From 506ada89629ec7059b96ecfb0dc7d33ece0103ca Mon Sep 17 00:00:00 2001 From: Eduard Zingerman Date: Fri, 4 Sep 2026 17:05:56 -0700 Subject: bpf: mark a NULL kfunc argument precise check_kfunc_arg() allows bpf_register_is_null() for nullable arguments w/o marking the underlying scalar register precise. Hence a checkpoint created on such a path would prune against arbitrary scalar value. Fixes: 3bda08b63670 ("bpf: Allow NULL buffers in bpf_dynptr_slice(_rw)") Signed-off-by: Eduard Zingerman Link: https://lore.kernel.org/r/20260904-register-is-null-precise-fixes-v1-5-0f5a360ff15d@gmail.com Signed-off-by: Alexei Starovoitov --- net/batman-adv/hard-interface.h | 149 ++++++++++++++++++++++++++++++++++++++++ 1 file changed, 149 insertions(+) create mode 100644 net/batman-adv/hard-interface.h (limited to 'net/batman-adv/hard-interface.h') diff --git a/net/batman-adv/hard-interface.h b/net/batman-adv/hard-interface.h new file mode 100644 index 000000000..935f47ca9 --- /dev/null +++ b/net/batman-adv/hard-interface.h @@ -0,0 +1,149 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +/* Copyright (C) B.A.T.M.A.N. contributors: + * + * Marek Lindner, Simon Wunderlich + */ + +#ifndef _NET_BATMAN_ADV_HARD_INTERFACE_H_ +#define _NET_BATMAN_ADV_HARD_INTERFACE_H_ + +#include "main.h" + +#include +#include +#include +#include +#include +#include +#include + +/** + * enum batadv_hard_if_state - State of a hard interface + */ +enum batadv_hard_if_state { + /** + * @BATADV_IF_TO_BE_REMOVED: interface will be removed from mesh + * interface + */ + BATADV_IF_TO_BE_REMOVED, + + /** @BATADV_IF_INACTIVE: interface is deactivated */ + BATADV_IF_INACTIVE, + + /** @BATADV_IF_ACTIVE: interface is used */ + BATADV_IF_ACTIVE, + + /** @BATADV_IF_TO_BE_ACTIVATED: interface is getting activated */ + BATADV_IF_TO_BE_ACTIVATED, +}; + +/** + * enum batadv_hard_if_bcast - broadcast avoidance options + */ +enum batadv_hard_if_bcast { + /** @BATADV_HARDIF_BCAST_OK: Do broadcast on according hard interface */ + BATADV_HARDIF_BCAST_OK = 0, + + /** + * @BATADV_HARDIF_BCAST_NORECIPIENT: Broadcast not needed, there is no + * recipient + */ + BATADV_HARDIF_BCAST_NORECIPIENT, + + /** + * @BATADV_HARDIF_BCAST_DUPFWD: There is just the neighbor we got it + * from + */ + BATADV_HARDIF_BCAST_DUPFWD, + + /** @BATADV_HARDIF_BCAST_DUPORIG: There is just the originator */ + BATADV_HARDIF_BCAST_DUPORIG, +}; + +extern struct notifier_block batadv_hard_if_notifier; + +struct net_device *__batadv_get_real_netdev(struct net_device *net_device); +struct net_device *batadv_get_real_netdev(struct net_device *net_device); +u32 batadv_netdev_get_wifi_flags(struct net_device *net_dev); +u32 batadv_hardif_get_wifi_flags(struct batadv_hard_iface *hard_iface); +bool batadv_is_wifi_hardif(struct batadv_hard_iface *hard_iface); +struct batadv_hard_iface* +batadv_hardif_get_by_netdev(struct net_device *net_dev); +int batadv_hardif_enable_interface(struct net_device *net_dev, + struct net_device *mesh_iface); +void batadv_hardif_disable_interface(struct batadv_hard_iface *hard_iface); +int batadv_hardif_min_mtu(struct net_device *mesh_iface); +void batadv_update_min_mtu(struct net_device *mesh_iface); +void batadv_hardif_release(struct kref *ref); +int batadv_hardif_no_broadcast(struct batadv_hard_iface *if_outgoing, + u8 *orig_addr, u8 *orig_neigh); +int __init batadv_wifi_net_devices_init(void); +void batadv_wifi_net_devices_deinit(void); + +/** + * batadv_hardif_put() - decrement the hard interface refcounter and possibly + * release it + * @hard_iface: the hard interface to free + */ +static inline void batadv_hardif_put(struct batadv_hard_iface *hard_iface) +{ + if (!hard_iface) + return; + + kref_put(&hard_iface->refcount, batadv_hardif_release); +} + +/** + * batadv_primary_if_get_selected() - Get reference to primary interface + * @bat_priv: the bat priv with all the mesh interface information + * + * Return: primary interface (with increased refcnt), otherwise NULL + */ +static inline struct batadv_hard_iface * +batadv_primary_if_get_selected(struct batadv_priv *bat_priv) +{ + struct batadv_hard_iface *hard_iface; + + rcu_read_lock(); + hard_iface = rcu_dereference(bat_priv->primary_if); + if (!hard_iface) + goto out; + + if (!kref_get_unless_zero(&hard_iface->refcount)) + hard_iface = NULL; + +out: + rcu_read_unlock(); + return hard_iface; +} + +/** + * batadv_is_cfg80211() - check if the given hardif is a cfg80211 + * wifi interface + * @wifi_flags: extracted batadv_hard_iface_wifi_flags of a net_device + * + * Return: true if the net device is a cfg80211 wireless device, false + * otherwise. + */ +static inline bool batadv_is_cfg80211(u32 wifi_flags) +{ + u32 allowed_flags = 0; + + allowed_flags |= BATADV_HARDIF_WIFI_CFG80211_DIRECT; + allowed_flags |= BATADV_HARDIF_WIFI_CFG80211_INDIRECT; + + return !!(wifi_flags & allowed_flags); +} + +/** + * batadv_is_wifi() - check if flags belong to wifi interface + * @wifi_flags: extracted batadv_hard_iface_wifi_flags of a net_device + * + * Return: true if the net device is a 802.11 wireless device, false otherwise. + */ +static inline bool batadv_is_wifi(u32 wifi_flags) +{ + return wifi_flags != 0; +} + +#endif /* _NET_BATMAN_ADV_HARD_INTERFACE_H_ */ -- cgit v1.3.1