On Mon, Jul 20, 2015 at 08:36:01PM +0530, Sudip Mukherjee wrote:
> While creating the debugfs file we are setting the inode->i_private to
> dev. That same dev is passed to these functions as private of struct
> seq_file via single_open(). So at this point it can never be NULL.
>
> Signed-off-by: Sudip Mukherjee <sudip@xxxxxxxxxxxxxxx>
> ---
>
> v1 was drm/i915: fix possible null pointer dereference
There's still one left in i915_displayport_test_active_write. Also please
mention the commit that introduced these and Cc: the author. Also please
Cc: Chris since he's commented on v1 of this patch.
Thanks, Daniel
>
> drivers/gpu/drm/i915/i915_debugfs.c | 9 ---------
> 1 file changed, 9 deletions(-)
>
> diff --git a/drivers/gpu/drm/i915/i915_debugfs.c b/drivers/gpu/drm/i915/i915_debugfs.c
> index bc817da..63cb886 100644
> --- a/drivers/gpu/drm/i915/i915_debugfs.c
> +++ b/drivers/gpu/drm/i915/i915_debugfs.c
> @@ -4103,9 +4103,6 @@ static int i915_displayport_test_active_show(struct seq_file *m, void *data)
> struct list_head *connector_list = &dev->mode_config.connector_list;
> struct intel_dp *intel_dp;
>
> - if (!dev)
> - return -ENODEV;
> -
> list_for_each_entry(connector, connector_list, head) {
>
> if (connector->connector_type !=
> @@ -4150,9 +4147,6 @@ static int i915_displayport_test_data_show(struct seq_file *m, void *data)
> struct list_head *connector_list = &dev->mode_config.connector_list;
> struct intel_dp *intel_dp;
>
> - if (!dev)
> - return -ENODEV;
> -
> list_for_each_entry(connector, connector_list, head) {
>
> if (connector->connector_type !=
> @@ -4192,9 +4186,6 @@ static int i915_displayport_test_type_show(struct seq_file *m, void *data)
> struct list_head *connector_list = &dev->mode_config.connector_list;
> struct intel_dp *intel_dp;
>
> - if (!dev)
> - return -ENODEV;
> -
> list_for_each_entry(connector, connector_list, head) {
>
> if (connector->connector_type !=
> --
> 1.8.1.2
>
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--
Daniel Vetter
Software Engineer, Intel Corporation
http://blog.ffwll.ch
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