From: Yuhong Bao <yuhongbao_386@hotmail.com>
To: linux-kernel@vger.kernel.org
Subject: Re: [PATCH] x86/kconfig/32: Make CONFIG_VM86 default to n and remove EXPERT
Date: Thu, 9 Jul 2015 19:27:25 +0000 (UTC) [thread overview]
Message-ID: <loom.20150709T212625-445@post.gmane.org> (raw)
In-Reply-To: dae7c0f1282a92e5eeac8b9fc389e2a02051d9cb.1436467147.git.luto@kernel.org
Andy Lutomirski <luto <at> kernel.org> writes:
>
> VM86 is entirely broken if ptrace, syscall auditing, or NOHZ_FULL is
> in use. The code is a big undocumented mess, it's a real PITA to
> test, and it looks like a big chunk of vm86_32.c is dead code. It
> also plays awful games with the entry asm.
Don't forget that it also depends on the null page being mapped, which is
why MS disabled it in Win8 by default.
prev parent reply other threads:[~2015-07-09 19:27 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-07-09 18:40 [PATCH] x86/kconfig/32: Make CONFIG_VM86 default to n and remove EXPERT Andy Lutomirski
2015-07-09 18:43 ` Kees Cook
2015-07-09 18:51 ` Arjan van de Ven
2015-07-09 19:00 ` Andy Lutomirski
2015-07-09 19:20 ` Linus Torvalds
2015-07-09 19:42 ` John Stoffel
2015-07-10 13:41 ` Pavel Machek
2015-07-10 8:45 ` Ingo Molnar
2015-07-09 19:27 ` Yuhong Bao [this message]
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