linux-kernel - Re: nfsd, v4: oops in find_acceptable_alias, ppc32 Linux, post-2.6.27-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]

Date:	Tue, 05 Aug 2008 21:43:37 +1200
From:	Paul Collins <paul@...ly.ondioline.org>
To:	michael@...erman.id.au
Cc:	"J. Bruce Fields" <bfields@...ldses.org>,
	Neil Brown <neilb@...e.de>, linuxppc-dev@...abs.org,
	nfsv4@...ux-nfs.org, linux-kernel@...r.kernel.org,
	Benjamin Herrenschmidt <benh@...nel.crashing.org>
Subject: Re: nfsd, v4: oops in find_acceptable_alias, ppc32 Linux, post-2.6.27-rc1

Michael Ellerman <michael@...erman.id.au> writes:

> I see you have FTRACE enabled. That's new and could potentially bugger
> things up without the compiler knowing, so can you turn that off.

With FTRACE disabled, doing cross-builds from the 2.6.26 amd64 client, a
setup that normally triggers the problem on the 2nd or 3rd build, I was
able to do 10 complete builds.  ("make clean oldconfig vmlinux modules")

So it looks like ftrace is the cause, or at least provokes some other
usually-latent problem.  I wasn't using it, so I'll just leave it off.

> And can you enable CONFIG_CODE_PATCHING_SELFTEST and
> CONFIG_FTR_FIXUP_SELFTEST, that will enable tests of some code I changed
> that /could/ (maybe) cause random blow ups.

With those options enabled, I get this:

  Running code patching self-tests ...
  Running feature fixup self-tests ...

-- 
Paul Collins
Wellington, New Zealand

Dag vijandelijk luchtschip de huismeester is dood
--
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/