lists  /  announce  owl-users  owl-dev  john-users  john-dev  passwdqc-users  yescrypt  popa3d-users  /  oss-security  kernel-hardening  musl  sabotage  tlsify  passwords  /  crypt-dev  xvendor  /  Bugtraq  Full-Disclosure  linux-kernel  linux-netdev  linux-ext4  PHC 
Open Source and information security mailing list archives
Hash Suite: Windows password security audit tool. GUI, reports in PDF.
[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]
Date:   Sat, 12 Aug 2017 19:44:14 -0700
From:   Dan Williams <>
To:     Christoph Hellwig <>
Cc:     Jan Kara <>, linux-nvdimm <>,
        Dave Chinner <>,,
        Andy Lutomirski <>,
        Linux FS Devel <>,
        "" <>
Subject: Re: [RFC PATCH 0/7] dax, ext4: Synchronous page faults

On Fri, Aug 11, 2017 at 3:03 AM, Christoph Hellwig <> wrote:
> On Mon, Aug 07, 2017 at 05:24:08PM -0700, Dan Williams wrote:
>> Does sys_mmap() reject unknown flag values today? I'm either not
>> looking in the right place or it's missing and we'll need some
>> interface/mechanism to check if MAP_SYNC is honored.
> It doesn't seem to reject unknown flags.
> The lack of flags checking strikes back once more, sighṫ.

How about MAP_SYNC == (MAP_SHARED|MAP_PRIVATE)? On older kernels that
should get -EINVAL, and on new kernels it means SYNC+SHARED.

Powered by blists - more mailing lists

Powered by Openwall GNU/*/Linux - Powered by OpenVZ