From: Chris Wright <chrisw@osdl.org>
To: shanthi kiran pendyala <skiranp@cisco.com>
Cc: linux-kernel@vger.kernel.org
Subject: Re: Mmap problem (VM_DENYWRITE)
Date: Mon, 24 May 2004 13:29:10 -0700 [thread overview]
Message-ID: <20040524132910.K22989@build.pdx.osdl.net> (raw)
In-Reply-To: <000a01c441bf$ccb83600$322147ab@amer.cisco.com>; from skiranp@cisco.com on Mon, May 24, 2004 at 11:49:10AM -0700
* shanthi kiran pendyala (skiranp@cisco.com) wrote:
> The complete prot flag is (VM_READ | VM_WRITE | VM_EXEC | VM_GROWSUP |
> VM_DENYWRITE)
[snip]
> Output after running test program
> =================================
> building page tables for va 0x2aac5000 phy 0x10940000
> vsize 0x20000 psize 0x20000 prot 0xa07
>
[snip]
> printk("<1> vsize 0x%lx psize 0x%lx prot 0x%lx\n",
> vsize, psize, vma->vm_page_prot.pgprot);
I believe you've drawn the wrong conclusion. This contains page
protection bits relevant for the page tables. You've decoded
vm_page_prot as if it were vm_flags.
thanks,
-chris
--
Linux Security Modules http://lsm.immunix.org http://lsm.bkbits.net
prev parent reply other threads:[~2004-05-24 20:30 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <20040519062044.15651.qmail@web90107.mail.scd.yahoo.com>
2004-05-24 18:49 ` shanthi kiran pendyala
2004-05-24 18:58 ` Tommy Reynolds
2004-05-24 20:22 ` Richard B. Johnson
2004-05-24 20:29 ` Chris Wright [this message]
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