We use kzalloc to allocate the write_buf that we use for i2c transfer on hdcp write. But it seems that we are forgetting to free the memory that is not needed after i2c transfer is completed.

Reported-by: Brian J Wood brian.j.wood@intel.com Fixes: 2320175feb74 ("drm/i915: Implement HDCP for HDMI") Cc: Ramalingam C ramalingam.c@intel.com Cc: Sean Paul seanpaul@chromium.org Cc: Jani Nikula jani.nikula@linux.intel.com Cc: Rodrigo Vivi rodrigo.vivi@intel.com Cc: stable@vger.kernel.org # v4.17+ Signed-off-by: Rodrigo Vivi rodrigo.vivi@intel.com --- drivers/gpu/drm/i915/intel_hdmi.c | 8 ++++++-- 1 file changed, 6 insertions(+), 2 deletions(-)

diff --git a/drivers/gpu/drm/i915/intel_hdmi.c b/drivers/gpu/drm/i915/intel_hdmi.c index 8363fbd18ee8..a1799b5c12bb 100644 --- a/drivers/gpu/drm/i915/intel_hdmi.c +++ b/drivers/gpu/drm/i915/intel_hdmi.c @@ -943,8 +943,12 @@ static int intel_hdmi_hdcp_write(struct intel_digital_port *intel_dig_port,

ret = i2c_transfer(adapter, &msg, 1); if (ret == 1) - return 0; - return ret >= 0 ? -EIO : ret; + ret = 0; + else if (ret >= 0) + ret = -EIO; + + kfree(write_buf); + return ret; }

static