From: David Rosca <david.rosca@amd.com>
Date: Thu, 30 Jul 2026 15:37:44 +0000 (+0200)
Subject: drm/amdgpu: Reject UVD message with dimensions above 4096
X-Git-Tag: v7.2~13^2~2^2~9
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=8c9aebcdd9f46f7a14b98d6ab18574b7a48fbb08;p=thirdparty%2Fkernel%2Flinux.git

drm/amdgpu: Reject UVD message with dimensions above 4096

Fixes potential overflow in DPB size calculations.

Signed-off-by: David Rosca <david.rosca@amd.com>
Acked-by: Leo Liu <leo.liu@amd.com>
Reviewed-by: Ruijing Dong <ruijing.dong@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
(cherry picked from commit 05e1387d151f71569fbe122d2c89f9db0c21dc10)
Cc: stable@vger.kernel.org
---

diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_uvd.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_uvd.c
index 23383ac5323f..08b199518e22 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_uvd.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_uvd.c
@@ -655,8 +655,8 @@ static int amdgpu_uvd_cs_msg_decode(struct amdgpu_device *adev, uint32_t *msg,
 	unsigned int image_size, tmp, min_dpb_size, num_dpb_buffer;
 	unsigned int min_ctx_size = ~0;
 
-	/* Reject invalid dimensions to prevent division by zero */
-	if (width < 16 || height < 16) {
+	/* Reject invalid dimensions */
+	if (width < 16 || height < 16 || width > 4096 || height > 4096) {
 		dev_WARN_ONCE(adev->dev, 1,
 			      "Invalid UVD decoding dimensions (%dx%d)!\n",
 			      width, height);