On Fri, 20 Jan 2017, Ander Conselvan de Oliveira <ander.conselvan.de.oliveira@xxxxxxxxx> wrote:
> In the path where intel_crt_detect_ddc() detects a CRT, if would return
> true without freeing the edid.
>
> Found by coverity.
>
> Fixes: a2bd1f541f19 ("drm/i915: check whether we actually received an
> edid in detect_ddc")
> Cc: Chris Wilson <chris@xxxxxxxxxxxxxxxxxx>
> Cc: Daniel Vetter <daniel.vetter@xxxxxxxx>
> Cc: Daniel Vetter <daniel.vetter@xxxxxxxxx>
> Cc: Jani Nikula <jani.nikula@xxxxxxxxxxxxxxx>
> Cc: intel-gfx@xxxxxxxxxxxxxxxxxxxxx
> Cc: <stable@xxxxxxxxxxxxxxx> # v3.6+
> Signed-off-by: Ander Conselvan de Oliveira <ander.conselvan.de.oliveira@xxxxxxxxx>
Reviewed-by: Jani Nikula <jani.nikula@xxxxxxxxx>
> ---
> drivers/gpu/drm/i915/intel_crt.c | 9 +++++----
> 1 file changed, 5 insertions(+), 4 deletions(-)
>
> diff --git a/drivers/gpu/drm/i915/intel_crt.c b/drivers/gpu/drm/i915/intel_crt.c
> index 385e29a..2bf5aca 100644
> --- a/drivers/gpu/drm/i915/intel_crt.c
> +++ b/drivers/gpu/drm/i915/intel_crt.c
> @@ -499,6 +499,7 @@ static bool intel_crt_detect_ddc(struct drm_connector *connector)
> struct drm_i915_private *dev_priv = to_i915(crt->base.base.dev);
> struct edid *edid;
> struct i2c_adapter *i2c;
> + bool ret = false;
>
> BUG_ON(crt->base.type != INTEL_OUTPUT_ANALOG);
>
> @@ -515,17 +516,17 @@ static bool intel_crt_detect_ddc(struct drm_connector *connector)
> */
> if (!is_digital) {
> DRM_DEBUG_KMS("CRT detected via DDC:0x50 [EDID]\n");
> - return true;
> + ret = true;
> + } else {
> + DRM_DEBUG_KMS("CRT not detected via DDC:0x50 [EDID reports a digital panel]\n");
> }
> -
> - DRM_DEBUG_KMS("CRT not detected via DDC:0x50 [EDID reports a digital panel]\n");
> } else {
> DRM_DEBUG_KMS("CRT not detected via DDC:0x50 [no valid EDID found]\n");
> }
>
> kfree(edid);
>
> - return false;
> + return ret;
> }
>
> static enum drm_connector_status
--
Jani Nikula, Intel Open Source Technology Center
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