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 --- drivers/net/wireguard/cookie.h | 59 ++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 59 insertions(+) create mode 100644 drivers/net/wireguard/cookie.h (limited to 'drivers/net/wireguard/cookie.h') diff --git a/drivers/net/wireguard/cookie.h b/drivers/net/wireguard/cookie.h new file mode 100644 index 000000000..c4bd61ca0 --- /dev/null +++ b/drivers/net/wireguard/cookie.h @@ -0,0 +1,59 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +/* + * Copyright (C) 2015-2019 Jason A. Donenfeld . All Rights Reserved. + */ + +#ifndef _WG_COOKIE_H +#define _WG_COOKIE_H + +#include "messages.h" +#include + +struct wg_peer; + +struct cookie_checker { + u8 secret[NOISE_HASH_LEN]; + u8 cookie_encryption_key[NOISE_SYMMETRIC_KEY_LEN]; + u8 message_mac1_key[NOISE_SYMMETRIC_KEY_LEN]; + u64 secret_birthdate; + struct rw_semaphore secret_lock; + struct wg_device *device; +}; + +struct cookie { + u64 birthdate; + bool is_valid; + u8 cookie[COOKIE_LEN]; + bool have_sent_mac1; + u8 last_mac1_sent[COOKIE_LEN]; + u8 cookie_decryption_key[NOISE_SYMMETRIC_KEY_LEN]; + u8 message_mac1_key[NOISE_SYMMETRIC_KEY_LEN]; + struct rw_semaphore lock; +}; + +enum cookie_mac_state { + INVALID_MAC, + VALID_MAC_BUT_NO_COOKIE, + VALID_MAC_WITH_COOKIE_BUT_RATELIMITED, + VALID_MAC_WITH_COOKIE +}; + +void wg_cookie_checker_init(struct cookie_checker *checker, + struct wg_device *wg); +void wg_cookie_checker_precompute_device_keys(struct cookie_checker *checker); +void wg_cookie_checker_precompute_peer_keys(struct wg_peer *peer); +void wg_cookie_init(struct cookie *cookie); + +enum cookie_mac_state wg_cookie_validate_packet(struct cookie_checker *checker, + struct sk_buff *skb, + bool check_cookie); +void wg_cookie_add_mac_to_packet(void *message, size_t len, + struct wg_peer *peer); + +void wg_cookie_message_create(struct message_handshake_cookie *src, + struct sk_buff *skb, __le32 index, + struct cookie_checker *checker); +void wg_cookie_message_consume(struct message_handshake_cookie *src, + struct wg_device *wg); + +#endif /* _WG_COOKIE_H */ -- cgit v1.3.1