From 50ab48b035c2555e09cc9ac94c74f45b74b234f4 Mon Sep 17 00:00:00 2001
From: Szabolcs Nagy <nsz@port70.net>
Date: Fri, 19 Sep 2014 23:44:28 +0200
Subject: [PATCH] flockfile list corruption test

---
 src/regression/flockfile-list.c | 42 +++++++++++++++++++++++++++++++++
 1 file changed, 42 insertions(+)
 create mode 100644 src/regression/flockfile-list.c

diff --git a/src/regression/flockfile-list.c b/src/regression/flockfile-list.c
new file mode 100644
index 0000000..09f18ff
--- /dev/null
+++ b/src/regression/flockfile-list.c
@@ -0,0 +1,42 @@
+// commit: 3e936ce81bbbcc968f576aedbd5203621839f152 2014-09-19
+// flockfile linked list handling was broken
+#include <errno.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include "test.h"
+
+int main()
+{
+	FILE *f = tmpfile();
+	FILE *g = tmpfile();
+	flockfile(g);
+	flockfile(f);
+	funlockfile(g);
+	fclose(g);
+
+	/* fill memory */
+	if (t_vmfill(0,0,0) < 0)
+		t_error("vmfill failed: %s\n", strerror(errno));
+	size_t i,n;
+	unsigned char *p;
+	for (n = 1; n < 10000; n++) {
+		if (!(p=malloc(n))) break;
+		free(p);
+	}
+	n--;
+	if (!(p=malloc(n))) {
+		t_error("bad malloc fragmentation\n");
+		return t_status;
+	}
+	memset(p, 0xff, n);
+
+	/* may corrupt memory */
+	funlockfile(f);
+	for (i=0; i<n; i++) {
+		if (p[i]!=0xff) {
+			t_error("p[%zu] = %.2x\n", i, p[i]);
+		}
+	}
+	return t_status;
+}
-- 
2.20.1