Comment 0 for bug 1873448

Using host libthread_db library "/lib/aarch64-linux-gnu/libthread_db.so.1".
stress-ng: info: [10979] defaulting to a 86400 second run per stressor
stress-ng: info: [10979] dispatching hogs: 1 dup
stress-ng: info: [10979] cache allocate: using built-in defaults as unable to determine cache details
stress-ng: info: [10979] cache allocate: default cache size: 2048K
[New process 10982]
[Thread debugging using libthread_db enabled]
Using host libthread_db library "/lib/aarch64-linux-gnu/libthread_db.so.1".
65536 1048573

Thread 2.1 "stress-ng-dup" received signal SIGSEGV, Segmentation fault.
[Switching to Thread 0xffffb7ff1000 (LWP 10982)]
0x00000000004191f0 in stress_dup (counter=0xffffb7cbee78, instance=<optimised out>, max_ops=0, name=<optimised out>)
    at stress-dup.c:63
63 fds[i] = dup(fds[0]);

This requires a fix from commit:

67d872611b860a79b03dca8c7549e5cee7fec4eb Mon Sep 17 00:00:00 2001
From: Colin Ian King <email address hidden>
Date: Tue, 8 Nov 2016 15:50:20 +0000
Subject: [PATCH] treewide: remove messy #if defined() build checks

diff --git a/stress-dup.c b/stress-dup.c
index 2fe2d6a6..0ac13fee 100644
--- a/stress-dup.c
+++ b/stress-dup.c
@@ -45,7 +45,7 @@ int stress_dup(
        const char *name)
 {
        int fds[STRESS_FD_MAX];
- const size_t max_fd = stress_get_file_limit();
+ size_t max_fd = stress_get_file_limit();
        size_t i;
 #if defined(__linux__)
        bool do_dup3 = true;
@@ -53,6 +53,9 @@ int stress_dup(

        (void)instance;

+ if (max_fd > SIZEOF_ARRAY(fds))
+ max_fd = SIZEOF_ARRAY(fds);
+
        fds[0] = open("/dev/zero", O_RDONLY);
        if (fds[0] < 0) {
                pr_fail_dbg(name, "open on /dev/zero");