From patchwork Fri Jun 14 12:11:50 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Greg KH X-Patchwork-Id: 804488 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 0827E192B98; Fri, 14 Jun 2024 12:11:56 +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=1718367117; cv=none; b=tXVD/7zdXPt1qreZyZV+yfTVSroF0ZDzqv6cMVUPN1WLErRUMvMRYD5C+R6Q31BAf+69zaM1dd8+UdLuxJM1BumAErbQBuBtiZLEBYB1n/zw+R6Iz8CW3WAMIjliafSCpKYkrL5YPvCbl6R/bRMOxphmkpLqqvxbY+f3wznlCtU= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1718367117; c=relaxed/simple; bh=aWCY1aJm0OUGDkP3er9YqI5eYDuhfcLrTmx6H7rZDmk=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=YFzPycnDCUTQSjgd/HF9/hyliC1k+8dUo77q/4Q8IyZ1ncQr1Y6kwxtHTvA4MpNav2VztEHV6s3JCHHDrtvlj0Afb0mve3dRejXFm3ybpIDY7DEuwAlgcafnxhO+014I9OaI9rGcUI1a7CkdwwWaLiK6SWi4TGqIEeThFooZKbo= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=segs75tm; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b="segs75tm" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 4821EC2BD10; Fri, 14 Jun 2024 12:11:56 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1718367116; bh=aWCY1aJm0OUGDkP3er9YqI5eYDuhfcLrTmx6H7rZDmk=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=segs75tmF9EF+LZW2AFx0a9S+eT01AUO3Z+ErLo2XbWAag8FvWZEeN4a5FpyzHbMH BXfYDQ8l1jntuMlg4X+23878dMlpDuh9ApmU0llX/NUvLefKCAkvHMBzsR+kcLij4E 5yDRqEqJpI3pi+EE4nYHldNHHh7RNJ3dTnOczpzk= From: Greg Kroah-Hartman To: linux-usb@vger.kernel.org Cc: linux-kernel@vger.kernel.org, Greg Kroah-Hartman , Johan Hovold , Alan Stern , Grant Grundler , Yajun Deng , Oliver Neukum , Douglas Anderson Subject: [PATCH 2/4] USB: make to_usb_device_driver() use container_of_const() Date: Fri, 14 Jun 2024 14:11:50 +0200 Message-ID: <2024061451-deviator-scabbed-2131@gregkh> X-Mailer: git-send-email 2.45.2 In-Reply-To: <2024061448-manly-universal-00ad@gregkh> References: <2024061448-manly-universal-00ad@gregkh> Precedence: bulk X-Mailing-List: linux-usb@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Developer-Signature: v=1; a=openpgp-sha256; l=3081; i=gregkh@linuxfoundation.org; h=from:subject:message-id; bh=aWCY1aJm0OUGDkP3er9YqI5eYDuhfcLrTmx6H7rZDmk=; b=owGbwMvMwCRo6H6F97bub03G02pJDGk5xu13V/+JfWdVM39B6YH57j5+pevlzsj+//N+Xdb1G Wd9PxWs64hlYRBkYpAVU2T5so3n6P6KQ4pehranYeawMoEMYeDiFICJVPxhmKco9/hL0CXH80f5 +UMFxJbd/jp1x1uGOZzfiiZ9m8W+mn9Sx3PGJrtdxo8ufwAA X-Developer-Key: i=gregkh@linuxfoundation.org; a=openpgp; fpr=F4B60CC5BF78C2214A313DCB3147D40DDB2DFB29 Turns out that we have some const pointers being passed to to_usb_device_driver() but were not catching this. Change the macro to properly propagate the const-ness of the pointer so that we will notice when we try to write to memory that we shouldn't be writing to. This requires fixing up the usb_driver_applicable() function as well, because it can handle a const * to struct usb_driver. Cc: Johan Hovold Cc: Alan Stern Cc: Grant Grundler Cc: Yajun Deng Cc: Oliver Neukum Cc: Douglas Anderson Cc: linux-usb@vger.kernel.org Signed-off-by: Greg Kroah-Hartman --- drivers/usb/core/driver.c | 4 ++-- drivers/usb/core/usb.h | 2 +- include/linux/usb.h | 3 +-- 3 files changed, 4 insertions(+), 5 deletions(-) diff --git a/drivers/usb/core/driver.c b/drivers/usb/core/driver.c index c985a272e552..d0fb2f315d65 100644 --- a/drivers/usb/core/driver.c +++ b/drivers/usb/core/driver.c @@ -840,7 +840,7 @@ const struct usb_device_id *usb_device_match_id(struct usb_device *udev, EXPORT_SYMBOL_GPL(usb_device_match_id); bool usb_driver_applicable(struct usb_device *udev, - struct usb_device_driver *udrv) + const struct usb_device_driver *udrv) { if (udrv->id_table && udrv->match) return usb_device_match_id(udev, udrv->id_table) != NULL && @@ -860,7 +860,7 @@ static int usb_device_match(struct device *dev, const struct device_driver *drv) /* devices and interfaces are handled separately */ if (is_usb_device(dev)) { struct usb_device *udev; - struct usb_device_driver *udrv; + const struct usb_device_driver *udrv; /* interface drivers never match devices */ if (!is_usb_device_driver(drv)) diff --git a/drivers/usb/core/usb.h b/drivers/usb/core/usb.h index b8324ea05b20..a9b37aeb515b 100644 --- a/drivers/usb/core/usb.h +++ b/drivers/usb/core/usb.h @@ -75,7 +75,7 @@ extern int usb_match_device(struct usb_device *dev, extern const struct usb_device_id *usb_device_match_id(struct usb_device *udev, const struct usb_device_id *id); extern bool usb_driver_applicable(struct usb_device *udev, - struct usb_device_driver *udrv); + const struct usb_device_driver *udrv); extern void usb_forced_unbind_intf(struct usb_interface *intf); extern void usb_unbind_and_rebind_marked_interfaces(struct usb_device *udev); diff --git a/include/linux/usb.h b/include/linux/usb.h index 4390426973f4..5c619e8240fe 100644 --- a/include/linux/usb.h +++ b/include/linux/usb.h @@ -1283,8 +1283,7 @@ struct usb_device_driver { unsigned int supports_autosuspend:1; unsigned int generic_subclass:1; }; -#define to_usb_device_driver(d) container_of(d, struct usb_device_driver, \ - driver) +#define to_usb_device_driver(d) container_of_const(d, struct usb_device_driver, driver) /** * struct usb_class_driver - identifies a USB driver that wants to use the USB major number