netdev - Re: [PATCH net-next 3/5] net: skbuff: move alloc

lists.openwall.net		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 linux-cve-announce 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:   Fri, 14 Apr 2023 10:51:41 -0700
From:   Florian Fainelli <f.fainelli@...il.com>
To:     Jakub Kicinski <kuba@...nel.org>, davem@...emloft.net
Cc:     netdev@...r.kernel.org, edumazet@...gle.com, pabeni@...hat.com
Subject: Re: [PATCH net-next 3/5] net: skbuff: move alloc_cpu into a potential
 hole

On 4/14/23 09:01, Jakub Kicinski wrote:
> alloc_cpu is currently between 4 byte fields, so it's almost
> guaranteed to create a 2B hole. It has a knock on effect of
> creating a 4B hole after @end (and @end and @tail being in
> different cachelines).
> 
> None of this matters hugely, but for kernel configs which
> don't enable all the features there may well be a 2B hole
> after the bitfield. Move alloc_cpu there.
> 
> Signed-off-by: Jakub Kicinski <kuba@...nel.org>

Reviewed-by: Florian Fainelli <f.fainelli@...il.com>
-- 
Florian