From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-alma10-1.taild15c8.ts.net [100.103.45.18]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 0C2183B6366; Thu, 30 Jul 2026 14:53:45 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=100.103.45.18 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1785423226; cv=none; b=Yfo/juxbySIvU8DSW/LZsGtPx82xCIMFoeHEEwhwPR75fAFbLiAfIH699aNuhruhcNBmN0hruM+762621zKIHThx+Uw8+7UCPQtf49hymlk+kuJq2N2GW7g5hKQE5i3mymzrubjvV2KAXnd3pfvCmkuA1S18eJxO5ybDSMW8XNU= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1785423226; c=relaxed/simple; bh=4QJWl4vyuq9cADqI/e7isNG3dJUsR0M4YRVScjnsUoU=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=oJHqwc9OzahbCQHcgpjx1cRq3CNxBAQcbsGHJqQbFa86qdPC4iY4rVs9vs8uVhj/vjdiS1GQSxli5cCszeEngZzdJz44/YEPUVFrrmlZY+Vq7g5j4DuSZwPg6oWKOez3qthC67iBgfGOf6BOxA1b7DsIfvf4kZRTvGFR4S+SS7s= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=A22KfQSr; arc=none smtp.client-ip=100.103.45.18 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b="A22KfQSr" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 6686D1F000E9; Thu, 30 Jul 2026 14:53:44 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linuxfoundation.org; s=korg; t=1785423224; bh=8pvGNBCA7nC00V14Cj+RhA9Bi8OwgohA4Kh9sanHGOY=; h=From:To:Cc:Subject:Date:In-Reply-To:References; b=A22KfQSrOAW2AV2Ks8UnK0R0mBiqxkUH9cSZxM6GxH121O+p7OarQdMufu5oB3kFS vWO+1hdQyorGUY8XmrxI6AgFUOxv01A+TTJBJ0hxDVwz7ZsLz33l/t0YCkr06HQxgx lpdcV53UhapUnCMpptJIzUfK2d1ZSQcxvI5eRmCk= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Boyuan Zhang , Leo Liu , Alex Deucher Subject: [PATCH 7.1 711/744] drm/amdgpu: fix division by zero with invalid uvd dimensions Date: Thu, 30 Jul 2026 16:16:24 +0200 Message-ID: <20260730141459.391254525@linuxfoundation.org> X-Mailer: git-send-email 2.55.0 In-Reply-To: <20260730141444.267951807@linuxfoundation.org> References: <20260730141444.267951807@linuxfoundation.org> User-Agent: quilt/0.69 X-stable: review X-Patchwork-Hint: ignore Precedence: bulk X-Mailing-List: patches@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit 7.1-stable review patch. If anyone has any objections, please let me know. ------------------ From: Boyuan Zhang commit 0c01c811be47e6b146552dd59bfedbea8f09b8f4 upstream. When width or height is less than 16, width_in_mb or height_in_mb becomes 0, leading to fs_in_mb being 0. This causes a division by zero when calculating num_dpb_buffer in H264 and H264 Perf decode paths. Add validation to reject frames with width < 16 or height < 16 before performing any calculations that depend on these values. V2: Format change - move up all vaiable definitions. V3: Use warn_once to avoid spam. Signed-off-by: Boyuan Zhang Reviewed-by: Leo Liu Reviewed-by: Alex Deucher Signed-off-by: Alex Deucher (cherry picked from commit 3e41d26c70b0a459d041cc19482a226c4b7423cb) Cc: stable@vger.kernel.org Signed-off-by: Greg Kroah-Hartman --- drivers/gpu/drm/amd/amdgpu/amdgpu_uvd.c | 8 ++++++++ 1 file changed, 8 insertions(+) --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_uvd.c +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_uvd.c @@ -655,6 +655,14 @@ static int amdgpu_uvd_cs_msg_decode(stru 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) { + dev_WARN_ONCE(adev->dev, 1, + "Invalid UVD decoding dimensions (%dx%d)!\n", + width, height); + return -EINVAL; + } + image_size = width * height; image_size += image_size / 2; image_size = ALIGN(image_size, 1024);