linux-kernel - Re: [x86, vdso] BUG: unable to handle kernel paging request at d34bd000

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: <CA+55aFygdFWCVzsSNT6v-8Mnsq8rrFwz0d1ydOLRthv4JsBaBQ@mail.gmail.com>
Date:	Mon, 10 Mar 2014 14:39:19 -0700
From:	Linus Torvalds <torvalds@...ux-foundation.org>
To:	Stefani Seibold <stefani@...bold.net>
Cc:	"H. Peter Anvin" <hpa@...ux.intel.com>,
	Andy Lutomirski <luto@...capital.net>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	Andreas Brief <Andreas.Brief@...de-schwarz.com>,
	Martin Runge <Martin.Runge@...de-schwarz.com>
Subject: Re: [x86, vdso] BUG: unable to handle kernel paging request at d34bd000

On Mon, Mar 10, 2014 at 2:25 PM,  <stefani@...bold.net> wrote:
>
> This was discovered by me.

Sorry for the misattribution.

> But this is not a real solution, at least when vcpu function support
> will be added, then the code size will exceed the page size. Reserving
> two pages for the VDSO is a good option.

Quite frankly, there is no way in hell I will take a patch like that
for 3.14 any more, and I would argue against it for stable.

Now, if this problem never happens with current kernels (because it's
purely due to the patch in -tip), then I don't much care.

That said, I don't understand why we are even adding new features like
this to 32-bit mode in the first place, so if that patch is the sole
source of all this headache, then why not just throw the patch away?

             Linus
--
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/