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 --- include/net/handshake.h | 49 +++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 49 insertions(+) create mode 100644 include/net/handshake.h (limited to 'include/net/handshake.h') diff --git a/include/net/handshake.h b/include/net/handshake.h new file mode 100644 index 000000000..8ebd4f9ed --- /dev/null +++ b/include/net/handshake.h @@ -0,0 +1,49 @@ +/* SPDX-License-Identifier: GPL-2.0-only */ +/* + * Generic netlink HANDSHAKE service. + * + * Author: Chuck Lever + * + * Copyright (c) 2023, Oracle and/or its affiliates. + */ + +#ifndef _NET_HANDSHAKE_H +#define _NET_HANDSHAKE_H + +enum { + TLS_NO_KEYRING = 0, + TLS_NO_PEERID = 0, + TLS_NO_CERT = 0, + TLS_NO_PRIVKEY = 0, +}; + +typedef void (*tls_done_func_t)(void *data, int status, + key_serial_t peerid); + +struct tls_handshake_args { + struct socket *ta_sock; + tls_done_func_t ta_done; + void *ta_data; + const char *ta_peername; + unsigned int ta_timeout_ms; + key_serial_t ta_keyring; + key_serial_t ta_my_cert; + key_serial_t ta_my_privkey; + unsigned int ta_num_peerids; + key_serial_t ta_my_peerids[5]; +}; + +int tls_client_hello_anon(const struct tls_handshake_args *args, gfp_t flags); +int tls_client_hello_x509(const struct tls_handshake_args *args, gfp_t flags); +int tls_client_hello_psk(const struct tls_handshake_args *args, gfp_t flags); +int tls_server_hello_x509(const struct tls_handshake_args *args, gfp_t flags); +int tls_server_hello_psk(const struct tls_handshake_args *args, gfp_t flags); + +bool tls_handshake_cancel(struct sock *sk); +void tls_handshake_close(struct socket *sock); + +u8 tls_get_record_type(const struct sock *sk, const struct cmsghdr *msg); +void tls_alert_recv(const struct sock *sk, const struct msghdr *msg, + u8 *level, u8 *description); + +#endif /* _NET_HANDSHAKE_H */ -- cgit v1.3.1