drm/i915/dsi: defend gpio table against out of bounds access (4db3a244) · Commits · e / devices / android_kernel_fairphone_FP5

Do not blindly trust the VBT data used for indexing. Cc: stable@vger.kernel.org Reviewed-by:

drivers/gpu/drm/i915/intel_dsi_panel_vbt.c

+6 −0

Original line number	Diff line number	Diff line
		@@ -209,6 +209,11 @@ static const u8 mipi_exec_gpio(struct intel_dsi intel_dsi, const u8 *data)
		/* pull up/down */
		action = *data++;

		if (gpio >= ARRAY_SIZE(gtable)) {
		DRM_DEBUG_KMS("unknown gpio %u\n", gpio);
		goto out;
		}

		function = gtable[gpio].function_reg;
		pad = gtable[gpio].pad_reg;

		@@ -226,6 +231,7 @@ static const u8 mipi_exec_gpio(struct intel_dsi intel_dsi, const u8 *data)
		vlv_gpio_nc_write(dev_priv, pad, val);
		mutex_unlock(&dev_priv->sb_lock);

		out:
		return data;
		}