diff options
| -rw-r--r-- | kernel/trace/trace_events_filter.c | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/kernel/trace/trace_events_filter.c b/kernel/trace/trace_events_filter.c index 2900d7723d97..52adf02d7619 100644 --- a/kernel/trace/trace_events_filter.c +++ b/kernel/trace/trace_events_filter.c @@ -1056,6 +1056,9 @@ 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++]; @@ -1071,6 +1074,9 @@ 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++; } |