linux-kernel - Re: [GIT PULL] kbuild changes for v4.9-rc1

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: <20161217093357.GA10602@angband.pl>
Date:   Sat, 17 Dec 2016 10:33:57 +0100
From:   Adam Borowski <kilobyte@...band.pl>
To:     Jiri Slaby <jslaby@...e.cz>
Cc:     Linus Torvalds <torvalds@...ux-foundation.org>,
        Nicholas Piggin <npiggin@...il.com>,
        Omar Sandoval <osandov@...ndov.com>,
        Michal Marek <mmarek@...e.com>,
        Alexey Dobriyan <adobriyan@...il.com>,
        Stephen Rothwell <sfr@...b.auug.org.au>,
        Al Viro <viro@...iv.linux.org.uk>,
        Linux Kbuild mailing list <linux-kbuild@...r.kernel.org>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        "linux-arch@...r.kernel.org" <linux-arch@...r.kernel.org>
Subject: Re: [GIT PULL] kbuild changes for v4.9-rc1

On Sat, Dec 17, 2016 at 09:57:47AM +0100, Jiri Slaby wrote:
> On 12/16/2016, 08:57 PM, Linus Torvalds wrote:
> > On Fri, Dec 16, 2016 at 11:55 AM, Jiri Slaby <jslaby@...e.cz> wrote:
> >>
> >> what happened to this? I had to apply this to fix 4.9-pae kernel here.
> > 
> > Did you actually have to do that?
> 
> Yes, disk drivers won't load:
> [    2.141973] virtio_pci: disagrees about version of symbol mcount
> [    2.144415] virtio_pci: Unknown symbol mcount (err -22)
> and whole machine gets stuck with systemd waiting for /dev/sd*.
> 
> > Because a missing CRC shouldn't be fatal in 4.9.

Most of us get just a scary-looking warning, but whatever the problem is for
you, it's good to hear this patch works around it.

Whatever the long-term solution will be, for 4.10 an updated[1] version of
this fix is on kbuild/kbuild (and kbuild/for-next).  I guess we'll bother
stable@ once it is merged.

Note that it handles only x86, there's a bunch of other architectures
affected, alpha m68k s390 sparc ia64 might still need fixing.


Meow!

[1]. Turns out there was a missing symbol on 486; people build-test those
but don't try to actually boot, and even when they do, they don't read
warnings.
-- 
Autotools hint: to do a zx-spectrum build on a pdp11 host, type:
  ./configure --host=zx-spectrum --build=pdp11