Patch "tracing: Fix return value check in trace_benchmark_reg()" has been added to the 4.10-stable tree

Patch "tracing: Fix return value check in trace_benchmark_reg()" has been added to the 4.10-stable tree

[gregkh]

This is a note to let you know that I've just added the patch titled

    tracing: Fix return value check in trace_benchmark_reg()

to the 4.10-stable tree which can be found at:
    http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary

The filename of the patch is:
     tracing-fix-return-value-check-in-trace_benchmark_reg.patch
and it can be found in the queue-4.10 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@vger.kernel.org> know about it.


>From 8f0994bb8cbde5452e58ce0cacdbf6cb58079d01 Mon Sep 17 00:00:00 2001
From: Wei Yongjun <weiyongjun1@huawei.com>
Date: Thu, 12 Jan 2017 13:55:02 +0000
Subject: tracing: Fix return value check in trace_benchmark_reg()

From: Wei Yongjun <weiyongjun1@huawei.com>

commit 8f0994bb8cbde5452e58ce0cacdbf6cb58079d01 upstream.

In case of error, the function kthread_run() returns ERR_PTR() and never
returns NULL. The NULL test in the return value check should be replaced
with IS_ERR().

Link: http://lkml.kernel.org/r/20170112135502.28556-1-weiyj.lk@gmail.com

Fixes: 81dc9f0e ("tracing: Add tracepoint benchmark tracepoint")
Signed-off-by: Wei Yongjun <weiyongjun1@huawei.com>
Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

---
 kernel/trace/trace_benchmark.c |    4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

--- a/kernel/trace/trace_benchmark.c
+++ b/kernel/trace/trace_benchmark.c
@@ -175,9 +175,9 @@ int trace_benchmark_reg(void)
 
 	bm_event_thread = kthread_run(benchmark_event_kthread,
 				      NULL, "event_benchmark");
-	if (!bm_event_thread) {
+	if (IS_ERR(bm_event_thread)) {
 		pr_warning("trace benchmark failed to create kernel thread\n");
-		return -ENOMEM;
+		return PTR_ERR(bm_event_thread);
 	}
 
 	return 0;


Patches currently in stable-queue which might be from weiyongjun1@huawei.com are

queue-4.10/tracing-fix-return-value-check-in-trace_benchmark_reg.patch