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 Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 51434C7618A for ; Wed, 15 Mar 2023 12:18:39 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231848AbjCOMSi (ORCPT ); Wed, 15 Mar 2023 08:18:38 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:43556 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S232081AbjCOMSa (ORCPT ); Wed, 15 Mar 2023 08:18:30 -0400 Received: from dfw.source.kernel.org (dfw.source.kernel.org [IPv6:2604:1380:4641:c500::1]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 8B7AB85B34 for ; Wed, 15 Mar 2023 05:18:22 -0700 (PDT) Received: from smtp.kernel.org (relay.kernel.org [52.25.139.140]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by dfw.source.kernel.org (Postfix) with ESMTPS id 1519D61D53 for ; Wed, 15 Mar 2023 12:18:22 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 27565C433D2; Wed, 15 Mar 2023 12:18:20 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1678882701; bh=JWhRr6nvOpStIxsRzw8J+7OUiEzgYHXpj6SEdW9AJBk=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=UxUziL75Ws7ypl/CmorE5cBn4/0agdE3zxRdJnx6u3k2PePtFn0rYQqZHwWoY5SYc j/7+MQ/P/i8QjtNmLY4qgN2DEiXAasi91hDPEUDrmZp4uvHx2wNCAaECG4AVn5lZeR JtF6DHUIQyJdELx6XKalLccsfQWOK2oJZmKT1RBI= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Kang Chen , Krzysztof Kozlowski , Simon Horman , Paolo Abeni , Sasha Levin Subject: [PATCH 5.4 37/68] nfc: fdp: add null check of devm_kmalloc_array in fdp_nci_i2c_read_device_properties Date: Wed, 15 Mar 2023 13:12:31 +0100 Message-Id: <20230315115727.565817538@linuxfoundation.org> X-Mailer: git-send-email 2.40.0 In-Reply-To: <20230315115726.103942885@linuxfoundation.org> References: <20230315115726.103942885@linuxfoundation.org> User-Agent: quilt/0.67 MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: stable@vger.kernel.org From: Kang Chen [ Upstream commit 11f180a5d62a51b484e9648f9b310e1bd50b1a57 ] devm_kmalloc_array may fails, *fw_vsc_cfg might be null and cause out-of-bounds write in device_property_read_u8_array later. Fixes: a06347c04c13 ("NFC: Add Intel Fields Peak NFC solution driver") Signed-off-by: Kang Chen Reviewed-by: Krzysztof Kozlowski Reviewed-by: Simon Horman Link: https://lore.kernel.org/r/20230227093037.907654-1-void0red@gmail.com Signed-off-by: Paolo Abeni Signed-off-by: Sasha Levin --- drivers/nfc/fdp/i2c.c | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/drivers/nfc/fdp/i2c.c b/drivers/nfc/fdp/i2c.c index ad0abb1f0bae9..7305f1a06e97c 100644 --- a/drivers/nfc/fdp/i2c.c +++ b/drivers/nfc/fdp/i2c.c @@ -255,6 +255,9 @@ static void fdp_nci_i2c_read_device_properties(struct device *dev, len, sizeof(**fw_vsc_cfg), GFP_KERNEL); + if (!*fw_vsc_cfg) + goto alloc_err; + r = device_property_read_u8_array(dev, FDP_DP_FW_VSC_CFG_NAME, *fw_vsc_cfg, len); @@ -268,6 +271,7 @@ static void fdp_nci_i2c_read_device_properties(struct device *dev, *fw_vsc_cfg = NULL; } +alloc_err: dev_dbg(dev, "Clock type: %d, clock frequency: %d, VSC: %s", *clock_type, *clock_freq, *fw_vsc_cfg != NULL ? "yes" : "no"); } -- 2.39.2