Commit 76638d96 authored Jan 16, 2018 by Changbin Du Committed by Steven Rostedt (VMware) Jan 23, 2018

tracing: Clear parser->idx if only spaces are read

If only spaces were read while parsing the next string, then parser->idx should be
cleared in order to make trace_parser_loaded() return false.

Link: http://lkml.kernel.org/r/1516093350-12045-3-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>

parent 921a7acd

kernel/trace/trace.c

+2 −2

Original line number	Diff line number	Diff line
		@@ -1236,14 +1236,14 @@ int trace_get_user(struct trace_parser parser, const char __user ubuf,
		cnt--;
		}

		parser->idx = 0;

		/* only spaces were written */
		if (isspace(ch) \|\| !ch) {
		*ppos += read;
		ret = read;
		goto out;
		}

		parser->idx = 0;
		}

		/* read the non-space input */