Commit 4d8457fe authored by Johan Hovold's avatar Johan Hovold Committed by Douglas Anderson
Browse files

drm/edid: fix info leak when failing to get panel id 



Make sure to clear the transfer buffer before fetching the EDID to
avoid leaking slab data to the logs on errors that leave the buffer
unchanged.

Fixes: 69c7717c ("drm/edid: Dump the EDID when drm_edid_get_panel_id() has an error")
Cc: stable@vger.kernel.org	# 6.2
Cc: Douglas Anderson <dianders@chromium.org>
Signed-off-by: default avatarJohan Hovold <johan+linaro@kernel.org>
Reviewed-by: default avatarJani Nikula <jani.nikula@intel.com>
Reviewed-by: default avatarDouglas Anderson <dianders@chromium.org>
Signed-off-by: default avatarDouglas Anderson <dianders@chromium.org>
Link: https://patchwork.freedesktop.org/patch/msgid/20230302074704.11371-1-johan+linaro@kernel.org
parent 77bc7624

drivers/gpu/drm/drm_edid.c

+1 −1
Original line number Diff line number Diff line
@@ -2797,7 +2797,7 @@ u32 drm_edid_get_panel_id(struct i2c_adapter *adapter) 
	 * the EDID then we'll just return 0.

	 */



	base_block = kmalloc(EDID_LENGTH, GFP_KERNEL);

	base_block = kzalloc(EDID_LENGTH, GFP_KERNEL);

	if (!base_block)

		return 0;