verify that maps is a list before trying to deref the pointer

radareorg · Jun 14, 2019 · a1ade7d · a1ade7d
1 parent cd343d1
commit a1ade7d
Showing 1 changed file with 6 additions and 2 deletions.
diff --git a/libr/core/visual.c b/libr/core/visual.c
@@ -203,7 +203,9 @@ static bool __core_visual_gogo (RCore *core, int ch) {
 			RIOMap *map = r_io_map_get (core->io, core->offset);
 			if (!map) {
 				SdbListIter *i = ls_tail (core->io->maps);
-				map = ls_iter_get (i);
+				if (i) {
+					map = ls_iter_get (i);
+				}
 			}
 			if (map) {
 				r_core_seek (core, r_itv_begin (map->itv), 1);
@@ -217,7 +219,9 @@ static bool __core_visual_gogo (RCore *core, int ch) {
 		map = r_io_map_get (core->io, core->offset);
 		if (!map) {
 			SdbListIter *i = ls_head (core->io->maps);
-			map = ls_iter_get (i);
+			if (i) {
+				map = ls_iter_get (i);
+			}
 		}
 		if (map) {
 			RPrint *p = core->print;