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0d60d8df6f
This fixes a possible UAF in if_nlmsg_size(),
which can run without RTNL.
Add rcu protection to "struct dpll_pin"
Move netdev_dpll_pin() from netdevice.h to dpll.h to
decrease name pollution.
Note: This looks possible to no longer acquire RTNL in
netdev_dpll_pin_assign() later in net-next.
v2: do not force rcu_read_lock() in rtnl_dpll_pin_size() (Jiri Pirko)
Fixes: 5f18426928 ("netdev: expose DPLL pin handle for netdevice")
Signed-off-by: Eric Dumazet <edumazet@google.com>
Cc: Arkadiusz Kubalewski <arkadiusz.kubalewski@intel.com>
Cc: Vadim Fedorenko <vadim.fedorenko@linux.dev>
Reviewed-by: Jiri Pirko <jiri@nvidia.com>
Link: https://lore.kernel.org/r/20240223123208.3543319-1-edumazet@google.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
92 lines
2.6 KiB
C
92 lines
2.6 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
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/*
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* Copyright (c) 2023 Meta Platforms, Inc. and affiliates
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* Copyright (c) 2023 Intel and affiliates
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*/
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#ifndef __DPLL_CORE_H__
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#define __DPLL_CORE_H__
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#include <linux/dpll.h>
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#include <linux/list.h>
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#include <linux/refcount.h>
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#include "dpll_nl.h"
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#define DPLL_REGISTERED XA_MARK_1
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/**
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* struct dpll_device - stores DPLL device internal data
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* @id: unique id number for device given by dpll subsystem
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* @device_idx: id given by dev driver
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* @clock_id: unique identifier (clock_id) of a dpll
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* @module: module of creator
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* @type: type of a dpll
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* @pin_refs: stores pins registered within a dpll
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* @refcount: refcount
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* @registration_list: list of registered ops and priv data of dpll owners
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**/
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struct dpll_device {
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u32 id;
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u32 device_idx;
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u64 clock_id;
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struct module *module;
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enum dpll_type type;
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struct xarray pin_refs;
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refcount_t refcount;
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struct list_head registration_list;
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};
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/**
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* struct dpll_pin - structure for a dpll pin
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* @id: unique id number for pin given by dpll subsystem
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* @pin_idx: index of a pin given by dev driver
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* @clock_id: clock_id of creator
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* @module: module of creator
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* @dpll_refs: hold referencees to dplls pin was registered with
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* @parent_refs: hold references to parent pins pin was registered with
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* @prop: pin properties copied from the registerer
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* @rclk_dev_name: holds name of device when pin can recover clock from it
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* @refcount: refcount
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* @rcu: rcu_head for kfree_rcu()
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**/
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struct dpll_pin {
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u32 id;
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u32 pin_idx;
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u64 clock_id;
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struct module *module;
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struct xarray dpll_refs;
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struct xarray parent_refs;
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struct dpll_pin_properties prop;
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refcount_t refcount;
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struct rcu_head rcu;
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};
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/**
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* struct dpll_pin_ref - structure for referencing either dpll or pins
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* @dpll: pointer to a dpll
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* @pin: pointer to a pin
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* @registration_list: list of ops and priv data registered with the ref
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* @refcount: refcount
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**/
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struct dpll_pin_ref {
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union {
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struct dpll_device *dpll;
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struct dpll_pin *pin;
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};
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struct list_head registration_list;
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refcount_t refcount;
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};
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void *dpll_priv(struct dpll_device *dpll);
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void *dpll_pin_on_dpll_priv(struct dpll_device *dpll, struct dpll_pin *pin);
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void *dpll_pin_on_pin_priv(struct dpll_pin *parent, struct dpll_pin *pin);
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const struct dpll_device_ops *dpll_device_ops(struct dpll_device *dpll);
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struct dpll_device *dpll_device_get_by_id(int id);
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const struct dpll_pin_ops *dpll_pin_ops(struct dpll_pin_ref *ref);
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struct dpll_pin_ref *dpll_xa_ref_dpll_first(struct xarray *xa_refs);
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extern struct xarray dpll_device_xa;
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extern struct xarray dpll_pin_xa;
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extern struct mutex dpll_lock;
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#endif
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