From 16da27a8bc7a0d050686d1b2e9efb53fab9ed226 Mon Sep 17 00:00:00 2001 From: Li Zefan Date: Thu, 14 Jan 2010 10:54:27 +0800 Subject: [PATCH] tracing/filters: Fix MATCH_FULL filter matching for PTR_STRING MATCH_FULL matching for PTR_STRING is not working correctly: # echo 'func == vt' > events/bkl/lock_kernel/filter # echo 1 > events/bkl/lock_kernel/enable ... # cat trace Xorg-1484 [000] 1973.392586: lock_kernel: ... func=vt_ioctl() gpm-1402 [001] 1974.027740: lock_kernel: ... func=vt_ioctl() We should pass to regex.match(..., len) the length (including '\0') of the source string instead of the length of the pattern string. Signed-off-by: Li Zefan LKML-Reference: <4B4E8763.5070707@cn.fujitsu.com> Acked-by: Frederic Weisbecker Signed-off-by: Steven Rostedt --- kernel/trace/trace_events_filter.c | 7 +++---- 1 file changed, 3 insertions(+), 4 deletions(-) diff --git a/kernel/trace/trace_events_filter.c b/kernel/trace/trace_events_filter.c index f364b085397e..60c2a4efad4a 100644 --- a/kernel/trace/trace_events_filter.c +++ b/kernel/trace/trace_events_filter.c @@ -211,8 +211,9 @@ static int filter_pred_pchar(struct filter_pred *pred, void *event, { char **addr = (char **)(event + pred->offset); int cmp, match; + int len = strlen(*addr) + 1; /* including tailing '\0' */ - cmp = pred->regex.match(*addr, &pred->regex, pred->regex.field_len); + cmp = pred->regex.match(*addr, &pred->regex, len); match = cmp ^ pred->not; @@ -782,10 +783,8 @@ static int filter_add_pred(struct filter_parse_state *ps, pred->regex.field_len = field->size; } else if (field->filter_type == FILTER_DYN_STRING) fn = filter_pred_strloc; - else { + else fn = filter_pred_pchar; - pred->regex.field_len = strlen(pred->regex.pattern); - } } else { if (field->is_signed) ret = strict_strtoll(pred->regex.pattern, 0, &val); -- 2.20.1