[PATCH] perf probe: fix module name matching

[Konstantin Khlebnikov <khlebnikov@yandex-team.ru>]

If module is "module" then dso->short_name is "[module]".
Substring comparing is't enough: "raid10" matches to "[raid1]".
This patch also checks terminating zero in module name.

Signed-off-by: Konstantin Khlebnikov <khlebnikov@yandex-team.ru>
---
 tools/perf/util/probe-event.c |    4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/tools/perf/util/probe-event.c b/tools/perf/util/probe-event.c
index 953dc1ab2ed7..c27b7aca4a6d 100644
--- a/tools/perf/util/probe-event.c
+++ b/tools/perf/util/probe-event.c
@@ -170,8 +170,10 @@ static struct map *kernel_get_module_map(const char *module)
 		module = "kernel";
 
 	for (pos = maps__first(maps); pos; pos = map__next(pos)) {
+		/* short_name is "[module]" */
 		if (strncmp(pos->dso->short_name + 1, module,
-			    pos->dso->short_name_len - 2) == 0) {
+			    pos->dso->short_name_len - 2) == 0 &&
+		    module[pos->dso->short_name_len - 2] == 0) {
 			return pos;
 		}
 	}