Merge tag 'trace-3.8-rc2-regression-fix' of git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-trace

Pull tracing regression fix from Steven Rostedt:
 "A change that came in this merge window broke the writing to the
  trace_options file.  It causes garbage to be read during the compare
  of option names, and breaks setting options via the trace_options
  file, although options can still be set via the options/<option>
  files."

* tag 'trace-3.8-rc2-regression-fix' of git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-trace:
  tracing: Fix regression of trace_options file setting

1 files changed, 2 insertions, 0 deletions

diff --git a/kernel/trace/trace.c b/kernel/trace/trace.c
index e5125677efa0..1bbfa0446507 100644
--- a/kernel/trace/trace.c
+++ b/kernel/trace/trace.c
@@ -2899,6 +2899,8 @@ tracing_trace_options_write(struct file *filp, const char __user *ubuf,
         if (copy_from_user(&buf, ubuf, cnt))
                 return -EFAULT;
 
+        buf[cnt] = 0;
+
         trace_set_options(buf);
 
         *ppos += cnt;