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@xxxxxxxxxxxxxxx> know about it. >From 8f0994bb8cbde5452e58ce0cacdbf6cb58079d01 Mon Sep 17 00:00:00 2001 From: Wei Yongjun <weiyongjun1@xxxxxxxxxx> Date: Thu, 12 Jan 2017 13:55:02 +0000 Subject: tracing: Fix return value check in trace_benchmark_reg() From: Wei Yongjun <weiyongjun1@xxxxxxxxxx> 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@xxxxxxxxx Fixes: 81dc9f0e ("tracing: Add tracepoint benchmark tracepoint") Signed-off-by: Wei Yongjun <weiyongjun1@xxxxxxxxxx> Signed-off-by: Steven Rostedt (VMware) <rostedt@xxxxxxxxxxx> Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx> --- 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@xxxxxxxxxx are queue-4.10/tracing-fix-return-value-check-in-trace_benchmark_reg.patch