perf probe: Fix a bug that --line range can be overflow
Since line_finder.lno_s/e are signed int but line_range.start/end
are unsigned int, it is possible to be overflow when converting
line_range->start/end to line_finder->lno_s/e.
This changes line_range.start/end and line_list.line to signed int
and adds overflow checks when setting line_finder.lno_s/e.
LKML-Reference: <20100414223942.14630.72730.stgit@localhost6.localdomain6>
Signed-off-by: Masami Hiramatsu <mhiramat@redhat.com>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Mike Galbraith <efault@gmx.de>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
diff --git a/tools/perf/util/probe-event.h b/tools/perf/util/probe-event.h
index ab54929..e7ff0d0 100644
--- a/tools/perf/util/probe-event.h
+++ b/tools/perf/util/probe-event.h
@@ -74,15 +74,15 @@
/* Line number container */
struct line_node {
struct list_head list;
- unsigned int line;
+ int line;
};
/* Line range */
struct line_range {
char *file; /* File name */
char *function; /* Function name */
- unsigned int start; /* Start line number */
- unsigned int end; /* End line number */
+ int start; /* Start line number */
+ int end; /* End line number */
int offset; /* Start line offset */
char *path; /* Real path name */
struct list_head line_list; /* Visible lines */