zfs_arc plugin: leave enough room for terminating null

CID #38028

Signed-off-by: Florian Forster <octo@collectd.org>

diff --git a/src/zfs_arc.c b/src/zfs_arc.c
index f0d2323..540a1db 100644 (file)
--- a/src/zfs_arc.c
+++ b/src/zfs_arc.c
@@ -186,7 +186,7 @@ static int za_read (void)
                return (-1);
        }
 
-       len = read_file_contents (ZOL_ARCSTATS_FILE, file_contents, sizeof(file_contents));
+       len = read_file_contents (ZOL_ARCSTATS_FILE, file_contents, sizeof(file_contents) - 1);
        if (len > 1)
        {