linux-kernel - [PATCH] tracing: fix incorrect tracer freeing when opening tracing pipe

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Message-ID: <1550060946-45984-1-git-send-email-yi.zhang@huawei.com>
Date:   Wed, 13 Feb 2019 20:29:06 +0800
From:   "zhangyi (F)" <yi.zhang@...wei.com>
To:     <rostedt@...dmis.org>, <mingo@...hat.com>
CC:     <linux-kernel@...r.kernel.org>, <yi.zhang@...wei.com>,
        <miaoxie@...wei.com>
Subject: [PATCH] tracing: fix incorrect tracer freeing when opening tracing pipe

Commit d716ff71dd12 ("tracing: Remove taking of trace_types_lock in
pipe files") use the current tracer instead of the copy in
tracing_open_pipe(), but it forget to remove the freeing sentence in
the error path.

Fixes: d716ff71dd12 ("tracing: Remove taking of trace_types_lock in pipe files")
Signed-off-by: zhangyi (F) <yi.zhang@...wei.com>
---
 kernel/trace/trace.c | 1 -
 1 file changed, 1 deletion(-)

diff --git a/kernel/trace/trace.c b/kernel/trace/trace.c
index c521b73..b583ff7 100644
--- a/kernel/trace/trace.c
+++ b/kernel/trace/trace.c
@@ -5624,7 +5624,6 @@ static int tracing_open_pipe(struct inode *inode, struct file *filp)
 	return ret;
 
 fail:
-	kfree(iter->trace);
 	kfree(iter);
 	__trace_array_put(tr);
 	mutex_unlock(&trace_types_lock);
-- 
2.7.4