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 94D8DC761AF for ; Mon, 3 Apr 2023 14:37:58 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S233696AbjDCOh5 (ORCPT ); Mon, 3 Apr 2023 10:37:57 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:48112 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S233715AbjDCOhy (ORCPT ); Mon, 3 Apr 2023 10:37:54 -0400 Received: from ams.source.kernel.org (ams.source.kernel.org [IPv6:2604:1380:4601:e00::1]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 5037A1765B for ; Mon, 3 Apr 2023 07:37:37 -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 ams.source.kernel.org (Postfix) with ESMTPS id CB608B81CC3 for ; Mon, 3 Apr 2023 14:37:35 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 2D22FC433D2; Mon, 3 Apr 2023 14:37:34 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1680532654; bh=11A643II97k5BJwesN/mhwYq8mIX6gHm7xWFgzm2iaY=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=K27CayfRUaRoCMhl8eiG8AtFyItBGRqooIEL45qHbt/MpbYfBtMvau+YiZeaPyLfN 8jgQTpq+DuXT3nvqMgTknASDZxNd5Soc5SQrigfSUsiTKbSVazKqLn6++TQAjpw1VG UbYnXKs78Qc2Fi1OE4C8RnPm2jFaaxX9GtSMASTo= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Arseniy Krasnov , Martin Blumenstingl , Neil Armstrong , Miquel Raynal , Sasha Levin Subject: [PATCH 6.1 066/181] mtd: rawnand: meson: initialize struct with zeroes Date: Mon, 3 Apr 2023 16:08:21 +0200 Message-Id: <20230403140417.280242717@linuxfoundation.org> X-Mailer: git-send-email 2.40.0 In-Reply-To: <20230403140415.090615502@linuxfoundation.org> References: <20230403140415.090615502@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: Arseniy Krasnov [ Upstream commit 4ce341de6c02d02aba7c78a6447ccfcaa9eeb328 ] This structure must be zeroed, because it's field 'hw->core' is used as 'parent' in 'clk_core_fill_parent_index()', but it will be uninitialized. This happens, because when this struct is not zeroed, pointer 'hw' is "initialized" by garbage, which is valid pointer, but points to some garbage. So 'hw' will be dereferenced, but 'core' contains some random data which will be interpreted as a pointer. The following backtrace is result of dereference of such pointer: [ 1.081319] __clk_register+0x414/0x820 [ 1.085113] devm_clk_register+0x64/0xd0 [ 1.088995] meson_nfc_probe+0x258/0x6ec [ 1.092875] platform_probe+0x70/0xf0 [ 1.096498] really_probe+0xc8/0x3e0 [ 1.100034] __driver_probe_device+0x84/0x190 [ 1.104346] driver_probe_device+0x44/0x120 [ 1.108487] __driver_attach+0xb4/0x220 [ 1.112282] bus_for_each_dev+0x78/0xd0 [ 1.116077] driver_attach+0x2c/0x40 [ 1.119613] bus_add_driver+0x184/0x240 [ 1.123408] driver_register+0x80/0x140 [ 1.127203] __platform_driver_register+0x30/0x40 [ 1.131860] meson_nfc_driver_init+0x24/0x30 Fixes: 1e4d3ba66888 ("mtd: rawnand: meson: fix the clock") Signed-off-by: Arseniy Krasnov Acked-by: Martin Blumenstingl Reviewed-by: Neil Armstrong Signed-off-by: Miquel Raynal Link: https://lore.kernel.org/linux-mtd/20230227102425.793841-1-AVKrasnov@sberdevices.ru Signed-off-by: Sasha Levin --- drivers/mtd/nand/raw/meson_nand.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/mtd/nand/raw/meson_nand.c b/drivers/mtd/nand/raw/meson_nand.c index 5ee01231ac4cd..30e326adabfc1 100644 --- a/drivers/mtd/nand/raw/meson_nand.c +++ b/drivers/mtd/nand/raw/meson_nand.c @@ -991,7 +991,7 @@ static const struct mtd_ooblayout_ops meson_ooblayout_ops = { static int meson_nfc_clk_init(struct meson_nfc *nfc) { - struct clk_parent_data nfc_divider_parent_data[1]; + struct clk_parent_data nfc_divider_parent_data[1] = {0}; struct clk_init_data init = {0}; int ret; -- 2.39.2