From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-9.6 required=3.0 tests=DKIM_INVALID,DKIM_SIGNED, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY, SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,USER_AGENT_GIT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 64D35FC6197 for ; Thu, 7 Nov 2019 19:39:57 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 3C97E21D7E for ; Thu, 7 Nov 2019 19:39:57 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=fail reason="key not found in DNS" (0-bit key) header.d=codeaurora.org header.i=@codeaurora.org header.b="PsinT6Kb"; dkim=fail reason="key not found in DNS" (0-bit key) header.d=codeaurora.org header.i=@codeaurora.org header.b="YP5aD1o5" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726925AbfKGTj4 (ORCPT ); Thu, 7 Nov 2019 14:39:56 -0500 Received: from smtp.codeaurora.org ([198.145.29.96]:38362 "EHLO smtp.codeaurora.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726061AbfKGTj4 (ORCPT ); Thu, 7 Nov 2019 14:39:56 -0500 Received: by smtp.codeaurora.org (Postfix, from userid 1000) id 4604260DF5; Thu, 7 Nov 2019 19:39:55 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=codeaurora.org; s=default; t=1573155595; bh=UK0XZ92g/IIjpWep34YQXzvpLba/PkL2hhMeVbUbS/c=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=PsinT6KbpoUKkCtLojsZnlG3fStePyR5/Y4ZtppU99Xo8B/N12hfLPO1EEB6b/UtY RYYMYAGQmluKBtUzuQuD7d7QxhRhJuyWZBaQVpLXqOVoQ4R4TDqIYtviUqm48yvHg3 D8Prtf3k/AeXwqxKxXPPJm6WCkb8TOQCGNvJ0ftg= Received: from cohens-linux.qualcomm.com (global_nat1_iad_fw.qualcomm.com [129.46.232.65]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-SHA256 (128/128 bits)) (No client certificate requested) (Authenticated sender: cohens@smtp.codeaurora.org) by smtp.codeaurora.org (Postfix) with ESMTPSA id 36E8360D90; Thu, 7 Nov 2019 19:39:53 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=codeaurora.org; s=default; t=1573155594; bh=UK0XZ92g/IIjpWep34YQXzvpLba/PkL2hhMeVbUbS/c=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=YP5aD1o5Hvr+N9hun7LDYclVS+bFnkZbbsOG1esLU/EDODRX2rpKJ7C62NislV/9o uofHyNonJehfZzMPilMscuAMpcgyc5PTh983me9NtlDyBsKu59hbu/6bfZARXCI2lG pxD+XI6bPNuWlfWwcge/xeL8TgwjgamuON8ilQVw= DMARC-Filter: OpenDMARC Filter v1.3.2 smtp.codeaurora.org 36E8360D90 Authentication-Results: pdx-caf-mail.web.codeaurora.org; dmarc=none (p=none dis=none) header.from=codeaurora.org Authentication-Results: pdx-caf-mail.web.codeaurora.org; spf=none smtp.mailfrom=cohens@codeaurora.org From: Steve Cohen To: dri-devel@lists.freedesktop.org, freedreno@lists.freedesktop.org, linux-arm-msm@vger.kernel.org Cc: pdhaval@codeaurora.org, seanpaul@chromium.org, adelva@google.com, Steve Cohen Subject: [PATCH 3/3] drm/msm/dpu: check blob limitations during create blob ioctl Date: Thu, 7 Nov 2019 14:39:14 -0500 Message-Id: <1573155554-16248-4-git-send-email-cohens@codeaurora.org> X-Mailer: git-send-email 2.7.4 In-Reply-To: <1573155554-16248-1-git-send-email-cohens@codeaurora.org> References: <1573155554-16248-1-git-send-email-cohens@codeaurora.org> Sender: linux-arm-msm-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-arm-msm@vger.kernel.org Limit the blob size and number of blobs that can be allocated by a client. This prevents fuzzers from abusing this ioctl and exhausting the system memory. Signed-off-by: Steve Cohen --- drivers/gpu/drm/msm/disp/dpu1/dpu_kms.c | 14 ++++++++++++++ 1 file changed, 14 insertions(+) diff --git a/drivers/gpu/drm/msm/disp/dpu1/dpu_kms.c b/drivers/gpu/drm/msm/disp/dpu1/dpu_kms.c index 6c92f0f..5fbb7c3 100644 --- a/drivers/gpu/drm/msm/disp/dpu1/dpu_kms.c +++ b/drivers/gpu/drm/msm/disp/dpu1/dpu_kms.c @@ -41,6 +41,8 @@ */ #define DPU_DEBUGFS_DIR "msm_dpu" #define DPU_DEBUGFS_HWMASKNAME "hw_log_mask" +#define MAX_BLOB_PROP_SIZE (PAGE_SIZE * 30) +#define MAX_BLOB_PROP_COUNT 250 static int dpu_kms_hw_init(struct msm_kms *kms); static void _dpu_kms_mmu_destroy(struct dpu_kms *dpu_kms); @@ -544,6 +546,17 @@ static int _dpu_kms_drm_obj_init(struct dpu_kms *dpu_kms) return ret; } +static int dpu_kms_createblob_check(unsigned int count, size_t length) +{ + if (count >= MAX_BLOB_PROP_COUNT) + return -EINVAL; + + if (length > MAX_BLOB_PROP_SIZE) + return -EINVAL; + + return 0; +} + static long dpu_kms_round_pixclk(struct msm_kms *kms, unsigned long rate, struct drm_encoder *encoder) { @@ -683,6 +696,7 @@ static const struct msm_kms_funcs kms_funcs = { #ifdef CONFIG_DEBUG_FS .debugfs_init = dpu_kms_debugfs_init, #endif + .createblob_check = dpu_kms_createblob_check, }; static void _dpu_kms_mmu_destroy(struct dpu_kms *dpu_kms) -- The Qualcomm Innovation Center, Inc. is a member of the Code Aurora Forum, a Linux Foundation Collaborative Project From mboxrd@z Thu Jan 1 00:00:00 1970 From: Steve Cohen Subject: [PATCH 3/3] drm/msm/dpu: check blob limitations during create blob ioctl Date: Thu, 7 Nov 2019 14:39:14 -0500 Message-ID: <1573155554-16248-4-git-send-email-cohens@codeaurora.org> References: <1573155554-16248-1-git-send-email-cohens@codeaurora.org> Mime-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: base64 Return-path: In-Reply-To: <1573155554-16248-1-git-send-email-cohens-sgV2jX0FEOL9JmXXK+q4OQ@public.gmane.org> List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: freedreno-bounces-PD4FTy7X32lNgt0PjOBp9y5qC8QIuHrW@public.gmane.org Sender: "Freedreno" To: dri-devel-PD4FTy7X32lNgt0PjOBp9y5qC8QIuHrW@public.gmane.org, freedreno-PD4FTy7X32lNgt0PjOBp9y5qC8QIuHrW@public.gmane.org, linux-arm-msm-u79uwXL29TY76Z2rM5mHXA@public.gmane.org Cc: adelva-hpIqsD4AKlfQT0dZR+AlfA@public.gmane.org, Steve Cohen , pdhaval-sgV2jX0FEOL9JmXXK+q4OQ@public.gmane.org, seanpaul-F7+t8E8rja9g9hUCZPvPmw@public.gmane.org List-Id: dri-devel@lists.freedesktop.org TGltaXQgdGhlIGJsb2Igc2l6ZSBhbmQgbnVtYmVyIG9mIGJsb2JzIHRoYXQgY2FuIGJlIGFsbG9j YXRlZApieSBhIGNsaWVudC4gVGhpcyBwcmV2ZW50cyBmdXp6ZXJzIGZyb20gYWJ1c2luZyB0aGlz IGlvY3RsIGFuZApleGhhdXN0aW5nIHRoZSBzeXN0ZW0gbWVtb3J5LgoKU2lnbmVkLW9mZi1ieTog U3RldmUgQ29oZW4gPGNvaGVuc0Bjb2RlYXVyb3JhLm9yZz4KLS0tCiBkcml2ZXJzL2dwdS9kcm0v bXNtL2Rpc3AvZHB1MS9kcHVfa21zLmMgfCAxNCArKysrKysrKysrKysrKwogMSBmaWxlIGNoYW5n ZWQsIDE0IGluc2VydGlvbnMoKykKCmRpZmYgLS1naXQgYS9kcml2ZXJzL2dwdS9kcm0vbXNtL2Rp c3AvZHB1MS9kcHVfa21zLmMgYi9kcml2ZXJzL2dwdS9kcm0vbXNtL2Rpc3AvZHB1MS9kcHVfa21z LmMKaW5kZXggNmM5MmYwZi4uNWZiYjdjMyAxMDA2NDQKLS0tIGEvZHJpdmVycy9ncHUvZHJtL21z bS9kaXNwL2RwdTEvZHB1X2ttcy5jCisrKyBiL2RyaXZlcnMvZ3B1L2RybS9tc20vZGlzcC9kcHUx L2RwdV9rbXMuYwpAQCAtNDEsNiArNDEsOCBAQAogICovCiAjZGVmaW5lIERQVV9ERUJVR0ZTX0RJ UiAibXNtX2RwdSIKICNkZWZpbmUgRFBVX0RFQlVHRlNfSFdNQVNLTkFNRSAiaHdfbG9nX21hc2si CisjZGVmaW5lIE1BWF9CTE9CX1BST1BfU0laRQkoUEFHRV9TSVpFICogMzApCisjZGVmaW5lIE1B WF9CTE9CX1BST1BfQ09VTlQJMjUwCiAKIHN0YXRpYyBpbnQgZHB1X2ttc19od19pbml0KHN0cnVj dCBtc21fa21zICprbXMpOwogc3RhdGljIHZvaWQgX2RwdV9rbXNfbW11X2Rlc3Ryb3koc3RydWN0 IGRwdV9rbXMgKmRwdV9rbXMpOwpAQCAtNTQ0LDYgKzU0NiwxNyBAQCBzdGF0aWMgaW50IF9kcHVf a21zX2RybV9vYmpfaW5pdChzdHJ1Y3QgZHB1X2ttcyAqZHB1X2ttcykKIAlyZXR1cm4gcmV0Owog fQogCitzdGF0aWMgaW50IGRwdV9rbXNfY3JlYXRlYmxvYl9jaGVjayh1bnNpZ25lZCBpbnQgY291 bnQsIHNpemVfdCBsZW5ndGgpCit7CisJaWYgKGNvdW50ID49IE1BWF9CTE9CX1BST1BfQ09VTlQp CisJCXJldHVybiAtRUlOVkFMOworCisJaWYgKGxlbmd0aCA+IE1BWF9CTE9CX1BST1BfU0laRSkK KwkJcmV0dXJuIC1FSU5WQUw7CisKKwlyZXR1cm4gMDsKK30KKwogc3RhdGljIGxvbmcgZHB1X2tt c19yb3VuZF9waXhjbGsoc3RydWN0IG1zbV9rbXMgKmttcywgdW5zaWduZWQgbG9uZyByYXRlLAog CQlzdHJ1Y3QgZHJtX2VuY29kZXIgKmVuY29kZXIpCiB7CkBAIC02ODMsNiArNjk2LDcgQEAgc3Rh dGljIGNvbnN0IHN0cnVjdCBtc21fa21zX2Z1bmNzIGttc19mdW5jcyA9IHsKICNpZmRlZiBDT05G SUdfREVCVUdfRlMKIAkuZGVidWdmc19pbml0ICAgID0gZHB1X2ttc19kZWJ1Z2ZzX2luaXQsCiAj ZW5kaWYKKwkuY3JlYXRlYmxvYl9jaGVjayA9IGRwdV9rbXNfY3JlYXRlYmxvYl9jaGVjaywKIH07 CiAKIHN0YXRpYyB2b2lkIF9kcHVfa21zX21tdV9kZXN0cm95KHN0cnVjdCBkcHVfa21zICpkcHVf a21zKQotLSAKVGhlIFF1YWxjb21tIElubm92YXRpb24gQ2VudGVyLCBJbmMuIGlzIGEgbWVtYmVy IG9mIHRoZSBDb2RlIEF1cm9yYSBGb3J1bSwKYSBMaW51eCBGb3VuZGF0aW9uIENvbGxhYm9yYXRp dmUgUHJvamVjdAoKX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19f X18KRnJlZWRyZW5vIG1haWxpbmcgbGlzdApGcmVlZHJlbm9AbGlzdHMuZnJlZWRlc2t0b3Aub3Jn Cmh0dHBzOi8vbGlzdHMuZnJlZWRlc2t0b3Aub3JnL21haWxtYW4vbGlzdGluZm8vZnJlZWRyZW5v From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-9.8 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS, USER_AGENT_GIT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id AEB5CC5DF60 for ; 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Thu, 7 Nov 2019 19:39:53 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 smtp.codeaurora.org 36E8360D90 From: Steve Cohen To: dri-devel@lists.freedesktop.org, freedreno@lists.freedesktop.org, linux-arm-msm@vger.kernel.org Subject: [PATCH 3/3] drm/msm/dpu: check blob limitations during create blob ioctl Date: Thu, 7 Nov 2019 14:39:14 -0500 Message-Id: <1573155554-16248-4-git-send-email-cohens@codeaurora.org> X-Mailer: git-send-email 2.7.4 In-Reply-To: <1573155554-16248-1-git-send-email-cohens@codeaurora.org> References: <1573155554-16248-1-git-send-email-cohens@codeaurora.org> X-Mailman-Approved-At: Fri, 08 Nov 2019 08:12:31 +0000 X-Mailman-Original-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=codeaurora.org; s=default; t=1573155594; bh=UK0XZ92g/IIjpWep34YQXzvpLba/PkL2hhMeVbUbS/c=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=YP5aD1o5Hvr+N9hun7LDYclVS+bFnkZbbsOG1esLU/EDODRX2rpKJ7C62NislV/9o uofHyNonJehfZzMPilMscuAMpcgyc5PTh983me9NtlDyBsKu59hbu/6bfZARXCI2lG pxD+XI6bPNuWlfWwcge/xeL8TgwjgamuON8ilQVw= X-Mailman-Original-DKIM-Signature: v=1; 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