From 5eccd05b610a861d30ba2fa0659b6987582ffba3 Mon Sep 17 00:00:00 2001
From: Matthieu Herrb <matthieu@herrb.eu>
Date: Mon, 9 Jun 2025 18:27:40 +0200
Subject: [PATCH] Fix drmModeCreatePropertyBlob() length parameter after
 f894801fa20c

Fixes: f894801fa ("xfree86: modesetting: don't use VLA")
Part-of: <https://gitlab.freedesktop.org/xorg/xserver/-/merge_requests/2011>
(cherry picked from commit 772cb304482c9ec5b1c4e3e849d33d62aa099f0c)
---
 hw/xfree86/drivers/modesetting/drmmode_display.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/hw/xfree86/drivers/modesetting/drmmode_display.c b/hw/xfree86/drivers/modesetting/drmmode_display.c
index 52de242e2..e7652c2dd 100644
--- a/hw/xfree86/drivers/modesetting/drmmode_display.c
+++ b/hw/xfree86/drivers/modesetting/drmmode_display.c
@@ -1927,7 +1927,9 @@ drmmode_set_gamma_lut(drmmode_crtc_private_ptr drmmode_crtc,
     }
 
     uint32_t blob_id;
-    if (drmModeCreatePropertyBlob(drmmode->fd, lut, sizeof(lut), &blob_id)) {
+    if (drmModeCreatePropertyBlob(drmmode->fd, lut,
+                                  sizeof(struct drm_color_lut) * size,
+                                  &blob_id)) {
         free(lut);
         return;
     }