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=-18.8 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_CR_TRAILER,INCLUDES_PATCH,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS, USER_AGENT_GIT autolearn=ham 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 1DFA0C433E6 for ; Mon, 1 Mar 2021 20:19:36 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id D5C0A601FE for ; Mon, 1 Mar 2021 20:19:35 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S243046AbhCAURy (ORCPT ); Mon, 1 Mar 2021 15:17:54 -0500 Received: from mail.kernel.org ([198.145.29.99]:38520 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S242885AbhCAUIf (ORCPT ); Mon, 1 Mar 2021 15:08:35 -0500 Received: by mail.kernel.org (Postfix) with ESMTPSA id A324664F53; Mon, 1 Mar 2021 17:59:43 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1614621584; bh=0raTf+3i2vOiDntY2yN0VbtN1DZgN99JVpLEAr6RuJM=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=h5RgDu7Frs9UNIOg1HWBFvOeGj90Itj2G7qyNpOiBD8c8DkQuyMFF3DXxtwnILRtm wb6To5YMD1Iftg/wkEU+vWdA0541K5iH29cip8UeQn904mfi8Ni/DLv+1+q6RF5A2c HRvnFVGc3bjIc2Ux5MMzV1U6JzaHpkOl2aNQLrAE= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Michael Schmitz , Bartlomiej Zolnierkiewicz , Geert Uytterhoeven , Finn Thain , Jens Axboe , Sasha Levin Subject: [PATCH 5.11 570/775] ide/falconide: Fix module unload Date: Mon, 1 Mar 2021 17:12:18 +0100 Message-Id: <20210301161229.624615324@linuxfoundation.org> X-Mailer: git-send-email 2.30.1 In-Reply-To: <20210301161201.679371205@linuxfoundation.org> References: <20210301161201.679371205@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: stable@vger.kernel.org From: Finn Thain [ Upstream commit 07f1dc8cc85bbfb2f9270f25060c4755f4509f45 ] Unloading the falconide module results in a crash: Unable to handle kernel NULL pointer dereference at virtual address 00000000 Oops: 00000000 Modules linked in: falconide(-) PC: [<002930b2>] ide_host_remove+0x2e/0x1d2 SR: 2000 SP: 00b49e28 a2: 009b0f90 d0: 00000000 d1: 009b0f90 d2: 00000000 d3: 00b48000 d4: 003cef32 d5: 00299188 a0: 0086d000 a1: 0086d000 Process rmmod (pid: 322, task=009b0f90) Frame format=7 eff addr=00000000 ssw=0505 faddr=00000000 wb 1 stat/addr/data: 0000 00000000 00000000 wb 2 stat/addr/data: 0000 00000000 00000000 wb 3 stat/addr/data: 0000 00000000 00018da9 push data: 00000000 00000000 00000000 00000000 Stack from 00b49e90: 004c456a 0027f176 0027cb0a 0027cb9e 00000000 0086d00a 2187d3f0 0027f0e0 00b49ebc 2187d1f6 00000000 00b49ec8 002811e8 0086d000 00b49ef0 0028024c 0086d00a 002800d6 00279a1a 00000001 00000001 0086d00a 2187d3f0 00279a58 00b49f1c 002802e0 0086d00a 2187d3f0 004c456a 0086d00a ef96af74 00000000 2187d3f0 002805d2 800de064 00b49f44 0027f088 2187d3f0 00ac1cf4 2187d3f0 004c43be 2187d3f0 00000000 2187d3f0 800b66a8 00b49f5c 00280776 2187d3f0 Call Trace: [<0027f176>] __device_driver_unlock+0x0/0x48 [<0027cb0a>] device_links_busy+0x0/0x94 [<0027cb9e>] device_links_unbind_consumers+0x0/0x130 [<0027f0e0>] __device_driver_lock+0x0/0x5a [<2187d1f6>] falconide_remove+0x12/0x18 [falconide] [<002811e8>] platform_drv_remove+0x1c/0x28 [<0028024c>] device_release_driver_internal+0x176/0x17c [<002800d6>] device_release_driver_internal+0x0/0x17c [<00279a1a>] get_device+0x0/0x22 [<00279a58>] put_device+0x0/0x18 [<002802e0>] driver_detach+0x56/0x82 [<002805d2>] driver_remove_file+0x0/0x24 [<0027f088>] bus_remove_driver+0x4c/0xa4 [<00280776>] driver_unregister+0x28/0x5a [<00281a00>] platform_driver_unregister+0x12/0x18 [<2187d2a0>] ide_falcon_driver_exit+0x10/0x16 [falconide] [<000764f0>] sys_delete_module+0x110/0x1f2 [<000e83ea>] sys_rename+0x1a/0x1e [<00002e0c>] syscall+0x8/0xc [<00188004>] ext4_multi_mount_protect+0x35a/0x3ce Code: 0029 9188 4bf9 0027 aa1c 283c 003c ef32 <265c> 4a8b 6700 00b8 2043 2028 000c 0280 00ff ff00 6600 0176 40c0 7202 b2b9 004c Disabling lock debugging due to kernel taint This happens because the driver_data pointer is uninitialized. Add the missing platform_set_drvdata() call. For clarity, use the matching platform_get_drvdata() as well. Cc: Michael Schmitz Cc: Bartlomiej Zolnierkiewicz Fixes: 5ed0794cde593 ("m68k/atari: Convert Falcon IDE drivers to platform drivers") Reviewed-by: Geert Uytterhoeven Reviewed-by: Michael Schmitz Signed-off-by: Finn Thain Signed-off-by: Jens Axboe Signed-off-by: Sasha Levin --- drivers/ide/falconide.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/drivers/ide/falconide.c b/drivers/ide/falconide.c index 77af4c1a3f38c..bb86d84558d9a 100644 --- a/drivers/ide/falconide.c +++ b/drivers/ide/falconide.c @@ -164,6 +164,7 @@ static int __init falconide_init(struct platform_device *pdev) if (rc) goto err_free; + platform_set_drvdata(pdev, host); return 0; err_free: ide_host_free(host); @@ -174,7 +175,7 @@ err: static int falconide_remove(struct platform_device *pdev) { - struct ide_host *host = dev_get_drvdata(&pdev->dev); + struct ide_host *host = platform_get_drvdata(pdev); ide_host_remove(host); -- 2.27.0