diff options
Diffstat (limited to 'kernel/trace/trace_events_filter.c')
| -rw-r--r-- | kernel/trace/trace_events_filter.c | 10 |
1 files changed, 9 insertions, 1 deletions
diff --git a/kernel/trace/trace_events_filter.c b/kernel/trace/trace_events_filter.c index fe3e086d38e9..67654bb5bc2f 100644 --- a/kernel/trace/trace_events_filter.c +++ b/kernel/trace/trace_events_filter.c @@ -1015,6 +1015,9 @@ static void parse_init(struct filter_parse_state *ps, static char infix_next(struct filter_parse_state *ps) { + if (!ps->infix.cnt) + return 0; + ps->infix.cnt--; return ps->infix.string[ps->infix.tail++]; @@ -1030,6 +1033,9 @@ static char infix_peek(struct filter_parse_state *ps) static void infix_advance(struct filter_parse_state *ps) { + if (!ps->infix.cnt) + return; + ps->infix.cnt--; ps->infix.tail++; } @@ -1342,7 +1348,9 @@ static int check_preds(struct filter_parse_state *ps) continue; } n_normal_preds++; - WARN_ON_ONCE(cnt < 0); + /* all ops should have operands */ + if (cnt < 0) + break; } if (cnt != 1 || !n_normal_preds || n_logical_preds >= n_normal_preds) { |