diff options
| -rw-r--r-- | kernel/trace/trace_events_filter.c | 23 |
1 files changed, 12 insertions, 11 deletions
diff --git a/kernel/trace/trace_events_filter.c b/kernel/trace/trace_events_filter.c index 7d306b74230f..0171407d231f 100644 --- a/kernel/trace/trace_events_filter.c +++ b/kernel/trace/trace_events_filter.c @@ -750,31 +750,32 @@ static int filter_pred_none(struct filter_pred *pred, void *event) * * Note: * - @str might not be NULL-terminated if it's of type DYN_STRING - * or STATIC_STRING + * or STATIC_STRING, unless @len is zero. */ static int regex_match_full(char *str, struct regex *r, int len) { - if (strncmp(str, r->pattern, len) == 0) - return 1; - return 0; + /* len of zero means str is dynamic and ends with '\0' */ + if (!len) + return strcmp(str, r->pattern) == 0; + + return strncmp(str, r->pattern, len) == 0; } static int regex_match_front(char *str, struct regex *r, int len) { - if (len < r->len) + if (len && len < r->len) return 0; - if (strncmp(str, r->pattern, r->len) == 0) - return 1; - return 0; + return strncmp(str, r->pattern, r->len) == 0; } static int regex_match_middle(char *str, struct regex *r, int len) { - if (strnstr(str, r->pattern, len)) - return 1; - return 0; + if (!len) + return strstr(str, r->pattern) != NULL; + + return strnstr(str, r->pattern, len) != NULL; } static int regex_match_end(char *str, struct regex *r, int len) |