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-rw-r--r--kernel/trace/bpf_trace.c2
-rw-r--r--kernel/trace/ftrace.c28
-rw-r--r--kernel/trace/ring_buffer.c4
-rw-r--r--kernel/trace/trace.c5
-rw-r--r--kernel/trace/trace_events.c4
-rw-r--r--kernel/trace/trace_events_filter.c4
-rw-r--r--kernel/trace/trace_events_synth.c37
-rw-r--r--kernel/trace/trace_functions_graph.c1
-rw-r--r--kernel/trace/trace_irqsoff.c2
-rw-r--r--kernel/trace/trace_osnoise.c1
-rw-r--r--kernel/trace/trace_sched_wakeup.c2
11 files changed, 60 insertions, 30 deletions
diff --git a/kernel/trace/bpf_trace.c b/kernel/trace/bpf_trace.c
index 126754b61edc..dba736defdfe 100644
--- a/kernel/trace/bpf_trace.c
+++ b/kernel/trace/bpf_trace.c
@@ -799,7 +799,7 @@ static int bpf_send_signal_common(u32 sig, enum pid_type type)
if (unlikely(is_global_init(current)))
return -EPERM;
- if (irqs_disabled()) {
+ if (preempt_count() != 0 || irqs_disabled()) {
/* Do an early check on signal validity. Otherwise,
* the error is lost in deferred irq_work.
*/
diff --git a/kernel/trace/ftrace.c b/kernel/trace/ftrace.c
index 6ec08eca7f4b..d91a673ffc3e 100644
--- a/kernel/trace/ftrace.c
+++ b/kernel/trace/ftrace.c
@@ -510,6 +510,7 @@ static int function_stat_show(struct seq_file *m, void *v)
static struct trace_seq s;
unsigned long long avg;
unsigned long long stddev;
+ unsigned long long stddev_denom;
#endif
mutex_lock(&ftrace_profile_lock);
@@ -531,23 +532,19 @@ static int function_stat_show(struct seq_file *m, void *v)
#ifdef CONFIG_FUNCTION_GRAPH_TRACER
seq_puts(m, " ");
- /* Sample standard deviation (s^2) */
- if (rec->counter <= 1)
- stddev = 0;
- else {
- /*
- * Apply Welford's method:
- * s^2 = 1 / (n * (n-1)) * (n * \Sum (x_i)^2 - (\Sum x_i)^2)
- */
+ /*
+ * Variance formula:
+ * s^2 = 1 / (n * (n-1)) * (n * \Sum (x_i)^2 - (\Sum x_i)^2)
+ * Maybe Welford's method is better here?
+ * Divide only by 1000 for ns^2 -> us^2 conversion.
+ * trace_print_graph_duration will divide by 1000 again.
+ */
+ stddev = 0;
+ stddev_denom = rec->counter * (rec->counter - 1) * 1000;
+ if (stddev_denom) {
stddev = rec->counter * rec->time_squared -
rec->time * rec->time;
-
- /*
- * Divide only 1000 for ns^2 -> us^2 conversion.
- * trace_print_graph_duration will divide 1000 again.
- */
- stddev = div64_ul(stddev,
- rec->counter * (rec->counter - 1) * 1000);
+ stddev = div64_ul(stddev, stddev_denom);
}
trace_seq_init(&s);
@@ -6093,6 +6090,7 @@ ftrace_graph_set_hash(struct ftrace_hash *hash, char *buffer)
}
}
}
+ cond_resched();
} while_for_each_ftrace_rec();
out:
mutex_unlock(&ftrace_lock);
diff --git a/kernel/trace/ring_buffer.c b/kernel/trace/ring_buffer.c
index f9f0c198cb43..90a8dd91e2eb 100644
--- a/kernel/trace/ring_buffer.c
+++ b/kernel/trace/ring_buffer.c
@@ -5949,9 +5949,9 @@ static __init int rb_write_something(struct rb_test_data *data, bool nested)
/* Ignore dropped events before test starts. */
if (started) {
if (nested)
- data->bytes_dropped += len;
- else
data->bytes_dropped_nested += len;
+ else
+ data->bytes_dropped += len;
}
return len;
}
diff --git a/kernel/trace/trace.c b/kernel/trace/trace.c
index 3727a926b7fa..baf2867e6dbe 100644
--- a/kernel/trace/trace.c
+++ b/kernel/trace/trace.c
@@ -7034,13 +7034,14 @@ static ssize_t tracing_splice_read_pipe(struct file *filp,
/* Copy the data into the page, so we can start over. */
ret = trace_seq_to_buffer(&iter->seq,
page_address(spd.pages[i]),
- trace_seq_used(&iter->seq));
+ min((size_t)trace_seq_used(&iter->seq),
+ PAGE_SIZE));
if (ret < 0) {
__free_page(spd.pages[i]);
break;
}
spd.partial[i].offset = 0;
- spd.partial[i].len = trace_seq_used(&iter->seq);
+ spd.partial[i].len = ret;
trace_seq_init(&iter->seq);
}
diff --git a/kernel/trace/trace_events.c b/kernel/trace/trace_events.c
index 54a035b079d3..e9d40f9fb09b 100644
--- a/kernel/trace/trace_events.c
+++ b/kernel/trace/trace_events.c
@@ -763,7 +763,9 @@ static int __ftrace_event_enable_disable(struct trace_event_file *file,
clear_bit(EVENT_FILE_FL_RECORDED_TGID_BIT, &file->flags);
}
- call->class->reg(call, TRACE_REG_UNREGISTER, file);
+ ret = call->class->reg(call, TRACE_REG_UNREGISTER, file);
+
+ WARN_ON_ONCE(ret);
}
/* If in SOFT_MODE, just set the SOFT_DISABLE_BIT, else clear it */
if (file->flags & EVENT_FILE_FL_SOFT_MODE)
diff --git a/kernel/trace/trace_events_filter.c b/kernel/trace/trace_events_filter.c
index 60c34fc44a63..1aff7c8723e2 100644
--- a/kernel/trace/trace_events_filter.c
+++ b/kernel/trace/trace_events_filter.c
@@ -676,7 +676,7 @@ static __always_inline char *test_string(char *str)
kstr = ubuf->buffer;
/* For safety, do not trust the string pointer */
- if (!strncpy_from_kernel_nofault(kstr, str, USTRING_BUF_SIZE))
+ if (strncpy_from_kernel_nofault(kstr, str, USTRING_BUF_SIZE) < 0)
return NULL;
return kstr;
}
@@ -695,7 +695,7 @@ static __always_inline char *test_ustring(char *str)
/* user space address? */
ustr = (char __user *)str;
- if (!strncpy_from_user_nofault(kstr, ustr, USTRING_BUF_SIZE))
+ if (strncpy_from_user_nofault(kstr, ustr, USTRING_BUF_SIZE) < 0)
return NULL;
return kstr;
diff --git a/kernel/trace/trace_events_synth.c b/kernel/trace/trace_events_synth.c
index 43da364737a0..ab54810bd8d9 100644
--- a/kernel/trace/trace_events_synth.c
+++ b/kernel/trace/trace_events_synth.c
@@ -293,7 +293,7 @@ static const char *synth_field_fmt(char *type)
else if (strcmp(type, "gfp_t") == 0)
fmt = "%x";
else if (synth_field_is_string(type))
- fmt = "%.*s";
+ fmt = "%s";
else if (synth_field_is_stack(type))
fmt = "%s";
@@ -856,6 +856,39 @@ static struct trace_event_fields synth_event_fields_array[] = {
{}
};
+static int synth_event_reg(struct trace_event_call *call,
+ enum trace_reg type, void *data)
+{
+ struct synth_event *event = container_of(call, struct synth_event, call);
+ int ret;
+
+ switch (type) {
+#ifdef CONFIG_PERF_EVENTS
+ case TRACE_REG_PERF_REGISTER:
+#endif
+ case TRACE_REG_REGISTER:
+ if (!try_module_get(event->mod))
+ return -EBUSY;
+ break;
+ default:
+ break;
+ }
+
+ ret = trace_event_reg(call, type, data);
+
+ switch (type) {
+#ifdef CONFIG_PERF_EVENTS
+ case TRACE_REG_PERF_UNREGISTER:
+#endif
+ case TRACE_REG_UNREGISTER:
+ module_put(event->mod);
+ break;
+ default:
+ break;
+ }
+ return ret;
+}
+
static int register_synth_event(struct synth_event *event)
{
struct trace_event_call *call = &event->call;
@@ -885,7 +918,7 @@ static int register_synth_event(struct synth_event *event)
goto out;
}
call->flags = TRACE_EVENT_FL_TRACEPOINT;
- call->class->reg = trace_event_reg;
+ call->class->reg = synth_event_reg;
call->class->probe = trace_event_raw_event_synth;
call->data = event;
call->tp = event->tp;
diff --git a/kernel/trace/trace_functions_graph.c b/kernel/trace/trace_functions_graph.c
index 6b5ff3ba4251..e81b46a390aa 100644
--- a/kernel/trace/trace_functions_graph.c
+++ b/kernel/trace/trace_functions_graph.c
@@ -1244,6 +1244,7 @@ void graph_trace_close(struct trace_iterator *iter)
if (data) {
free_percpu(data->cpu_data);
kfree(data);
+ iter->private = NULL;
}
}
diff --git a/kernel/trace/trace_irqsoff.c b/kernel/trace/trace_irqsoff.c
index ba37f768e2f2..6c9db857fe0e 100644
--- a/kernel/trace/trace_irqsoff.c
+++ b/kernel/trace/trace_irqsoff.c
@@ -231,8 +231,6 @@ static void irqsoff_trace_open(struct trace_iterator *iter)
{
if (is_graph(iter->tr))
graph_trace_open(iter);
- else
- iter->private = NULL;
}
static void irqsoff_trace_close(struct trace_iterator *iter)
diff --git a/kernel/trace/trace_osnoise.c b/kernel/trace/trace_osnoise.c
index 20a3e201157d..5959b1d4ee45 100644
--- a/kernel/trace/trace_osnoise.c
+++ b/kernel/trace/trace_osnoise.c
@@ -1560,7 +1560,6 @@ static int start_kthread(unsigned int cpu)
if (IS_ERR(kthread)) {
pr_err(BANNER "could not start sampling thread\n");
- stop_per_cpu_kthreads();
return -ENOMEM;
}
diff --git a/kernel/trace/trace_sched_wakeup.c b/kernel/trace/trace_sched_wakeup.c
index b239bfaa51ae..2402de520eca 100644
--- a/kernel/trace/trace_sched_wakeup.c
+++ b/kernel/trace/trace_sched_wakeup.c
@@ -168,8 +168,6 @@ static void wakeup_trace_open(struct trace_iterator *iter)
{
if (is_graph(iter->tr))
graph_trace_open(iter);
- else
- iter->private = NULL;
}
static void wakeup_trace_close(struct trace_iterator *iter)
generated by cgit v1.2.3 (git 2.0.4) at 2025-07-17 08:54:49 +0000