linux-kernel - Re: [PATCH 1/3] x86: Separate out x86

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]

Message-ID: <fe7ce2ae1011b240e3a6ee8b0425ff3e2c675b6d.camel@intel.com>
Date:   Tue, 15 Mar 2022 21:53:13 +0000
From:   "Edgecombe, Rick P" <rick.p.edgecombe@...el.com>
To:     "keescook@...omium.org" <keescook@...omium.org>
CC:     "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "viro@...iv.linux.org.uk" <viro@...iv.linux.org.uk>,
        "Williams, Dan J" <dan.j.williams@...el.com>,
        "Wysocki, Rafael J" <rafael.j.wysocki@...el.com>,
        "ebiederm@...ssion.com" <ebiederm@...ssion.com>,
        "Chatre, Reinette" <reinette.chatre@...el.com>,
        "linux-fsdevel@...r.kernel.org" <linux-fsdevel@...r.kernel.org>,
        "Luck, Tony" <tony.luck@...el.com>,
        "Hansen, Dave" <dave.hansen@...el.com>,
        "Brown, Len" <len.brown@...el.com>
Subject: Re: [PATCH 1/3] x86: Separate out x86_regset for 32 and 64 bit

On Tue, 2022-03-15 at 13:41 -0700, Kees Cook wrote:
> Have you verified there's no binary difference in machine code
> output?

There actually was a different in the binaries. I investigated a bit,
and it seemed at least part of it was due to the line numbers changing
the WARN_ON()s. But otherwise, I assumed some compiler optimization
must have been bumped.