From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from us-smtp-delivery-124.mimecast.com (us-smtp-delivery-124.mimecast.com [170.10.129.124]) (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 59D173BA229 for ; Wed, 29 Apr 2026 09:53:05 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=170.10.129.124 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1777456386; cv=none; b=BGsLfM0kDa3zErD7nlOaEzlTq4ZlDn5LhcJYPS6faz/Y9qgp4X0BEFSH48/vb/Hjxnmuq/INBqZajaUtMyWuuoNBuxPZlGBafhuJHzKkNEqIUvo7SKAco/6MKf1MyDKzBbC2aOAuWC8pnAbiP9me39RjD+Umvt2F3//8w8Ljtzs= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1777456386; c=relaxed/simple; bh=ARMJiQK4b4zHEIL+biAYPcz6LCdoox4fSNhJKM3B3YA=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=Tf0HN5jjYPTnOoGhtwfVZKFzAiAyl1SKyzhEDaV7SEZXcBGGFZZPKj1YkdKLgobNjX99hj4i9zBYyxxDNVPMVTQj9m/oIIL4pkv6/XqzWzsPm3+IKxCoQE5TQBM57xm8JjtQnlO18Vwpk/CjkhhN3+FR3EJeYG+jTi8D9KMovBE= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=quarantine dis=none) header.from=redhat.com; spf=pass smtp.mailfrom=redhat.com; dkim=pass (1024-bit key) header.d=redhat.com header.i=@redhat.com header.b=SxAWgOEs; arc=none smtp.client-ip=170.10.129.124 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=quarantine dis=none) header.from=redhat.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=redhat.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=redhat.com header.i=@redhat.com header.b="SxAWgOEs" DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1777456384; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=jvJ3vxSBzk5FsPg5bvaaE5ZBFTyjjD6iz6OfCrAzyHs=; b=SxAWgOEssDdKMhOW2nBB0Mwd3EV4Rx1GhF2vYNrAGkzz6pPKuYULjUOW5h99PpDjek2Nov LKWady962esaFtRD4NyQtFWQzjUOEo6Gv9SNHabwNWKs1Z8agZBYz4KSXO/iYE53g1o7EP hDmV2q7Z60TrPnDAmcUK4yJ8tlKFqWQ= Received: from mx-prod-mc-08.mail-002.prod.us-west-2.aws.redhat.com (ec2-35-165-154-97.us-west-2.compute.amazonaws.com [35.165.154.97]) by relay.mimecast.com with ESMTP with STARTTLS (version=TLSv1.3, cipher=TLS_AES_256_GCM_SHA384) id us-mta-619-V9A2mvalNouziWZdFQOlFQ-1; Wed, 29 Apr 2026 05:53:00 -0400 X-MC-Unique: V9A2mvalNouziWZdFQOlFQ-1 X-Mimecast-MFC-AGG-ID: V9A2mvalNouziWZdFQOlFQ_1777456378 Received: from mx-prod-int-06.mail-002.prod.us-west-2.aws.redhat.com (mx-prod-int-06.mail-002.prod.us-west-2.aws.redhat.com [10.30.177.93]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (2048 bits) server-digest SHA256) (No client certificate requested) by mx-prod-mc-08.mail-002.prod.us-west-2.aws.redhat.com (Postfix) with ESMTPS id 56E531800D92; Wed, 29 Apr 2026 09:52:58 +0000 (UTC) Received: from f43vm.redhat.corp (headnet01.pony-001.prod.iad2.dc.redhat.com [10.2.32.101]) by mx-prod-int-06.mail-002.prod.us-west-2.aws.redhat.com (Postfix) with ESMTP id 897461800480; Wed, 29 Apr 2026 09:52:53 +0000 (UTC) From: Sergio Lopez To: Chia-I Wu , Jason Wang , "Michael S. Tsirkin" , =?UTF-8?q?Eugenio=20P=C3=A9rez?= , Xuan Zhuo , linux-kernel@vger.kernel.org, Simona Vetter , Dmitry Osipenko , Thomas Zimmermann , David Airlie , Gurchetan Singh , Gerd Hoffmann , virtualization@lists.linux.dev, dri-devel@lists.freedesktop.org, Maxime Ripard , Maarten Lankhorst Cc: Sergio Lopez Subject: [PATCH v2 2/3] drm/virtio: honor blob_alignment requirements Date: Tue, 28 Apr 2026 21:44:49 +0200 Message-ID: <20260428194450.518296-3-slp@redhat.com> In-Reply-To: <20260428194450.518296-1-slp@redhat.com> References: <20260428194450.518296-1-slp@redhat.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Scanned-By: MIMEDefang 3.4.1 on 10.30.177.93 If VIRTIO_GPU_F_BLOB_ALIGNMENT has been negotiated, blob size must be aligned to blob_alignment. Validate this in verify_blob() so that invalid requests are rejected early. Signed-off-by: Sergio Lopez --- drivers/gpu/drm/virtio/virtgpu_ioctl.c | 5 +++++ 1 file changed, 5 insertions(+) diff --git a/drivers/gpu/drm/virtio/virtgpu_ioctl.c b/drivers/gpu/drm/virtio/virtgpu_ioctl.c index c33c057365f8..d0c4edf1eaf4 100644 --- a/drivers/gpu/drm/virtio/virtgpu_ioctl.c +++ b/drivers/gpu/drm/virtio/virtgpu_ioctl.c @@ -489,6 +489,11 @@ static int verify_blob(struct virtio_gpu_device *vgdev, params->size = rc_blob->size; params->blob = true; params->blob_flags = rc_blob->blob_flags; + + if (vgdev->has_blob_alignment && + !IS_ALIGNED(params->size, vgdev->blob_alignment)) + return -EINVAL; + return 0; } -- 2.53.0