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| author | Dan Carpenter <dan.carpenter@oracle.com> | 2018-03-28 14:48:15 +0300 |
|---|---|---|
| committer | Steven Rostedt (VMware) <rostedt@goodmis.org> | 2018-04-06 08:56:50 -0400 |
| commit | b28d7b2dc27f0eef1ae608b49d6860f2463910f1 (patch) | |
| tree | 3d39a6a0f1f4c592e8a201206c5ee0d805a7ac0f | |
| parent | ad452870c66e05819a99b491b500a13989a1c502 (diff) | |
| download | linux-b28d7b2dc27f0eef1ae608b49d6860f2463910f1.tar.bz2 | |
tracing: Uninitialized variable in create_tracing_map_fields()
Smatch complains that idx can be used uninitialized when we check if
(idx < 0). It has to be the first iteration through the loop and the
HIST_FIELD_FL_STACKTRACE bit has to be clear and the HIST_FIELD_FL_VAR
bit has to be set to reach the bug.
Link: http://lkml.kernel.org/r/20180328114815.GC29050@mwanda
Fixes: 30350d65ac56 ("tracing: Add variable support to hist triggers")
Acked-by: Tom Zanussi <tom.zanussi@linux.intel.com>
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.org>
| -rw-r--r-- | kernel/trace/trace_events_hist.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/kernel/trace/trace_events_hist.c b/kernel/trace/trace_events_hist.c index 15ea11c29a51..0d7b3ffbecc2 100644 --- a/kernel/trace/trace_events_hist.c +++ b/kernel/trace/trace_events_hist.c @@ -4458,7 +4458,7 @@ static int create_tracing_map_fields(struct hist_trigger_data *hist_data) struct tracing_map *map = hist_data->map; struct ftrace_event_field *field; struct hist_field *hist_field; - int i, idx; + int i, idx = 0; for_each_hist_field(i, hist_data) { hist_field = hist_data->fields[i]; |