diff options
| author | Beau Belgrave <beaub@linux.microsoft.com> | 2022-03-29 00:32:25 +0200 |
|---|---|---|
| committer | Steven Rostedt (Google) <rostedt@goodmis.org> | 2022-04-02 14:40:09 +0200 |
| commit | efe34e99fc41ad2b3fd3bbe79ecd3906620ec961 (patch) | |
| tree | c6685f6b0675862b9f23d1ab7f9f42e56b86f1ea /kernel/trace | |
| parent | proc: bootconfig: Add null pointer check (diff) | |
| download | linux-efe34e99fc41ad2b3fd3bbe79ecd3906620ec961.tar.xz linux-efe34e99fc41ad2b3fd3bbe79ecd3906620ec961.zip | |
tracing/user_events: Hold event_mutex during dyn_event_add
Make sure the event_mutex is properly held during dyn_event_add call.
This is required when adding dynamic events.
Link: https://lkml.kernel.org/r/20220328223225.1992-1-beaub@linux.microsoft.com
Reported-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
Signed-off-by: Beau Belgrave <beaub@linux.microsoft.com>
Acked-by: Masami Hiramatsu <mhiramat@kernel.org>
Signed-off-by: Steven Rostedt (Google) <rostedt@goodmis.org>
Diffstat (limited to '')
| -rw-r--r-- | kernel/trace/trace_events_user.c | 8 |
1 files changed, 6 insertions, 2 deletions
diff --git a/kernel/trace/trace_events_user.c b/kernel/trace/trace_events_user.c index 8b3d241a31c2..61d78d64bdf0 100644 --- a/kernel/trace/trace_events_user.c +++ b/kernel/trace/trace_events_user.c @@ -1165,11 +1165,11 @@ static int user_event_parse(char *name, char *args, char *flags, #endif mutex_lock(&event_mutex); + ret = user_event_trace_register(user); - mutex_unlock(&event_mutex); if (ret) - goto put_user; + goto put_user_lock; user->index = index; @@ -1181,8 +1181,12 @@ static int user_event_parse(char *name, char *args, char *flags, set_bit(user->index, page_bitmap); hash_add(register_table, &user->node, key); + mutex_unlock(&event_mutex); + *newuser = user; return 0; +put_user_lock: + mutex_unlock(&event_mutex); put_user: user_event_destroy_fields(user); user_event_destroy_validators(user); |