From 40ed29b373381532ef222e509c5aa69a1d8561ea Mon Sep 17 00:00:00 2001 From: YueHaibing Date: Sun, 23 Sep 2018 12:11:33 +0000 Subject: [PATCH] ring-buffer: Fix ring buffer size in rb_write_something() 'cnt' should be used to calculate ring buffer size rather than data->cnt Link: http://lkml.kernel.org/r/1537704693-184237-1-git-send-email-yuehaibing@huawei.com Signed-off-by: YueHaibing Signed-off-by: Steven Rostedt (VMware) --- kernel/trace/ring_buffer.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/kernel/trace/ring_buffer.c b/kernel/trace/ring_buffer.c index 41b6f96e5366..4f33d7d841af 100644 --- a/kernel/trace/ring_buffer.c +++ b/kernel/trace/ring_buffer.c @@ -4979,7 +4979,7 @@ static __init int rb_write_something(struct rb_test_data *data, bool nested) cnt = data->cnt + (nested ? 27 : 0); /* Multiply cnt by ~e, to make some unique increment */ - size = (data->cnt * 68 / 25) % (sizeof(rb_string) - 1); + size = (cnt * 68 / 25) % (sizeof(rb_string) - 1); len = size + sizeof(struct rb_item); -- 2.11.0