* [PATCH] tracing: Free module_delta on freeing of persistent ring buffer
@ 2025-04-01 16:45 Steven Rostedt
0 siblings, 0 replies; only message in thread
From: Steven Rostedt @ 2025-04-01 16:45 UTC (permalink / raw)
To: LKML, Linux Trace Kernel; +Cc: Masami Hiramatsu, Mathieu Desnoyers
From: Steven Rostedt <rostedt@goodmis.org>
If a persistent ring buffer is created, a "module_delta" array is also
allocated to hold the module deltas of loaded modules that match modules
in the scratch area. If this buffer gets freed, the module_delta array is
not freed and causes a memory leak.
Fixes: 35a380ddbc65 ("tracing: Show last module text symbols in the stacktrace")
Signed-off-by: Steven Rostedt (Google) <rostedt@goodmis.org>
---
kernel/trace/trace.c | 1 +
1 file changed, 1 insertion(+)
diff --git a/kernel/trace/trace.c b/kernel/trace/trace.c
index 103b193875b3..de6d7f0e6206 100644
--- a/kernel/trace/trace.c
+++ b/kernel/trace/trace.c
@@ -9609,6 +9609,7 @@ static void free_trace_buffers(struct trace_array *tr)
return;
free_trace_buffer(&tr->array_buffer);
+ kfree(tr->module_delta);
#ifdef CONFIG_TRACER_MAX_TRACE
free_trace_buffer(&tr->max_buffer);
--
2.47.2
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