From: Borislav Petkov <bp@alien8.de>
To: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Dave Jones <davej@codemonkey.org.uk>,
Ingo Molnar <mingo@kernel.org>,
Linux Kernel Mailing List <linux-kernel@vger.kernel.org>,
Thomas Gleixner <tglx@linutronix.de>,
"H. Peter Anvin" <hpa@zytor.com>,
Andrew Morton <akpm@linux-foundation.org>,
Andy Lutomirski <luto@kernel.org>,
Denys Vlasenko <dvlasenk@redhat.com>
Subject: Re: [GIT PULL] x86/mm changes for v4.4
Date: Thu, 5 Nov 2015 23:27:47 +0100 [thread overview]
Message-ID: <20151105222747.GG3579@pd.tnic> (raw)
In-Reply-To: <CA+55aFwa9XsM7bwoQUU01bh6884_84KiU8rhJ6=LC2QYyDneRQ@mail.gmail.com>
On Thu, Nov 05, 2015 at 02:04:55PM -0800, Linus Torvalds wrote:
> and there's quite a few other pages there that are RW but not marked
> NX. I suspect they come from the EFI runtime services because the
Yeah, at least the EFI mappings would need a bit more fiddling until
they're NX:
https://lkml.kernel.org/r/20151012124113.GD2579@codeblueprint.co.uk
Perhaps we don't even have to make them NX - just set the PGD entry
containing them before the EFI call and unset it after its done.
I.e., something like that.
> pattern seems to match what I see in that area, but there's at least a
> PSE mapping at START_KERNEL_map too, etc.
Maybe we should default n CONFIG_DEBUG_WX until stuff has been fixed...?
--
Regards/Gruss,
Boris.
ECO tip #101: Trim your mails when you reply.
next prev parent reply other threads:[~2015-11-05 22:27 UTC|newest]
Thread overview: 26+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-11-03 11:16 [GIT PULL] x86/mm changes for v4.4 Ingo Molnar
2015-11-04 19:26 ` Linus Torvalds
2015-11-04 23:39 ` Dave Jones
2015-11-05 1:31 ` Linus Torvalds
2015-11-05 2:17 ` Dave Jones
2015-11-05 21:27 ` Linus Torvalds
2015-11-05 21:33 ` Linus Torvalds
2015-11-06 11:39 ` Matt Fleming
2015-11-07 7:05 ` Ingo Molnar
2015-11-07 10:03 ` Matt Fleming
2015-11-05 22:04 ` Linus Torvalds
2015-11-05 22:27 ` Borislav Petkov [this message]
2015-11-06 6:55 ` Ingo Molnar
2015-11-06 7:05 ` Andy Lutomirski
2015-11-06 13:09 ` Matt Fleming
2015-11-06 13:24 ` Borislav Petkov
2015-11-07 7:03 ` Ingo Molnar
2015-11-06 7:44 ` Ingo Molnar
2015-11-06 12:39 ` Matt Fleming
2015-11-07 7:09 ` Ingo Molnar
2015-11-07 7:39 ` Ard Biesheuvel
2015-11-08 6:58 ` Kees Cook
2015-11-08 7:55 ` Ard Biesheuvel
2015-11-09 21:08 ` Kees Cook
2015-11-10 7:08 ` Ard Biesheuvel
2015-11-10 20:11 ` Kees Cook
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