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  linux-hardening  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:   Mon, 23 Jan 2017 16:13:39 +0900
From:   Sergey Senozhatsky <>
To:     Joonsoo Kim <>
Cc:     Sergey Senozhatsky <>,
        zhouxianrong <>,,,,,,,,,,,
Subject: Re: [PATCH] mm: extend zero pages to same element pages for zram

On (01/23/17 15:27), Joonsoo Kim wrote:
> Hello,
> Think about following case in 64 bits kernel.
> If value pattern in the page is like as following, we cannot detect
> the same page with 'unsigned int' element.
> 4 bytes is 0xAAAAAAAA and next 4 bytes is 0xBBBBBBBB and so on.

yep, that's exactly the case that I though would be broken
with a 4-bytes pattern matching. so my conlusion was that
for 4 byte pattern we would have working detection anyway,
for 8 bytes patterns we might have some extra matching.
not sure if it matters that much though.


Powered by blists - more mailing lists