From patchwork Fri Sep 8 19:59:44 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Philipp Stanner X-Patchwork-Id: 13377795 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 4FE56EEB56B for ; Fri, 8 Sep 2023 20:04:20 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1344482AbjIHUEW (ORCPT ); Fri, 8 Sep 2023 16:04:22 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:46432 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1344510AbjIHUEV (ORCPT ); Fri, 8 Sep 2023 16:04:21 -0400 Received: from us-smtp-delivery-124.mimecast.com (us-smtp-delivery-124.mimecast.com [170.10.129.124]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id C6B3CCF2 for ; Fri, 8 Sep 2023 13:03:32 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1694203412; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=w7XXAxDLUmZdx81fESQwCFLbPlVQDp3wBmzbmeWO24M=; b=c3h7XPFbBHsHy20pb8A3s365xSIrpDGHGQciJWa3bskMFGRnfvKGufr+/ulkkc+tay8S2q eVxu1st2JmHOf7wMMzLfeoUdKIdHVFJfc9HPiuEm2EQxj9D7b0SN/5jnTgt46BGETjkl3a kIRcVzIeyNNw+cvbbzkXwmSF1Wberu8= Received: from mail-oo1-f70.google.com (mail-oo1-f70.google.com [209.85.161.70]) by relay.mimecast.com with ESMTP with STARTTLS (version=TLSv1.3, cipher=TLS_AES_256_GCM_SHA384) id us-mta-669-oL7M8f36Pa2h0gd9_D5O1Q-1; Fri, 08 Sep 2023 16:03:29 -0400 X-MC-Unique: oL7M8f36Pa2h0gd9_D5O1Q-1 Received: by mail-oo1-f70.google.com with SMTP id 006d021491bc7-5711c85f02bso414322eaf.0 for ; Fri, 08 Sep 2023 13:03:28 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1694203408; x=1694808208; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:x-gm-message-state:from:to:cc :subject:date:message-id:reply-to; bh=w7XXAxDLUmZdx81fESQwCFLbPlVQDp3wBmzbmeWO24M=; b=lzAxyGlwxD9eFuRelHv3VIfecM6HKCrmAfAHQxSffOBFvdPD6s+hVPTG8cs9718ALB ydys3n055UxOzns2VpaEE1+jMuQdEwD9ZgzncdtYjBodK2QFaV5ialVYDyNV6jUzEt/t t7MdB8w5iOdU6I8+U6HOyUaxPrZKmQoL+5aEwMNoX1QzQQXtkeqGD+FwRTkDdJL9O5Bb WBgM7N44Y6x4EOF3zqJ8sCFpCefDTyR1ESL1cHvw+CVLMhD3pwJVfTtu0DHhJ6ExwjVO 5zuZ2EFNu9jCQ24//wfNrykyLy+vOVyaYaAQ+UjhP0atSvcIZJzrdamYkhyEG+yhSPn0 DIcQ== X-Gm-Message-State: AOJu0YxJQYG+uEqbhSYwM9Vg+X1CZC/W81xCO7Y/A1mnVmh+7EcIuNGg WP/xjMD3DE8PXrGKKIo4yx9DdtSNURTpQWymEIWqZHGG5AeIIR+muQMPoXbLT820dUzXShGyz1m AJVqYG/mQinhL7pI9wpQutrlQZkk/ X-Received: by 2002:a05:6358:e9c:b0:134:c407:681f with SMTP id 28-20020a0563580e9c00b00134c407681fmr2557578rwg.1.1694203408125; Fri, 08 Sep 2023 13:03:28 -0700 (PDT) X-Google-Smtp-Source: AGHT+IE4gCAzKUix7oIOcBNdjPHJEb7aCyOwwUAu2PzcC43CT3hwK4BjknICUG8MLI4Ii5zItWgaJg== X-Received: by 2002:a05:6358:e9c:b0:134:c407:681f with SMTP id 28-20020a0563580e9c00b00134c407681fmr2557556rwg.1.1694203407699; Fri, 08 Sep 2023 13:03:27 -0700 (PDT) Received: from fedorinator.redhat.com ([2001:9e8:32da:e500:513e:fbe9:e455:ae67]) by smtp.gmail.com with ESMTPSA id x29-20020a0cb21d000000b0064f53943626sm971150qvd.89.2023.09.08.13.03.24 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 08 Sep 2023 13:03:27 -0700 (PDT) From: Philipp Stanner To: Kees Cook , Andy Shevchenko , Eric Biederman , Christian Brauner , David Disseldorp , Luis Chamberlain , Siddh Raman Pant , Nick Alcock , Maarten Lankhorst , Maxime Ripard , Thomas Zimmermann , David Airlie , Daniel Vetter , Zack Rusin Cc: VMware Graphics Reviewers , dri-devel@lists.freedesktop.org, linux-kernel@vger.kernel.org, kexec@lists.infradead.org, linux-hardening@vger.kernel.org, Philipp Stanner , David Airlie Subject: [PATCH v2 5/5] drm: vmgfx_surface.c: copy user-array safely Date: Fri, 8 Sep 2023 21:59:44 +0200 Message-ID: <3d2b36a2cf7bbff1b036f474eb805e19be3c57f5.1694202430.git.pstanner@redhat.com> X-Mailer: git-send-email 2.41.0 In-Reply-To: References: MIME-Version: 1.0 X-Mimecast-Spam-Score: 0 X-Mimecast-Originator: redhat.com Precedence: bulk List-ID: X-Mailing-List: linux-hardening@vger.kernel.org Currently, there is no overflow-check with memdup_user(). Use the new function memdup_array_user() instead of memdup_user() for duplicating the user-space array safely. Suggested-by: David Airlie Signed-off-by: Philipp Stanner --- drivers/gpu/drm/vmwgfx/vmwgfx_surface.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/drivers/gpu/drm/vmwgfx/vmwgfx_surface.c b/drivers/gpu/drm/vmwgfx/vmwgfx_surface.c index 5db403ee8261..9be185b094cb 100644 --- a/drivers/gpu/drm/vmwgfx/vmwgfx_surface.c +++ b/drivers/gpu/drm/vmwgfx/vmwgfx_surface.c @@ -777,9 +777,9 @@ int vmw_surface_define_ioctl(struct drm_device *dev, void *data, sizeof(metadata->mip_levels)); metadata->num_sizes = num_sizes; metadata->sizes = - memdup_user((struct drm_vmw_size __user *)(unsigned long) + memdup_array_user((struct drm_vmw_size __user *)(unsigned long) req->size_addr, - sizeof(*metadata->sizes) * metadata->num_sizes); + metadata->num_sizes, sizeof(*metadata->sizes)); if (IS_ERR(metadata->sizes)) { ret = PTR_ERR(metadata->sizes); goto out_no_sizes;