From de0632c2e9d5663157c64e6b4353d856b18ce224 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?J=C3=BCrgen=20H=C3=B6tzel?= <juergen@hoetzel.info>
Date: Mon, 16 Apr 2018 12:39:15 +0200
Subject: [PATCH] Fix memory corruption when number of filesystems > 16 (#900)

Signed-off-by: Juergen Hoetzel <juergen@archlinux.org>
---
 collector/filesystem_freebsd.go | 19 ++++++++-----------
 1 file changed, 8 insertions(+), 11 deletions(-)

diff --git a/collector/filesystem_freebsd.go b/collector/filesystem_freebsd.go
index 07167161..4df17d70 100644
--- a/collector/filesystem_freebsd.go
+++ b/collector/filesystem_freebsd.go
@@ -41,17 +41,14 @@ func gostring(b []int8) string {
 
 // Expose filesystem fullness.
 func (c *filesystemCollector) GetStats() ([]filesystemStats, error) {
-	buf := make([]unix.Statfs_t, 16)
-	for {
-		n, err := unix.Getfsstat(buf, noWait)
-		if err != nil {
-			return nil, err
-		}
-		if n < len(buf) {
-			buf = buf[:n]
-			break
-		}
-		buf = make([]unix.Statfs_t, len(buf)*2)
+	n, err := unix.Getfsstat(nil, noWait)
+	if err != nil {
+		return nil, err
+	}
+	buf := make([]unix.Statfs_t, n)
+	_, err = unix.Getfsstat(buf, noWait)
+	if err != nil {
+		return nil, err
 	}
 	stats := []filesystemStats{}
 	for _, fs := range buf {