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 9B7B030C143; Thu, 30 Jul 2026 15:48:36 +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=1785426517; cv=none; b=QDf6iJmiDWJiqjBLDDBH+p61tR0C7kZVhpfnRx44rFx0fw/CyugvNOT5RaYL8Bd+c9kwTyIEmAiiF26f9jjD2dJofBIf+/pHZR+qt0gsLUQyNfr74GRlCbv/akU0MsV6LcyG2SFnApVewziAFZbENcYTElfq5Wz2RsTTFg7YLkI= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1785426517; c=relaxed/simple; bh=ftB9T8RVO3n7qZRbu812U6pIVq6JpVa83tLneIxRF9w=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=RiXT3zHiJnbpJ2ACvLOexFsNw5N8hgxbyEf4l/UQZeswSaImI3ZZPgqFKFl1BnzkImvlfyLgK6e5ee8ZXJmn56Uw/FgeepcCQi8XNAdzCuC1FM66P31IdBwyTcox43mKRWLdOE+otBCcKKMB5WIMJz9VnceTmZZKNI8uaimwuTw= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=dOgr1IcE; 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="dOgr1IcE" Received: by smtp.kernel.org (Postfix) with ESMTPSA id AFD4B1F000E9; Thu, 30 Jul 2026 15:48:35 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linuxfoundation.org; s=korg; t=1785426516; bh=/dRcQJfHGpFV+axzzA7qgpWPJ/PtYPQRQ3Hrt6uath4=; h=From:To:Cc:Subject:Date:In-Reply-To:References; b=dOgr1IcEZB8VVtxxtvO7AWlfKVVjKwQzX5heptu0RXyE28xiQnwYyVpkwbL8574My Km2TPvMjpq8aZd6x3EQit5KCu2XsvqKGhrV7CR6mJ29VHaRiU//LEdEG/tSzrB918I tyjwNg8o8PbrhcdxZ9ZU18Fw7NqqqeKFMFNgLssE= 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 6.12 447/602] drm/amdgpu: fix division by zero with invalid uvd dimensions Date: Thu, 30 Jul 2026 16:13:59 +0200 Message-ID: <20260730141445.354301473@linuxfoundation.org> X-Mailer: git-send-email 2.55.0 In-Reply-To: <20260730141435.976815864@linuxfoundation.org> References: <20260730141435.976815864@linuxfoundation.org> User-Agent: quilt/0.69 X-stable: review X-Patchwork-Hint: ignore Precedence: bulk X-Mailing-List: stable@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit 6.12-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 @@ -654,6 +654,14 @@ 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);