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=DKIM_SIGNED,DKIM_VALID, DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH,MAILING_LIST_MULTI, SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,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 60127C8300A for ; Thu, 30 Apr 2020 09:17:03 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 355862137B for ; Thu, 30 Apr 2020 09:17:03 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=linaro.org header.i=@linaro.org header.b="VUHf05to" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726413AbgD3JRC (ORCPT ); Thu, 30 Apr 2020 05:17:02 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:40100 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-FAIL-OK-FAIL) by vger.kernel.org with ESMTP id S1726127AbgD3JRC (ORCPT ); Thu, 30 Apr 2020 05:17:02 -0400 Received: from mail-lj1-x241.google.com (mail-lj1-x241.google.com [IPv6:2a00:1450:4864:20::241]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 77970C035495 for ; Thu, 30 Apr 2020 02:17:00 -0700 (PDT) Received: by mail-lj1-x241.google.com with SMTP id u15so5705354ljd.3 for ; Thu, 30 Apr 2020 02:17:00 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linaro.org; s=google; h=from:to:cc:subject:date:message-id:in-reply-to:references :mime-version:content-transfer-encoding; bh=qAMZhL85o785efprM1NP2kmSTjnBd3DKp3TTm2/2pLw=; b=VUHf05tojt/8dBM7x8qriL+LZ5NSWiYL6ASfP0/qa6Z9WAiEfoL0VwjcYukMjohKAb IL3ataGrAGmqEvD+4NaBt2zCS/93XwBYOhc8YeP4b+2KAhUtSCWGHgcunC686tBuERjN JksemGXqBS/YkvykkQvS0KcGJ86LWPedSfqGfw8zWHtGAkLRMhkhr2GGLkz3YzbEtzVw /RNA47eQ6QSFWQVl0WCRRZHBN5EHtQcn4P3YphuQjrDURAjexH30bXSaiy1wluST12zj QX9GIE3S1R+B5Te/YJFb4HrtTuurnNQP8SJUQi6y8lyZRv1o6N9eqE6uXTpPgXCxIULc 8reg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references:mime-version:content-transfer-encoding; bh=qAMZhL85o785efprM1NP2kmSTjnBd3DKp3TTm2/2pLw=; b=SqR8//SlTHcedle9M+o2x+u/7dsTbneiM4GXHzVrFEiTdFV/vEn5e6YJsA4VzOBx0X Q5zESu9GSYG8t5GN6oZq02gvsLcPI+g7LXMMG2fMuIkOOCigORz92mXghrjDWbCUotHs TpbYZOV+CjudbIz/mD5T+o2O4IT4qr6Qck4C09S46B6xJbWwqE6b5xSu220OdxPA/psG MIgcB3c8k9rnWRPPQxVOqriVdXft3Jz1g+MpauwyGBQm1pc+UZlkWCf6giNAwbYqVd29 xbOYh/eu1tmeav07lZlOMw3PNElkkDy117DsfkYCO4cojad8yh7MQozkr/BfjYorqoaU i3Kg== X-Gm-Message-State: AGi0PuaLDlZgFp/VxzWOFZvubsLgroBP2h1FiOdwO/gsZJo5hnuARaQd iie8qxrPpqFAzvheWKGy8cpTOJ5pvy8= X-Google-Smtp-Source: APiQypL+uEyUbsga+hXMGToa54CpmX3+zYfupgtWwqH5J1W083jmsUWfJ/eXZguHDsGCrMriqPsXAg== X-Received: by 2002:a2e:9948:: with SMTP id r8mr1637670ljj.1.1588238218547; Thu, 30 Apr 2020 02:16:58 -0700 (PDT) Received: from localhost.localdomain (h-98-128-181-7.NA.cust.bahnhof.se. [98.128.181.7]) by smtp.gmail.com with ESMTPSA id x29sm4417818lfn.64.2020.04.30.02.16.57 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 30 Apr 2020 02:16:57 -0700 (PDT) From: Ulf Hansson To: linux-mmc@vger.kernel.org, Ulf Hansson Cc: Adrian Hunter , Douglas Anderson , Matthias Kaehlcke , Shawn Lin , Yong Mao , Chaotian Jing , stable@vger.kernel.org Subject: [PATCH 1/4] mmc: sdio: Fix potential NULL pointer error in mmc_sdio_init_card() Date: Thu, 30 Apr 2020 11:16:37 +0200 Message-Id: <20200430091640.455-2-ulf.hansson@linaro.org> X-Mailer: git-send-email 2.20.1 In-Reply-To: <20200430091640.455-1-ulf.hansson@linaro.org> References: <20200430091640.455-1-ulf.hansson@linaro.org> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Sender: linux-mmc-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-mmc@vger.kernel.org During some scenarios mmc_sdio_init_card() runs a retry path for the UHS-I specific initialization, which leads to removal of the previously allocated card. A new card is then re-allocated while retrying. However, in one of the corresponding error paths we may end up to remove an already removed card, which likely leads to a NULL pointer exception. So, let's fix this. Fixes: 5fc3d80ef496 ("mmc: sdio: don't use rocr to check if the card could support UHS mode") Cc: Signed-off-by: Ulf Hansson --- drivers/mmc/core/sdio.c | 3 +-- 1 file changed, 1 insertion(+), 2 deletions(-) diff --git a/drivers/mmc/core/sdio.c b/drivers/mmc/core/sdio.c index ebb387aa5158..d35679e6e6aa 100644 --- a/drivers/mmc/core/sdio.c +++ b/drivers/mmc/core/sdio.c @@ -718,9 +718,8 @@ static int mmc_sdio_init_card(struct mmc_host *host, u32 ocr, /* Retry init sequence, but without R4_18V_PRESENT. */ retries = 0; goto try_again; - } else { - goto remove; } + return err; } /* -- 2.20.1