From f6d8baf1b1971f5cb75baffa401c7ccc37d3959e Mon Sep 17 00:00:00 2001 From: Desnes Nunes Date: Wed, 19 Mar 2025 15:50:38 -0300 Subject: [PATCH] USB: make to_usb_device_driver() use container_of_const() JIRA: https://issues.redhat.com/browse/RHEL-78828 Conflicts: * Avoiding commit ("driver core: have match() callback in struct bus_type take a const *") commit d6fa15bbcf9604e3c14816410550d2cf22b955e4 Author: Greg Kroah-Hartman Date: Wed, 13 Nov 2024 15:04:41 +0100 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 Link: https://lore.kernel.org/r/2024111342-lagoon-reapprove-5e49@gregkh Signed-off-by: Greg Kroah-Hartman Signed-off-by: Desnes Nunes --- 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 b81b8f7ac371..dc091819e427 100644 --- a/drivers/usb/core/driver.c +++ b/drivers/usb/core/driver.c @@ -850,7 +850,7 @@ 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 && @@ -870,7 +870,7 @@ static int usb_device_match(struct device *dev, 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 2746c3831d45..9728819dfe03 100644 --- a/include/linux/usb.h +++ b/include/linux/usb.h @@ -1294,8 +1294,7 @@ 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