From 8c9aebcdd9f46f7a14b98d6ab18574b7a48fbb08 Mon Sep 17 00:00:00 2001 From: David Rosca Date: Thu, 30 Jul 2026 17:37:44 +0200 Subject: [PATCH] drm/amdgpu: Reject UVD message with dimensions above 4096 Fixes potential overflow in DPB size calculations. Signed-off-by: David Rosca Acked-by: Leo Liu Reviewed-by: Ruijing Dong Signed-off-by: Alex Deucher (cherry picked from commit 05e1387d151f71569fbe122d2c89f9db0c21dc10) Cc: stable@vger.kernel.org --- drivers/gpu/drm/amd/amdgpu/amdgpu_uvd.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) 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); -- 2.30.2