| Message ID | 1406127433-3914-2-git-send-email-tjakobi@math.uni-bielefeld.de (mailing list archive) |
|---|---|
| State | Not Applicable, archived |
| Headers | show |
2014-07-23 23:57 GMT+09:00 Tobias Jakobi <tjakobi@math.uni-bielefeld.de>: > Both exynos_g2d_set_cmdlist_ioctl and exynos_g2d_exec_ioctl don't check > if the G2D was succesfully probe. If that is not the case, then g2d_priv > is just NULL and extracting 'dev' from it in the next step is going to > produce a kernel oops. > > Add proper checks and return ENODEV if the G2D is not available. > > Signed-off-by: Tobias Jakobi <tjakobi@math.uni-bielefeld.de> > --- > drivers/gpu/drm/exynos/exynos_drm_g2d.c | 12 ++++++++++-- > 1 file changed, 10 insertions(+), 2 deletions(-) > > diff --git a/drivers/gpu/drm/exynos/exynos_drm_g2d.c b/drivers/gpu/drm/exynos/exynos_drm_g2d.c > index 5fa1bb6..8c62423 100644 > --- a/drivers/gpu/drm/exynos/exynos_drm_g2d.c > +++ b/drivers/gpu/drm/exynos/exynos_drm_g2d.c > @@ -1056,7 +1056,7 @@ int exynos_g2d_set_cmdlist_ioctl(struct drm_device *drm_dev, void *data, > { > struct drm_exynos_file_private *file_priv = file->driver_priv; > struct exynos_drm_g2d_private *g2d_priv = file_priv->g2d_priv; > - struct device *dev = g2d_priv->dev; > + struct device *dev; > struct g2d_data *g2d; > struct drm_exynos_g2d_set_cmdlist *req = data; > struct drm_exynos_g2d_cmd *cmd; > @@ -1067,6 +1067,10 @@ int exynos_g2d_set_cmdlist_ioctl(struct drm_device *drm_dev, void *data, > int size; > int ret; > > + if (!g2d_priv) > + return -ENODEV; > + > + dev = g2d_priv->dev; > if (!dev) > return -ENODEV; > > @@ -1223,13 +1227,17 @@ int exynos_g2d_exec_ioctl(struct drm_device *drm_dev, void *data, > { > struct drm_exynos_file_private *file_priv = file->driver_priv; > struct exynos_drm_g2d_private *g2d_priv = file_priv->g2d_priv; > - struct device *dev = g2d_priv->dev; > + struct device *dev; > struct g2d_data *g2d; > struct drm_exynos_g2d_exec *req = data; > struct g2d_runqueue_node *runqueue_node; > struct list_head *run_cmdlist; > struct list_head *event_list; > > + if (!g2d_priv) > + return -ENODEV; > + > + dev = g2d_priv->dev It seems that you have no build test because above line incurs build error. Anyway I fixed it up. Thanks, Inki Dae > if (!dev) > return -ENODEV; > > -- > 1.8.5.5 > > -- > To unsubscribe from this list: send the line "unsubscribe linux-samsung-soc" in > the body of a message to majordomo@vger.kernel.org > More majordomo info at http://vger.kernel.org/majordomo-info.html -- To unsubscribe from this list: send the line "unsubscribe linux-samsung-soc" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
Inki Dae wrote: > It seems that you have no build test because above line incurs build > error. Anyway I fixed it up. That's why I have sent v2 of the patch. With best wishes, Tobias -- To unsubscribe from this list: send the line "unsubscribe linux-samsung-soc" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
On 2014? 08? 03? 18:52, Tobias Jakobi wrote: > Inki Dae wrote: >> It seems that you have no build test because above line incurs build >> error. Anyway I fixed it up. > That's why I have sent v2 of the patch. > Oops, sorry. I didn't check v2. Thanks, Inki Dae > With best wishes, > Tobias > > -- To unsubscribe from this list: send the line "unsubscribe linux-samsung-soc" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
On 2014-08-04 02:28, Inki Dae wrote:
> Oops, sorry. I didn't check v2.
No problem :)
It would be good if you could also check the libdrm patches that I've
resent some while ago.
With best wishes,
Tobias
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diff --git a/drivers/gpu/drm/exynos/exynos_drm_g2d.c b/drivers/gpu/drm/exynos/exynos_drm_g2d.c index 5fa1bb6..8c62423 100644 --- a/drivers/gpu/drm/exynos/exynos_drm_g2d.c +++ b/drivers/gpu/drm/exynos/exynos_drm_g2d.c @@ -1056,7 +1056,7 @@ int exynos_g2d_set_cmdlist_ioctl(struct drm_device *drm_dev, void *data, { struct drm_exynos_file_private *file_priv = file->driver_priv; struct exynos_drm_g2d_private *g2d_priv = file_priv->g2d_priv; - struct device *dev = g2d_priv->dev; + struct device *dev; struct g2d_data *g2d; struct drm_exynos_g2d_set_cmdlist *req = data; struct drm_exynos_g2d_cmd *cmd; @@ -1067,6 +1067,10 @@ int exynos_g2d_set_cmdlist_ioctl(struct drm_device *drm_dev, void *data, int size; int ret; + if (!g2d_priv) + return -ENODEV; + + dev = g2d_priv->dev; if (!dev) return -ENODEV; @@ -1223,13 +1227,17 @@ int exynos_g2d_exec_ioctl(struct drm_device *drm_dev, void *data, { struct drm_exynos_file_private *file_priv = file->driver_priv; struct exynos_drm_g2d_private *g2d_priv = file_priv->g2d_priv; - struct device *dev = g2d_priv->dev; + struct device *dev; struct g2d_data *g2d; struct drm_exynos_g2d_exec *req = data; struct g2d_runqueue_node *runqueue_node; struct list_head *run_cmdlist; struct list_head *event_list; + if (!g2d_priv) + return -ENODEV; + + dev = g2d_priv->dev if (!dev) return -ENODEV;
Both exynos_g2d_set_cmdlist_ioctl and exynos_g2d_exec_ioctl don't check if the G2D was succesfully probe. If that is not the case, then g2d_priv is just NULL and extracting 'dev' from it in the next step is going to produce a kernel oops. Add proper checks and return ENODEV if the G2D is not available. Signed-off-by: Tobias Jakobi <tjakobi@math.uni-bielefeld.de> --- drivers/gpu/drm/exynos/exynos_drm_g2d.c | 12 ++++++++++-- 1 file changed, 10 insertions(+), 2 deletions(-)