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 E8958C352A8 for ; Mon, 7 Feb 2022 11:14:00 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1356060AbiBGLMw (ORCPT ); Mon, 7 Feb 2022 06:12:52 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:48576 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S245176AbiBGLJg (ORCPT ); Mon, 7 Feb 2022 06:09:36 -0500 Received: from dfw.source.kernel.org (dfw.source.kernel.org [139.178.84.217]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 2942AC043181; Mon, 7 Feb 2022 03:09:35 -0800 (PST) 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 68AD4611AA; Mon, 7 Feb 2022 11:09:35 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 35E54C004E1; Mon, 7 Feb 2022 11:09:34 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1644232174; bh=PxCjQB59AFOjGkXG7BsiizVDI2hZ6Ml5PksMKyStTcY=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=gPUJlPf5pOxCcQKWMMj9gSwXxdrV3ZOwEameuT4o8pUcnGic5W5VWsZBey7AO7/Ic VhSuOinLPZsUY1USxIhBMcL11i6fpUF0rwKs27qYC8F7VuYeGDAccw2UaGzljXoLkG Sk4DMBweJLeJyn+LxhUjKVAdPcz9hXcmTYXVC3Ug= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Benjamin Gaignard , Mark Brown Subject: [PATCH 4.9 39/48] spi: mediatek: Avoid NULL pointer crash in interrupt Date: Mon, 7 Feb 2022 12:06:12 +0100 Message-Id: <20220207103753.607222671@linuxfoundation.org> X-Mailer: git-send-email 2.35.1 In-Reply-To: <20220207103752.341184175@linuxfoundation.org> References: <20220207103752.341184175@linuxfoundation.org> User-Agent: quilt/0.66 MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Benjamin Gaignard commit f83a96e5f033fbbd21764705cb9c04234b96218e upstream. In some case, like after a transfer timeout, master->cur_msg pointer is NULL which led to a kernel crash when trying to use master->cur_msg->spi. mtk_spi_can_dma(), pointed by master->can_dma, doesn't use this parameter avoid the problem by setting NULL as second parameter. Fixes: a568231f46322 ("spi: mediatek: Add spi bus for Mediatek MT8173") Signed-off-by: Benjamin Gaignard Link: https://lore.kernel.org/r/20220131141708.888710-1-benjamin.gaignard@collabora.com Signed-off-by: Mark Brown Signed-off-by: Greg Kroah-Hartman --- drivers/spi/spi-mt65xx.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) --- a/drivers/spi/spi-mt65xx.c +++ b/drivers/spi/spi-mt65xx.c @@ -440,7 +440,7 @@ static irqreturn_t mtk_spi_interrupt(int else mdata->state = MTK_SPI_IDLE; - if (!master->can_dma(master, master->cur_msg->spi, trans)) { + if (!master->can_dma(master, NULL, trans)) { if (trans->rx_buf) { cnt = mdata->xfer_len / 4; ioread32_rep(mdata->base + SPI_RX_DATA_REG,