From 4617721c502b2ddaa4e324e86da4997edf738fa5 Mon Sep 17 00:00:00 2001 From: Steven Rostedt Date: Wed, 2 Sep 2026 09:55:01 -0400 Subject: ftrace: Synchronize the initialization of ftrace_ops There's some internal state that ftrace_ops needs to have set, but since it can be declared outside of the ftrace.c code, it calls ftrace_ops_init() on the ops in every global function. The issue is that if two tasks call it on the same ops at the same time it is possible to have the initialization of one corrupt the initialization of the other call. Create a ops_mutex to use to synchronize every initialization of the ftrace_ops. The mutex is taken within checking the ftrace_ops flag that states it was initializied but the flag is checked again after the mutex has been taken. Checking first outside the mutex allows it to shortcut having to take the mutex. But then the check needs to be done again after the mute is taken in case of races. Cc: stable@vger.kernel.org Link: https://patch.msgid.link/20260902095501.6b59af20@gandalf.local.home Fixes: f04f24fb7e48d ("ftrace, kprobes: Fix a deadlock on ftrace_regex_lock") Reported-by: sashiko-bot@kernel.org Close: https://lore.kernel.org/all/20260829025528.49A831F000E9@smtp.kernel.org/ Signed-off-by: Steven Rostedt --- drivers/net/wireguard/device.h | 62 ++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 62 insertions(+) create mode 100644 drivers/net/wireguard/device.h (limited to 'drivers/net/wireguard/device.h') diff --git a/drivers/net/wireguard/device.h b/drivers/net/wireguard/device.h new file mode 100644 index 000000000..43c7cebbf --- /dev/null +++ b/drivers/net/wireguard/device.h @@ -0,0 +1,62 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +/* + * Copyright (C) 2015-2019 Jason A. Donenfeld . All Rights Reserved. + */ + +#ifndef _WG_DEVICE_H +#define _WG_DEVICE_H + +#include "noise.h" +#include "allowedips.h" +#include "peerlookup.h" +#include "cookie.h" + +#include +#include +#include +#include +#include +#include + +struct wg_device; + +struct multicore_worker { + void *ptr; + struct work_struct work; +}; + +struct crypt_queue { + struct ptr_ring ring; + struct multicore_worker __percpu *worker; + int last_cpu; +}; + +struct prev_queue { + struct sk_buff *head, *tail, *peeked; + struct { struct sk_buff *next, *prev; } empty; // Match first 2 members of struct sk_buff. + atomic_t count; +}; + +struct wg_device { + struct net_device *dev; + struct crypt_queue encrypt_queue, decrypt_queue, handshake_queue; + struct sock __rcu *sock4, *sock6; + struct net __rcu *creating_net; + struct noise_static_identity static_identity; + struct workqueue_struct *packet_crypt_wq,*handshake_receive_wq, *handshake_send_wq; + struct cookie_checker cookie_checker; + struct pubkey_hashtable *peer_hashtable; + struct index_hashtable *index_hashtable; + struct allowedips peer_allowedips; + struct mutex device_update_lock, socket_update_lock; + struct list_head device_list, peer_list; + atomic_t handshake_queue_len; + unsigned int num_peers, device_update_gen; + u32 fwmark; + u16 incoming_port; +}; + +int wg_device_init(void); +void wg_device_uninit(void); + +#endif /* _WG_DEVICE_H */ -- cgit v1.3.1