linux-kernel - Re: [PATCH] ix86: really make user_mode() work correctly for VM86 mode

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: <CALCETrUC_pd3X0DgP3=ROyHKeKga1KfjG6ao7h2f1DzDfzyPmQ@mail.gmail.com>
Date:	Thu, 28 May 2015 10:33:54 -0700
From:	Andy Lutomirski <luto@...capital.net>
To:	Jan Beulich <JBeulich@...e.com>
Cc:	"H. Peter Anvin" <hpa@...or.com>, Ingo Molnar <mingo@...e.hu>,
	Thomas Gleixner <tglx@...utronix.de>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] ix86: really make user_mode() work correctly for VM86 mode

On May 28, 2015 1:16 AM, "Jan Beulich" <JBeulich@...e.com> wrote:
>
> While commit efa7045103 ("x86/asm/entry: Make user_mode() work
> correctly if regs came from VM86 mode") claims that "user_mode() is now
> identical to user_mode_vm()", this wasn't actually the case - no prior
> commit made it so.

That's embarrassing!  I'm not sure how I screwed that up.

Acked-by: Andy Lutomirski <luto@...nel.org>

This is needed for x86/urgent.  I'll see if I can write a simple test
case, too.  My old do_bounds test should be a good start.

--Andy
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/