From c3270a5d4bf47c81a4a8e2baf6235d8072ac5def Mon Sep 17 00:00:00 2001 From: Xiaoke Wang Date: Tue, 25 Jan 2022 12:07:15 +0800 Subject: [PATCH] tracing/histogram: Fix a potential memory leak for kstrdup() kfree() is missing on an error path to free the memory allocated by kstrdup(): p = param = kstrdup(data->params[i], GFP_KERNEL); So it is better to free it via kfree(p). Link: https://lkml.kernel.org/r/tencent_C52895FD37802832A3E5B272D05008866F0A@qq.com Cc: stable@vger.kernel.org Fixes: 71d97ea49f9a0 ("tracing: Fix now invalid var_ref_vals assumption in trace action") Signed-off-by: Xiaoke Wang Signed-off-by: Steven Rostedt (Google) --- kernel/trace/trace_events_hist.c | 1 + 1 file changed, 1 insertion(+) diff --git a/kernel/trace/trace_events_hist.c b/kernel/trace/trace_events_hist.c index 5e6a988a8a517..cd9610688ddca 100644 --- a/kernel/trace/trace_events_hist.c +++ b/kernel/trace/trace_events_hist.c @@ -3935,6 +3935,7 @@ static int trace_action_create(struct hist_trigger_data *hist_data, var_ref_idx = find_var_ref_idx(hist_data, var_ref); if (WARN_ON(var_ref_idx < 0)) { + kfree(p); ret = var_ref_idx; goto err; } -- 2.39.5