From mboxrd@z Thu Jan  1 00:00:00 1970
From: christophe.hauser@supelec.fr (Christophe Hauser)
Date: Thu, 23 Aug 2012 15:06:17 +0200
Subject: mmap
Message-ID: <20120823130617.GF14639@Latty>
To: kernelnewbies@lists.kernelnewbies.org
List-Id: kernelnewbies.lists.kernelnewbies.org

Hi all,

When tracking mmaps from LSM with the following hook:

static int file_mmap(struct file *file, unsigned long reqprot,
        unsigned long prot, unsigned long flags,
                unsigned long addr, unsigned long addr_only);

I often get:
file = NULL
flags = 0x0 (MAP_FILE)
prot = 0x0 (PROT_NONE)

I am wondering what is the use for mmap with MAP_FILE and PROT_NONE together ?
Not sure how to interpret that ?

-- 
Christophe