b/drivers/gpu/drm/r128/r128_cce.c
index c75fd35..ebf9f63 100644
--- a/drivers/gpu/drm/r128/r128_cce.c
+++ b/drivers/gpu/drm/r128/r128_cce.c
@@ -353,6 +353,11 @@ static int r128_do_init_cce(struct drm_device * dev, drm_r128_init_t * init)
DRM_DEBUG("\n");
+ if (dev->dev_private) {
+ DRM_DEBUG("called when already initialized\n");
+ return -EINVAL;
+ }
+
dev_priv = kzalloc(sizeof(drm_r128_private_t), GFP_KERNEL);
if (dev_priv == NULL)
return -ENOMEM;
@@ -649,6 +654,8 @@ int r128_cce_start(struct drm_device *dev, void *data, struct drm_file *file_pri
LOCK_TEST_WITH_RETURN(dev, file_priv);
+ DEV_INIT_TEST_WITH_RETURN(dev_priv);
+
if (dev_priv->cce_running || dev_priv->cce_mode == R128_PM4_NONPM4) {
DRM_DEBUG("while CCE running\n");
return 0;
@@ -671,6 +678,8 @@ int r128_cce_stop(struct drm_device *dev, void *data, struct drm_file *file_priv
LOCK_TEST_WITH_RETURN(dev, file_priv);
+ DEV_INIT_TEST_WITH_RETURN(dev_priv);
+
/* Flush any pending CCE commands. This ensures any outstanding
* commands are exectuted by the engine before we turn it off.
*/
@@ -708,10 +717,7 @@ int r128_cce_reset(struct drm_device *dev, void *data, struct drm_file *file_pri
LOCK_TEST_WITH_RETURN(dev, file_priv);
- if (!dev_priv) {
- DRM_DEBUG("called before init done\n");
- return -EINVAL;
- }
+ DEV_INIT_TEST_WITH_RETURN(dev_priv);
r128_do_cce_reset(dev_priv);
@@ -728,6 +734,8 @@ int r128_cce_idle(struct drm_device *dev, void *data, struct drm_file *file_priv
LOCK_TEST_WITH_RETURN(dev, file_priv);
+ DEV_INIT_TEST_WITH_RETURN(dev_priv);
+
if (dev_priv->cce_running) {
r128_do_cce_flush(dev_priv);
}
@@ -741,6 +749,8 @@ int r128_engine_reset(struct drm_device *dev, void *data, struct drm_file *file_
LOCK_TEST_WITH_RETURN(dev, file_priv);
+ DEV_INIT_TEST_WITH_RETURN(dev->dev_private);
+
return r128_do_engine_reset(dev);
}
diff --git a/drivers/gpu/drm/r128/r128_drv.h b/drivers/gpu/drm/r128/r128_drv.h
index 797a26c..3c60829 100644
--- a/drivers/gpu/drm/r128/r128_drv.h
+++ b/drivers/gpu/drm/r128/r128_drv.h
@@ -422,6 +422,14 @@ static __inline__ void r128_update_ring_snapshot(drm_r128_private_t * dev_priv)
* Misc helper macros
*/
+#define DEV_INIT_TEST_WITH_RETURN(_dev_priv) \
+do { \
+ if (!_dev_priv) { \
+ DRM_ERROR("called with no initialization\n"); \
+ return -EINVAL; \
+ } \
+} while (0)
+
#define RING_SPACE_TEST_WITH_RETURN( dev_priv ) \
do { \
drm_r128_ring_buffer_t *ring = &dev_priv->ring; int i; \
diff --git a/drivers/gpu/drm/r128/r128_state.c b/drivers/gpu/drm/r128/r128_state.c
index 026a48c..af2665c 100644
--- a/drivers/gpu/drm/r128/r128_state.c
+++ b/drivers/gpu/drm/r128/r128_state.c
@@ -1244,14 +1244,18 @@ static void r128_cce_dispatch_stipple(struct drm_device * dev, u32 * stipple)
static int r128_cce_clear(struct drm_device *dev, void *data, struct drm_file *file_priv)
{
drm_r128_private_t *dev_priv = dev->dev_private;
- drm_r128_sarea_t *sarea_priv = dev_priv->sarea_priv;
+ drm_r128_sarea_t *sarea_priv;
drm_r128_clear_t *clear = data;
DRM_DEBUG("\n");
LOCK_TEST_WITH_RETURN(dev, file_priv);
+ DEV_INIT_TEST_WITH_RETURN(dev_priv);
+
RING_SPACE_TEST_WITH_RETURN(dev_priv);
+ sarea_priv = dev_priv->sarea_priv;
+
if (sarea_priv->nbox > R128_NR_SAREA_CLIPRECTS)
sarea_priv->nbox = R128_NR_SAREA_CLIPRECTS;
@@ -1312,6 +1316,8 @@ static int r128_cce_flip(struct drm_device *dev, void *data, struct drm_file *fi
LOCK_TEST_WITH_RETURN(dev, file_priv);
+ DEV_INIT_TEST_WITH_RETURN(dev_priv);
+
RING_SPACE_TEST_WITH_RETURN(dev_priv);
if (!dev_priv->page_flipping)
@@ -1331,6 +1337,8 @@ static int r128_cce_swap(struct drm_device *dev, void *data, struct drm_file *fi
LOCK_TEST_WITH_RETURN(dev, file_priv);
+ DEV_INIT_TEST_WITH_RETURN(dev_priv);
+
RING_SPACE_TEST_WITH_RETURN(dev_priv);
if (sarea_priv->nbox > R128_NR_SAREA_CLIPRECTS)
@@ -1354,10 +1362,7 @@ static int r128_cce_vertex(struct drm_device *dev, void *data, struct drm_file *
LOCK_TEST_WITH_RETURN(dev, file_priv);
- if (!dev_priv) {
- DRM_ERROR("called with no initialization\n");
- return -EINVAL;
- }
+ DEV_INIT_TEST_WITH_RETURN(dev_priv);
DRM_DEBUG("pid=%d index=%d count=%d discard=%d\n",
DRM_CURRENTPID, vertex->idx, vertex->count, vertex->discard);
@@ -1410,10 +1415,7 @@ static int r128_cce_indices(struct drm_device *dev, void *data, struct drm_file
LOCK_TEST_WITH_RETURN(dev, file_priv);
- if (!dev_priv) {
- DRM_ERROR("called with no initialization\n");
- return -EINVAL;
- }
+ DEV_INIT_TEST_WITH_RETURN(dev_priv);
DRM_DEBUG("pid=%d buf=%d s=%d e=%d d=%d\n", DRM_CURRENTPID,
elts->idx, elts->start, elts->end, elts->discard);
@@ -1476,6 +1478,8 @@ static int r128_cce_blit(struct drm_device *dev, void *data, struct drm_file *fi
LOCK_TEST_WITH_RETURN(dev, file_priv);
+ DEV_INIT_TEST_WITH_RETURN(dev_priv);
+
DRM_DEBUG("pid=%d index=%d\n", DRM_CURRENTPID, blit->idx);
if (blit->idx < 0 || blit->idx >= dma->buf_count) {
@@ -1501,6 +1505,8 @@ static int r128_cce_depth(struct drm_device *dev, void *data, struct drm_file *f
LOCK_TEST_WITH_RETURN(dev, file_priv);
+ DEV_INIT_TEST_WITH_RETURN(dev_priv);
+
RING_SPACE_TEST_WITH_RETURN(dev_priv);
ret = -EINVAL;
@@ -1531,6 +1537,8 @@ static int r128_cce_stipple(struct drm_device *dev, void *data, struct drm_file
LOCK_TEST_WITH_RETURN(dev, file_priv);
+ DEV_INIT_TEST_WITH_RETURN(dev_priv);
+
if (DRM_COPY_FROM_USER(&mask, stipple->mask, 32 * sizeof(u32)))
return -EFAULT;
@@ -1555,10 +1563,7 @@ static int r128_cce_indirect(struct drm_device *dev, void *data, struct drm_file
LOCK_TEST_WITH_RETURN(dev, file_priv);
- if (!dev_priv) {
- DRM_ERROR("called with no initialization\n");
- return -EINVAL;
- }
+ DEV_INIT_TEST_WITH_RETURN(dev_priv);
DRM_DEBUG("idx=%d s=%d e=%d d=%d\n",
indirect->idx, indirect->start, indirect->end,
@@ -1620,10 +1625,7 @@ static int r128_getparam(struct drm_device *dev, void *data, struct drm_file *fi
drm_r128_getparam_t *param = data;
int value;
- if (!dev_priv) {
- DRM_ERROR("called with no initialization\n");
- return -EINVAL;
- }
+ DEV_INIT_TEST_WITH_RETURN(dev_priv);
DRM_DEBUG("pid=%d\n", DRM_CURRENTPID);
--
1.6.3.3

1
debian/patches/series/base vendored
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@ -35,3 +35,4 @@
+ features/arm/openrd.patch
+ features/arm/openrd-sata.patch
+ bugfix/all/drivers-scsi-qla1280-request-firmware-unlocked.patch
+ bugfix/all/drivers-gpu-drm-r128-ioctl-add-init-test.patch