From 933bc5f8a72342a711ab1b6b41ec0333c4fc55dd Mon Sep 17 00:00:00 2001
From: Matt Johnston <matt@ucc.asn.au>
Date: Thu, 8 Mar 2018 23:22:53 +0800
Subject: [PATCH] Disable wrapfds outside of fuzzed code

---
 fuzz-harness.c | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/fuzz-harness.c b/fuzz-harness.c
index 53bc71f..be23d4e 100644
--- a/fuzz-harness.c
+++ b/fuzz-harness.c
@@ -18,6 +18,7 @@ int main(int argc, char ** argv) {
 #endif
     }
 
+    int old_fuzz_wrapfds = 0;
     for (i = 1; i < argc; i++) {
         if (argv[i][0] == '-') {
             /* ignore arguments */
@@ -29,11 +30,16 @@ int main(int argc, char ** argv) {
         buf_readfile(input, fn);
         buf_setpos(input, 0);
 
+        fuzz.wrapfds = old_fuzz_wrapfds;
         printf("Running %s once \n", fn);
         LLVMFuzzerTestOneInput(input->data, input->len);
         printf("Running %s twice \n", fn);
         LLVMFuzzerTestOneInput(input->data, input->len);
         printf("Done %s\n", fn);
+
+        /* Disable wrapfd so it won't interfere with buf_readfile() above */
+        old_fuzz_wrapfds = fuzz.wrapfds;
+        fuzz.wrapfds = 0;
     }
 
     printf("Finished\n");