From: Changbin Du <[email protected]> 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/[email protected] Acked-by: Namhyung Kim <[email protected]> Signed-off-by: Changbin Du <[email protected]> Signed-off-by: Steven Rostedt (VMware) <[email protected]> --- kernel/trace/trace.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/kernel/trace/trace.c b/kernel/trace/trace.c index c00a31d18f8a..cb90435e63da 100644 --- a/kernel/trace/trace.c +++ b/kernel/trace/trace.c @@ -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 */ -- 2.15.1
