From: Johan Hovold johan+linaro@kernel.org
commit 4d8457fe0eb9c80ff7795cf8a30962128b71d853 upstream.
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: 69c7717c20cc ("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: Johan Hovold johan+linaro@kernel.org Reviewed-by: Jani Nikula jani.nikula@intel.com Reviewed-by: Douglas Anderson dianders@chromium.org Signed-off-by: Douglas Anderson dianders@chromium.org Link: https://patchwork.freedesktop.org/patch/msgid/20230302074704.11371-1-johan+l... Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- drivers/gpu/drm/drm_edid.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/gpu/drm/drm_edid.c b/drivers/gpu/drm/drm_edid.c index 3841aba17abd..8707fe72a028 100644 --- a/drivers/gpu/drm/drm_edid.c +++ b/drivers/gpu/drm/drm_edid.c @@ -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;