linux-kernel - [PATCH] tracing: Fix error handling in event_trigger

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Message-Id: <20250318112737.4174-1-linmq006@gmail.com>
Date: Tue, 18 Mar 2025 19:27:37 +0800
From: Miaoqian Lin <linmq006@...il.com>
To: Steven Rostedt <rostedt@...dmis.org>,
	Masami Hiramatsu <mhiramat@...nel.org>,
	Mathieu Desnoyers <mathieu.desnoyers@...icios.com>,
	Tom Zanussi <zanussi@...nel.org>,
	linux-kernel@...r.kernel.org,
	linux-trace-kernel@...r.kernel.org
Cc: linmq006@...il.com
Subject: [PATCH] tracing: Fix error handling in event_trigger_parse

According to event_trigger_alloc() doc, event_trigger_free() should be
used to free an event_trigger_data object. This fixes a mismatch introduced
when kzalloc was replaced with event_trigger_alloc without updating
the corresponding deallocation calls.

Fixes: e1f187d09e11 ("tracing: Have existing event_command.parse() implementations use helpers")
Signed-off-by: Miaoqian Lin <linmq006@...il.com>
---
 kernel/trace/trace_events_trigger.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/kernel/trace/trace_events_trigger.c b/kernel/trace/trace_events_trigger.c
index d45448947094..8389314b8c2d 100644
--- a/kernel/trace/trace_events_trigger.c
+++ b/kernel/trace/trace_events_trigger.c
@@ -995,7 +995,7 @@ event_trigger_parse(struct event_command *cmd_ops,
 
 	if (remove) {
 		event_trigger_unregister(cmd_ops, file, glob+1, trigger_data);
-		kfree(trigger_data);
+		event_trigger_free(trigger_data);
 		ret = 0;
 		goto out;
 	}
@@ -1022,7 +1022,7 @@ event_trigger_parse(struct event_command *cmd_ops,
 
  out_free:
 	event_trigger_reset_filter(cmd_ops, trigger_data);
-	kfree(trigger_data);
+	event_trigger_free(trigger_data);
 	goto out;
 }
 
-- 
2.39.5 (Apple Git-154)