From: David Carlier <devnexen@gmail.com>
To: Steven Rostedt <rostedt@goodmis.org>,
Masami Hiramatsu <mhiramat@kernel.org>
Cc: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>,
linux-trace-kernel@vger.kernel.org, linux-kernel@vger.kernel.org,
David Carlier <devnexen@gmail.com>
Subject: [PATCH] tracing: Take trace_types_lock when dropping the buffer_meta reference
Date: Sun, 13 Sep 2026 14:38:29 +0100 [thread overview]
Message-ID: <20260913133829.15307-1-devnexen@gmail.com> (raw)
tracing_buffer_meta_open() drops the trace_array reference with
__trace_array_put() when ring_buffer_meta_seq_init() fails, without
holding trace_types_lock. Use trace_array_put() like every other open
error path.
Fixes: 950032ffcee7 ("ring-buffer: Add output of ring buffer meta page")
Signed-off-by: David Carlier <devnexen@gmail.com>
---
kernel/trace/trace.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/kernel/trace/trace.c b/kernel/trace/trace.c
index 8658cad53cb5..c8295324ffaa 100644
--- a/kernel/trace/trace.c
+++ b/kernel/trace/trace.c
@@ -5881,7 +5881,7 @@ static int tracing_buffer_meta_open(struct inode *inode, struct file *filp)
ret = ring_buffer_meta_seq_init(filp, tr->array_buffer.buffer, cpu);
if (ret < 0)
- __trace_array_put(tr);
+ trace_array_put(tr);
return ret;
}
--
2.55.0
reply other threads:[~2026-09-13 13:38 UTC|newest]
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