--- a/file.c	2020-04-07 21:18:24.000000000 +0200
+++ b/file.c	2020-04-22 20:11:45.714713362 +0200
@@ -493,7 +493,8 @@
                     tmp->data = (uint8_t *)malloc(len2);
                     if (tmp->data != NULL) tmp->len = len2;
                     max_lines = (len2 / 20 + 1024) & ~(size_t)1023;
-                    if (max_lines > SIZE_MAX / sizeof *tmp->line) max_lines = SIZE_MAX / sizeof *tmp->line; /* overflow */
+                    if (max_lines >= INT32_MAX / sizeof *tmp->line)
+			max_lines = (INT32_MAX - 1) / sizeof *tmp->line; /* overflow */
                     tmp->line = (size_t *)malloc(max_lines * sizeof *tmp->line);
                     if (tmp->line == NULL) max_lines = 0;
                 }
@@ -718,8 +719,11 @@
                 last_ubuff = ubuff;
                 tmp->lines = lines;
                 if (lines != max_lines) {
+                    if (lines >= INT32_MAX / sizeof *tmp->line)
+			lines = (INT32_MAX - 1) / sizeof *tmp->line; /* overflow */
                     size_t *d = (size_t *)realloc(tmp->line, lines * sizeof *tmp->line);
-                    if (lines == 0 || d != NULL) tmp->line = d;
+                    if (lines == 0 || d != NULL)
+			tmp->line = d;
                 }
             }
             tmp->len = fp;