tracing: Make sure the parsed string always terminates with '\0'

Always mark the parsed string with a terminated nul '\0' character. This removes
the need for the users to have to append the '\0' before using the parsed string.

Link: http://lkml.kernel.org/r/1516093350-12045-4-git-send-email-changbin.du@intel.com

Acked-by: Namhyung Kim <namhyung@kernel.org>
Signed-off-by: Changbin Du <changbin.du@intel.com>
Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.org>

1 files changed, 0 insertions, 2 deletions

diff --git a/kernel/trace/ftrace.c b/kernel/trace/ftrace.c
index 554b517c61a0..dabd9d167d42 100644
--- a/kernel/trace/ftrace.c
+++ b/kernel/trace/ftrace.c
@@ -5015,7 +5015,6 @@ int ftrace_regex_release(struct inode *inode, struct file *file)
 
         parser = &iter->parser;
         if (trace_parser_loaded(parser)) {
-                parser->buffer[parser->idx] = 0;
                 ftrace_match_records(iter->hash, parser->buffer, parser->idx);
         }
 
@@ -5329,7 +5328,6 @@ ftrace_graph_release(struct inode *inode, struct file *file)
                 parser = &fgd->parser;
 
                 if (trace_parser_loaded((parser))) {
-                        parser->buffer[parser->idx] = 0;
                         ret = ftrace_graph_set_hash(fgd->new_hash,
                                                     parser->buffer);
                 }