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tracing: Free module_delta on freeing of persistent ring buffer

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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.

Cc: Masami Hiramatsu <mhiramat@kernel.org>
Cc: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
Link: https://lore.kernel.org/20250401124525.1f9ac02a@gandalf.local.home
Fixes: 35a380ddbc ("tracing: Show last module text symbols in the stacktrace")
Signed-off-by: Steven Rostedt (Google) <rostedt@goodmis.org>
This commit is contained in:
Steven Rostedt 2025-04-01 12:45:25 -04:00 committed by Steven Rostedt (Google)
parent b81ff11c21
commit 2c9ee74a6d
1 changed files with 1 additions and 0 deletions
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kernel/trace/trace.c
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@ -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);