linux-kernel - [PATCH] tracing/dynevent: Fix a memory leak in an error handling path

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Date:   Sun, 11 Apr 2021 12:21:54 +0200
From:   Christophe JAILLET <christophe.jaillet@...adoo.fr>
To:     rostedt@...dmis.org, mingo@...hat.com, zanussi@...nel.org,
        mhiramat@...nel.org
Cc:     linux-kernel@...r.kernel.org, kernel-janitors@...r.kernel.org,
        Christophe JAILLET <christophe.jaillet@...adoo.fr>
Subject: [PATCH] tracing/dynevent: Fix a memory leak in an error handling path

We must free 'argv' before returning, as already done in all the other
paths of this function.

Fixes: d262271d0483 ("tracing/dynevent: Delegate parsing to create function")
Signed-off-by: Christophe JAILLET <christophe.jaillet@...adoo.fr>
---
 kernel/trace/trace_dynevent.c | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/kernel/trace/trace_dynevent.c b/kernel/trace/trace_dynevent.c
index dc971a68dda4..e57cc0870892 100644
--- a/kernel/trace/trace_dynevent.c
+++ b/kernel/trace/trace_dynevent.c
@@ -63,8 +63,10 @@ int dyn_event_release(const char *raw_command, struct dyn_event_operations *type
 		event = p + 1;
 		*p = '\0';
 	}
-	if (event[0] == '\0')
-		return -EINVAL;
+	if (event[0] == '\0') {
+		ret = -EINVAL;
+		goto out;
+	}
 
 	mutex_lock(&event_mutex);
 	for_each_dyn_event_safe(pos, n) {
-- 
2.27.0