From 2083670aceff0e6712241bf955ce6427edf8bd96 Mon Sep 17 00:00:00 2001
From: snow flurry <snow@datagirl.xyz>
Date: Tue, 17 Nov 2020 22:19:00 -0800
Subject: [PATCH] corrupt: fix end==0 bug

---
 src/corrupt.c | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/src/corrupt.c b/src/corrupt.c
index 2be7b33..d90eafd 100644
--- a/src/corrupt.c
+++ b/src/corrupt.c
@@ -43,13 +43,15 @@ match_rule(config_t *conf, dosfile_t *file)
 int
 corrupt_file(dosfs_t *fsd, dosfile_t *file, config_t *conf, uint32_t *state)
 {
-    uint32_t off;
+    uint32_t off, end;
     int real_off;
     unsigned char c;
     struct conf_opts_t opts;
 
+    end = (conf->end) ? conf->end : file->ent.size;
+
     opts = conf->opts;
-    for (off = conf->start; (off < conf->end) && (off < file->ent.size);
+    for (off = conf->start; (off < end) && (off < file->ent.size);
         off += xs_randb(state, conf->skip_a, conf->skip_b)) {
         real_off = get_byte_offset(fsd, file, off);
         if (real_off < 0) {