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-rw-r--r--autistdraw.c3
1 files changed, 3 insertions, 0 deletions
diff --git a/autistdraw.c b/autistdraw.c
index 2899251..45f63a5 100644
--- a/autistdraw.c
+++ b/autistdraw.c
@@ -828,7 +828,10 @@ load (app_context_t *app)
if (fscanf (fp, "%d %d %zu %zu", &x, &y, &w, &h) != 4)
goto error;
+ if (w && h > SIZE_MAX / w)
+ goto error;
size_t size = w * h;
+
uint8_t *bitmap = calloc (size, sizeof *bitmap);
if (!bitmap)
goto error;