diff options
| author | Changbin Du <changbin.du@intel.com> | 2018-01-16 10:02:29 +0100 |
|---|---|---|
| committer | Steven Rostedt (VMware) <rostedt@goodmis.org> | 2018-01-23 21:57:28 +0100 |
| commit | 76638d96502744b0d593f2386b75ae5a017c13bb (patch) | |
| tree | cb6b25e2586657ecd8adb61deae7a3ebc00f8247 /kernel | |
| parent | tracing: Detect the string nul character when parsing user input string (diff) | |
| download | linux-76638d96502744b0d593f2386b75ae5a017c13bb.tar.xz linux-76638d96502744b0d593f2386b75ae5a017c13bb.zip | |
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>
Diffstat (limited to 'kernel')
| -rw-r--r-- | kernel/trace/trace.c | 4 |
1 files 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 */ |