From patchwork Fri Sep 22 17:32:12 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Kees Cook X-Patchwork-Id: 13396087 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 4674BCD4846 for ; Fri, 22 Sep 2023 17:33:16 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S233543AbjIVRdT (ORCPT ); Fri, 22 Sep 2023 13:33:19 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:49396 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S233438AbjIVRcu (ORCPT ); Fri, 22 Sep 2023 13:32:50 -0400 Received: from mail-pl1-x629.google.com (mail-pl1-x629.google.com [IPv6:2607:f8b0:4864:20::629]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 7CD5310F6 for ; Fri, 22 Sep 2023 10:32:26 -0700 (PDT) Received: by mail-pl1-x629.google.com with SMTP id d9443c01a7336-1c3f97f2239so22154595ad.0 for ; Fri, 22 Sep 2023 10:32:26 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=chromium.org; s=google; t=1695403946; x=1696008746; darn=vger.kernel.org; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:from:to:cc:subject:date :message-id:reply-to; bh=WTtgeSpUdLuurLr/un8bnu1axQ+1dpOqA/3ccL3TFAo=; b=RiZkqDxwPqiamDEPM6ALZ/ULcNxNIdY6CQequLRSq3ojpcEsCci+2dR63iJs3wo6RE GJ3QlvFt+RKQNkbJ3UyedpBTu/UuHhh3EgZ1agWpoJWL36PIZNAGaspCHfZCVFycCgUf D2cCaxVOgYQQLzqIfu+edsJpHoI8JOcJoduIc= X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1695403946; x=1696008746; 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=WTtgeSpUdLuurLr/un8bnu1axQ+1dpOqA/3ccL3TFAo=; b=EOPNjsFhrSw/DN+wxMo525iCla5s3vt6zklH4+61qNsFZ5CTdKlRvf5BIc8o0UuA2/ xdt7pGx7DuglHS0zx9+AhQRZY+8fLbv4Y+57nD3V/HBsigc0KgnQuilWVmad1M3mYP93 Fy1rvynazlerh4nXJAfW47f6WmV8LQ1hMJ/hMt2PtPdDgA7hZrz4ViYV75OZ44WQB91a InVU1DWHiAnjqwImVR+h0dYhyMphqz7IMPSI4DDPZm4fvuRh5b0t4L6t/gr8fY5o29vM FoUAE5O5Gem/tzjFQR2J5Gg+adkgRrGdxhLSt2x2soavnWLPhF/Tyf0AUGY+Qb7FLPTL FoqQ== X-Gm-Message-State: AOJu0YzB0S/g35wHw9tzy7hOjmrCuqATr4TCdfGjyjqOIdo+gCD6QJSL 07m1aYCisgEhkAcMwSfqkVaGQFvYiRdJcKI21w0= X-Google-Smtp-Source: AGHT+IE4NKtjB8q0iCY5uRpFdVHfLGOGnUW9ndbQ3iwuIKZUl+ACrzobHns1ItGFQZS667ZYOrI2ZA== X-Received: by 2002:a17:902:6944:b0:1bc:c82:9368 with SMTP id k4-20020a170902694400b001bc0c829368mr112509plt.32.1695403945964; Fri, 22 Sep 2023 10:32:25 -0700 (PDT) Received: from www.outflux.net (198-0-35-241-static.hfc.comcastbusiness.net. [198.0.35.241]) by smtp.gmail.com with ESMTPSA id y3-20020a170902864300b001b0358848b0sm3747353plt.161.2023.09.22.10.32.20 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 22 Sep 2023 10:32:22 -0700 (PDT) From: Kees Cook To: David Airlie Cc: Kees Cook , David Airlie , Gerd Hoffmann , Gurchetan Singh , Chia-I Wu , Daniel Vetter , dri-devel@lists.freedesktop.org, virtualization@lists.linux-foundation.org, Emma Anholt , Evan Quan , Alex Deucher , =?utf-8?q?Christian_K=C3=B6nig?= , "Pan, Xinhui" , Xiaojian Du , Huang Rui , Kevin Wang , Hawking Zhang , Jani Nikula , Joonas Lahtinen , Rodrigo Vivi , Tvrtko Ursulin , Chris Wilson , John Harrison , Andi Shyti , Matthew Brost , Rob Clark , Abhinav Kumar , Dmitry Baryshkov , Sean Paul , Marijn Suijten , Bjorn Andersson , Ben Skeggs , Karol Herbst , Lyude Paul , Maxime Ripard , Zack Rusin , VMware Graphics Reviewers , Melissa Wen , Nathan Chancellor , Nick Desaulniers , Tom Rix , Le Ma , Lijo Lazar , Yifan Zhang , Prike Liang , Lang Yu , Tejas Upadhyay , Nirmoy Das , Andrzej Hajda , Neil Armstrong , Kuogee Hsieh , linux-kernel@vger.kernel.org, amd-gfx@lists.freedesktop.org, intel-gfx@lists.freedesktop.org, linux-arm-msm@vger.kernel.org, freedreno@lists.freedesktop.org, nouveau@lists.freedesktop.org, llvm@lists.linux.dev, linux-hardening@vger.kernel.org Subject: [PATCH 7/9] drm/virtio: Annotate struct virtio_gpu_object_array with __counted_by Date: Fri, 22 Sep 2023 10:32:12 -0700 Message-Id: <20230922173216.3823169-7-keescook@chromium.org> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20230922173110.work.084-kees@kernel.org> References: <20230922173110.work.084-kees@kernel.org> MIME-Version: 1.0 X-Developer-Signature: v=1; a=openpgp-sha256; l=1417; i=keescook@chromium.org; h=from:subject; bh=eZm0aznK0m8B2PZ9kKPoriymoURbDsQWuTqSiG5Zn6g=; b=owEBbQKS/ZANAwAKAYly9N/cbcAmAcsmYgBlDc+ecN7AHVyI0F/T2hAcEM09nm5XXW5LLfQTE HSHvLmbqbqJAjMEAAEKAB0WIQSlw/aPIp3WD3I+bhOJcvTf3G3AJgUCZQ3PngAKCRCJcvTf3G3A JmrOD/wOpyQVRHrGQGo8XfD5jMBVmYMEWa7mtPz8TQHyKwul0h4DAnDuY1syEElYvTvb0qCuTg6 YHpqfYbVJonRUjUd83cqsdEqsNMRkx8ryd+FwIwDMcHFmp3kEWfg5s9zyJpQlhMbIA8qRhFRzp6 1nctWnxSwK5Y+R6FATebIjhT9U2Y8CD6khRnkG9NQuimrbhgcl/f447wIiYiu5X7idIzuMwSDFR Prf1JJwDz4YkxahRTnX8WrJXhYUDJjWqyw7MOMkMW6ybVBIL8ie1WLAZlKfuNoq/ypItBU4eAMz +BDqWKau3tdzcpK42SAJNB9SVOIvsM8EHP5boshP1NmOAEdUKG8SXMJr6bbYAfFt/Zdk5ZmYfpJ Yxipt98I+ZRxsbNFS4Y+4kVDYW0QBySazXXvWa8U736thID88na3V/aHvwB4Ql0tKp5Mk3oaHjZ VIJkT0hMJ0c+tnjLvg6pHMeQM7yKNB+s0mGuL84RFj6OyWPATVyWvcrsQ/dAxuy53EitcBlWyzG OhHlG4pbiUAIcoN9Kju8k9tthCpSQohkyEr1pwg2o2OfnyfTD7GoFuTt85RlHxHFcx2PYl1nV2x FeRCY+2qIpNwX19xvQ8Lx3Vt8SeFDNnJWY5M6UFCEs1Kyk4337zXOTTH+xiGEYKfZpRPhfZZ+7Z CzpyiCN8tLdjdOg== X-Developer-Key: i=keescook@chromium.org; a=openpgp; fpr=A5C3F68F229DD60F723E6E138972F4DFDC6DC026 Precedence: bulk List-ID: X-Mailing-List: linux-arm-msm@vger.kernel.org Prepare for the coming implementation by GCC and Clang of the __counted_by attribute. Flexible array members annotated with __counted_by can have their accesses bounds-checked at run-time checking via CONFIG_UBSAN_BOUNDS (for array indexing) and CONFIG_FORTIFY_SOURCE (for strcpy/memcpy-family functions). As found with Coccinelle[1], add __counted_by for struct virtio_gpu_object_array. [1] https://github.com/kees/kernel-tools/blob/trunk/coccinelle/examples/counted_by.cocci Cc: David Airlie Cc: Gerd Hoffmann Cc: Gurchetan Singh Cc: Chia-I Wu Cc: Daniel Vetter Cc: dri-devel@lists.freedesktop.org Cc: virtualization@lists.linux-foundation.org Signed-off-by: Kees Cook Reviewed-by: Gustavo A. R. Silva --- drivers/gpu/drm/virtio/virtgpu_drv.h | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/gpu/drm/virtio/virtgpu_drv.h b/drivers/gpu/drm/virtio/virtgpu_drv.h index 8513b671f871..96365a772f77 100644 --- a/drivers/gpu/drm/virtio/virtgpu_drv.h +++ b/drivers/gpu/drm/virtio/virtgpu_drv.h @@ -119,7 +119,7 @@ struct virtio_gpu_object_array { struct ww_acquire_ctx ticket; struct list_head next; u32 nents, total; - struct drm_gem_object *objs[]; + struct drm_gem_object *objs[] __counted_by(total); }; struct virtio_gpu_vbuffer;