From patchwork Mon Nov 11 17:48:30 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Manivannan Sadhasivam via B4 Relay X-Patchwork-Id: 842827 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 877F31A42C4; Mon, 11 Nov 2024 17:48:38 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1731347318; cv=none; b=djBO0gfW8UcUOZBLBpkTbzEGySxiYBrqGn1zkNqeDTWyIUTGp1gPAP87VZh1xnAqK0K+jv8iNE2KWIrWpDKkWKWj2CfLbJN9EecqER5eUCK1yxumz+enfsSk75SZXYtJziE6Aa+fo4B9AoL6fzlyIzDcZLgovJbFUmg2GtMrYk0= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1731347318; c=relaxed/simple; bh=G69FHYexPwpw/irD51I+oJah3BCb6iFaLGhHwlC23Sc=; h=From:Date:Subject:MIME-Version:Content-Type:Message-Id:References: In-Reply-To:To:Cc; b=kYgBrTiAVMRd1S1Cr9K/4VBEWy5AL1e/L7FhxAB0qKCMlBB2UPMwbvqz/8ZjpZpcZ6GTFvUSOYBqD5u+y/ru5f/GxcHD9GyOpP+b//n5nQe0Clfs4CUNjDG8dHIYYo+dHrzbju8oUIdOx6ei81c+Wc6Mh7FbU2SlW21p7IAXOws= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=C0C9bmDU; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="C0C9bmDU" Received: by smtp.kernel.org (Postfix) with ESMTPS id 28C54C4CED5; Mon, 11 Nov 2024 17:48:38 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1731347318; bh=G69FHYexPwpw/irD51I+oJah3BCb6iFaLGhHwlC23Sc=; h=From:Date:Subject:References:In-Reply-To:To:Cc:Reply-To:From; b=C0C9bmDUJRRt3wJShhZ/CieKiCh5u0nABPCkvnDz8pS8l+fmwfewTXgapxgC5xugY ZdOeu2hOBqVt/SQ57N8KR68elYetPbhdOvFDNOTlSVwXKPz+Z1TZiIM6BpINDMp3Sb 6CTgY+7UkK2o7yYOpahHvnyPF7eUNuACqUStjDsnYCzLl+VxoySmVeOhv23/MzMgkL fHFL6VDhNIQGjbdARxv4//iGhgeTtJ2KiAQNVbZnY4/a7mWoxy4BlQamWmzJAO5+qb 0QlXzFvU3ioPxVKSIrpJ/0Xp+uoJJLgxcpAwCgOzlfcdRLo0GlvV3en2rM5z4R1mvy sjcOmwxV41YUA== Received: from aws-us-west-2-korg-lkml-1.web.codeaurora.org (localhost.localdomain [127.0.0.1]) by smtp.lore.kernel.org (Postfix) with ESMTP id 17CA0D3ABD8; Mon, 11 Nov 2024 17:48:38 +0000 (UTC) From: Manivannan Sadhasivam via B4 Relay Date: Mon, 11 Nov 2024 23:18:30 +0530 Subject: [PATCH 1/5] scsi: ufs: core: Cancel RTC work during ufshcd_remove() Precedence: bulk X-Mailing-List: linux-samsung-soc@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Message-Id: <20241111-ufs_bug_fix-v1-1-45ad8b62f02e@linaro.org> References: <20241111-ufs_bug_fix-v1-0-45ad8b62f02e@linaro.org> In-Reply-To: <20241111-ufs_bug_fix-v1-0-45ad8b62f02e@linaro.org> To: Alim Akhtar , Avri Altman , Bart Van Assche , "James E.J. Bottomley" , "Martin K. Petersen" , Mike Bi , Bean Huo , =?utf-8?q?Thom?= =?utf-8?q?as_Wei=C3=9Fschuh?= , Luca Porzio , Asutosh Das , Can Guo , Pedro Sousa , Krzysztof Kozlowski , Peter Wang , Stanley Jhu , Yoshihiro Shimoda , Orson Zhai , Baolin Wang , Chunyan Zhang , Matthias Brugger , AngeloGioacchino Del Regno , Santosh Y , Namjae Jeon Cc: linux-scsi@vger.kernel.org, linux-kernel@vger.kernel.org, linux-arm-msm@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-samsung-soc@vger.kernel.org, linux-mediatek@lists.infradead.org, linux-renesas-soc@vger.kernel.org, Manivannan Sadhasivam , stable@vger.kernel.org X-Mailer: b4 0.14.1 X-Developer-Signature: v=1; a=openpgp-sha256; l=1553; i=manivannan.sadhasivam@linaro.org; h=from:subject:message-id; bh=DVIcv3/NWxzqjqTgGie8L2Gx0Ep0Cnv9hngTv71tWI8=; b=owEBbQGS/pANAwAKAVWfEeb+kc71AcsmYgBnMkNyuWNNeuyqHW6wHJWBMDDSw07Unxl6usmOR ufHW4bxRbuJATMEAAEKAB0WIQRnpUMqgUjL2KRYJ5dVnxHm/pHO9QUCZzJDcgAKCRBVnxHm/pHO 9T95CACMdtOCvpWHJK1lxW2m+V6GbLEuNbAD0lZ2wBw1SXofplwVCWGJdvi40XW/5/caHDa4p3V 8cl5LFsw29z6p0n6ZwMC4Fl2nQjs3S8M+frDwLyelMKBvzuuhqIKf1bp8oJZC8e8q7I3i/+hBbc g0a3GvGZaTFNACN7v88ROg0J9CvhylTTeAWC5gTWLOF/dIr+6AUP+8VTPa9v+zTeGaCibMJvN0e P632FxzWqbrUCP6X/NUCeptORHwrSlkmUtMK3pLku6vxzQRpDtM1l/S4o8ktUdVsglUmtXnzCNW Ix2pNkxM4jEkVNJqrZ9ceWl40kPLs2qa2Tg09M7wbBDHLane X-Developer-Key: i=manivannan.sadhasivam@linaro.org; a=openpgp; fpr=C668AEC3C3188E4C611465E7488550E901166008 X-Endpoint-Received: by B4 Relay for manivannan.sadhasivam@linaro.org/default with auth_id=185 X-Original-From: Manivannan Sadhasivam Reply-To: manivannan.sadhasivam@linaro.org From: Manivannan Sadhasivam Currently, RTC work is only cancelled during __ufshcd_wl_suspend(). When ufshcd is removed in ufshcd_remove(), RTC work is not cancelled. Due to this, any further trigger of the RTC work after ufshcd_remove() would result in a NULL pointer dereference as below: Unable to handle kernel NULL pointer dereference at virtual address 00000000000002a4 Workqueue: events ufshcd_rtc_work Call trace: _raw_spin_lock_irqsave+0x34/0x8c pm_runtime_get_if_active+0x24/0xb4 ufshcd_rtc_work+0x124/0x19c process_scheduled_works+0x18c/0x2d8 worker_thread+0x144/0x280 kthread+0x11c/0x128 ret_from_fork+0x10/0x20 Since RTC work accesses the ufshcd internal structures, it should be cancelled when ufshcd is removed. So do that in ufshcd_remove(), as per the order in ufshcd_init(). Cc: stable@vger.kernel.org # 6.8 Fixes: 6bf999e0eb41 ("scsi: ufs: core: Add UFS RTC support") Signed-off-by: Manivannan Sadhasivam Reviewed-by: Bean Huo --- drivers/ufs/core/ufshcd.c | 1 + 1 file changed, 1 insertion(+) diff --git a/drivers/ufs/core/ufshcd.c b/drivers/ufs/core/ufshcd.c index f5846598d80e..cc2555333512 100644 --- a/drivers/ufs/core/ufshcd.c +++ b/drivers/ufs/core/ufshcd.c @@ -10225,6 +10225,7 @@ void ufshcd_remove(struct ufs_hba *hba) ufs_hwmon_remove(hba); ufs_bsg_remove(hba); ufs_sysfs_remove_nodes(hba->dev); + cancel_delayed_work_sync(&hba->ufs_rtc_update_work); blk_mq_destroy_queue(hba->tmf_queue); blk_put_queue(hba->tmf_queue); blk_mq_free_tag_set(&hba->tmf_tag_set);