From: Alan Cox <gnomes@lxorguk.ukuu.org.uk>
To: Patrick McLean <chutzpah@gentoo.org>
Cc: linux-kernel@vger.kernel.org, linux-nfs@vger.kernel.org,
stable@vger.kernel.org, regressions@leemhuis.info,
torvalds@linux-foundation.org
Subject: Re: [nfsd4] potentially hardware breaking regression in 4.14-rc and 4.13.11
Date: Sat, 11 Nov 2017 02:47:10 +0000 [thread overview]
Message-ID: <20171111024710.172301eb@alans-desktop> (raw)
In-Reply-To: <a17842c3-aae7-da98-424e-4441dd727e6d@gentoo.org>
On Wed, 8 Nov 2017 16:43:17 -0800
Patrick McLean <chutzpah@gentoo.org> wrote:
> As of 4.13.11 (and also with 4.14-rc) we have an issue where when
> serving nfs4 sometimes we get the following BUG. When this bug happens,
> it usually also causes the motherboard to no longer POST until we
> externally re-flash the BIOS (using the BMC web interface). If a
> motherboard does not have an external way to flash the BIOS, this would
> brick the hardware.
If that is a production x86 system then you need to raise a large red
flag with the vendor because it should not even be possible to splat the
BIOS firmware on a modern PC by running even malicious OS code.
Not only that but if it has a flaw, and you bisect down to create a
reproducer then it's not going to take the bad guys very long to turn it
into an interesting toy to run if they ever exploit a box with that board.
Alan
prev parent reply other threads:[~2017-11-11 2:47 UTC|newest]
Thread overview: 53+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-11-09 0:43 [nfsd4] potentially hardware breaking regression in 4.14-rc and 4.13.11 Patrick McLean
2017-11-09 2:40 ` Linus Torvalds
2017-11-09 3:45 ` Al Viro
2017-11-09 19:34 ` Patrick McLean
2017-11-09 19:38 ` Al Viro
2017-11-09 19:42 ` Patrick McLean
2017-11-09 19:37 ` Al Viro
2017-11-09 19:51 ` Patrick McLean
2017-11-09 20:04 ` Linus Torvalds
2017-11-09 21:16 ` Al Viro
2017-11-10 1:58 ` Patrick McLean
2017-11-10 13:53 ` Arnd Bergmann
2017-11-10 18:42 ` Linus Torvalds
2017-11-10 23:26 ` Patrick McLean
2017-11-11 0:27 ` Patrick McLean
2017-11-11 2:36 ` Linus Torvalds
2017-11-11 16:13 ` Kees Cook
2017-11-11 17:31 ` Linus Torvalds
2017-11-13 22:48 ` Patrick McLean
2017-11-17 0:54 ` Kees Cook
2017-11-17 19:03 ` Patrick McLean
2017-11-17 21:26 ` Kees Cook
2017-11-18 0:27 ` Patrick McLean
2017-11-18 0:55 ` Linus Torvalds
2017-11-18 1:54 ` Patrick McLean
2017-11-18 5:14 ` Kees Cook
2017-11-18 5:29 ` Linus Torvalds
2017-11-18 8:20 ` Kees Cook
2018-02-21 22:19 ` RANDSTRUCT structs need linux/compiler_types.h (Was: [nfsd4] potentially hardware breaking regression in 4.14-rc and 4.13.11) Maciej S. Szmigiero
2018-02-21 22:47 ` Linus Torvalds
2018-02-21 23:34 ` Kees Cook
2018-03-05 9:27 ` Masahiro Yamada
2018-03-05 19:15 ` Kees Cook
2018-03-05 19:18 ` Linus Torvalds
2018-02-21 22:52 ` Kees Cook
2018-02-21 23:24 ` Linus Torvalds
2018-02-22 0:12 ` Kees Cook
2018-02-22 0:22 ` Linus Torvalds
2018-02-22 0:23 ` Kees Cook
2018-02-22 0:27 ` Kees Cook
2017-11-11 1:13 ` [nfsd4] potentially hardware breaking regression in 4.14-rc and 4.13.11 J. Bruce Fields
2017-11-11 2:32 ` Al Viro
2017-11-10 1:47 ` Patrick McLean
2017-11-09 20:47 ` J. Bruce Fields
2017-11-09 23:07 ` Patrick McLean
2017-11-13 22:59 ` bit tweaks [was: Re: [nfsd4] potentially hardware breaking regression in 4.14-rc and 4.13.11] Rasmus Villemoes
2017-11-13 23:30 ` Linus Torvalds
2017-11-13 23:54 ` Linus Torvalds
2017-11-14 22:24 ` Rasmus Villemoes
2017-11-14 22:43 ` Linus Torvalds
2017-11-14 23:53 ` Rasmus Villemoes
2017-11-15 0:02 ` Linus Torvalds
2017-11-11 2:47 ` Alan Cox [this message]
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