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=-14.9 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,INCLUDES_PATCH,MAILING_LIST_MULTI, SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS,USER_AGENT_GIT autolearn=unavailable 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 2E829C43461 for ; Mon, 14 Sep 2020 17:14:46 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id D78E621D1A for ; Mon, 14 Sep 2020 17:14:45 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1600103685; bh=3wRgz9njpE+lwA5Lwdpi4A+ePptV7i/tL3UDcDxYKGE=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=rz2+WSulqz7agvAzWmpll1R16/Ub11oowNEJybc1rMwGZlAKW/dj6ZwTDXCEjUc4B IUGHaIIklaRyf2LG/I26ozwi3SBLolE4eIJChjjiZFqGmTDlcz2Y31AFtjk8k3abJ2 Evfc7M8B7HkfxQo1b2B2mQd5m9XYT14j+jzPE0xs= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726367AbgINROT (ORCPT ); Mon, 14 Sep 2020 13:14:19 -0400 Received: from mail.kernel.org ([198.145.29.99]:59554 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726585AbgINNEE (ORCPT ); Mon, 14 Sep 2020 09:04:04 -0400 Received: from sasha-vm.mshome.net (c-73-47-72-35.hsd1.nh.comcast.net [73.47.72.35]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id 2577621D1A; Mon, 14 Sep 2020 13:04:03 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1600088643; bh=3wRgz9njpE+lwA5Lwdpi4A+ePptV7i/tL3UDcDxYKGE=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=f8EpTVDi/sXnjw5oS38+ITiFAE9WjEDrHw6R5TJHbExMSyWGTFsdYI7chd3kjFqf5 dpwDKpAizTyPoR0cPax3tdSYz3reFwnkIAXZLJporCRNDXc9jics0NSj+P6W/i03i8 TZwx6TNvVgbYG2CYUX5cUgpPMf1J84zMkttxhsOo= From: Sasha Levin To: linux-kernel@vger.kernel.org, stable@vger.kernel.org Cc: Moti Haimovski , Oded Gabbay , Sasha Levin Subject: [PATCH AUTOSEL 5.8 04/29] habanalabs: prevent user buff overflow Date: Mon, 14 Sep 2020 09:03:33 -0400 Message-Id: <20200914130358.1804194-4-sashal@kernel.org> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20200914130358.1804194-1-sashal@kernel.org> References: <20200914130358.1804194-1-sashal@kernel.org> MIME-Version: 1.0 X-stable: review X-Patchwork-Hint: Ignore Content-Transfer-Encoding: 8bit Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Moti Haimovski [ Upstream commit 6396feabf7a4104a4ddfecc00b8aac535c631a66 ] This commit fixes a potential debugfs issue that may occur when reading the clock gating mask into the user buffer since the user buffer size was not taken into consideration. Signed-off-by: Moti Haimovski Reviewed-by: Oded Gabbay Signed-off-by: Oded Gabbay Signed-off-by: Sasha Levin --- drivers/misc/habanalabs/debugfs.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/misc/habanalabs/debugfs.c b/drivers/misc/habanalabs/debugfs.c index 6c2b9cf45e831..650922061bdc7 100644 --- a/drivers/misc/habanalabs/debugfs.c +++ b/drivers/misc/habanalabs/debugfs.c @@ -982,7 +982,7 @@ static ssize_t hl_clk_gate_read(struct file *f, char __user *buf, return 0; sprintf(tmp_buf, "0x%llx\n", hdev->clock_gating_mask); - rc = simple_read_from_buffer(buf, strlen(tmp_buf) + 1, ppos, tmp_buf, + rc = simple_read_from_buffer(buf, count, ppos, tmp_buf, strlen(tmp_buf) + 1); return rc; -- 2.25.1