From 297b60346df8beafee954a0fd7c2d64f33f3b9bc Mon Sep 17 00:00:00 2001
From: hc <hc@nodka.com>
Date: Sat, 11 May 2024 01:44:05 +0000
Subject: [PATCH] rtl8211F_led_control
---
kernel/kernel/trace/trace_events_trigger.c | 22 ++++++++++++++++++----
1 files changed, 18 insertions(+), 4 deletions(-)
diff --git a/kernel/kernel/trace/trace_events_trigger.c b/kernel/kernel/trace/trace_events_trigger.c
index 32e573c..4bc9096 100644
--- a/kernel/kernel/trace/trace_events_trigger.c
+++ b/kernel/kernel/trace/trace_events_trigger.c
@@ -5,6 +5,7 @@
* Copyright (C) 2013 Tom Zanussi <tom.zanussi@linux.intel.com>
*/
+#include <linux/security.h>
#include <linux/module.h>
#include <linux/ctype.h>
#include <linux/mutex.h>
@@ -174,7 +175,11 @@
static int event_trigger_regex_open(struct inode *inode, struct file *file)
{
- int ret = 0;
+ int ret;
+
+ ret = security_locked_down(LOCKDOWN_TRACEFS);
+ if (ret)
+ return ret;
mutex_lock(&event_mutex);
@@ -209,7 +214,7 @@
return ret;
}
-static int trigger_process_regex(struct trace_event_file *file, char *buff)
+int trigger_process_regex(struct trace_event_file *file, char *buff)
{
char *command, *next;
struct event_command *p;
@@ -299,6 +304,7 @@
static int
event_trigger_open(struct inode *inode, struct file *filp)
{
+ /* Checks for tracefs lockdown */
return event_trigger_regex_open(inode, filp);
}
@@ -750,7 +756,8 @@
goto out;
/* The filter is for the 'trigger' event, not the triggered event */
- ret = create_event_filter(file->event_call, filter_str, false, &filter);
+ ret = create_event_filter(file->tr, file->event_call,
+ filter_str, false, &filter);
/*
* If create_event_filter() fails, filter still needs to be freed.
* Which the calling code will do with data->filter.
@@ -1212,7 +1219,14 @@
stacktrace_trigger(struct event_trigger_data *data, void *rec,
struct ring_buffer_event *event)
{
- trace_dump_stack(STACK_SKIP);
+ struct trace_event_file *file = data->private_data;
+ unsigned long flags;
+
+ if (file) {
+ local_save_flags(flags);
+ __trace_stack(file->tr, flags, STACK_SKIP, preempt_count());
+ } else
+ trace_dump_stack(STACK_SKIP);
}
static void
--
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