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Message-ID: <20250401124525.1f9ac02a@gandalf.local.home>
Date: Tue, 1 Apr 2025 12:45:25 -0400
From: Steven Rostedt <rostedt@...dmis.org>
To: LKML <linux-kernel@...r.kernel.org>, Linux Trace Kernel
<linux-trace-kernel@...r.kernel.org>
Cc: Masami Hiramatsu <mhiramat@...nel.org>, Mathieu Desnoyers
<mathieu.desnoyers@...icios.com>
Subject: [PATCH] tracing: Free module_delta on freeing of persistent ring
buffer
From: Steven Rostedt <rostedt@...dmis.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@...dmis.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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