From: "davej@codemonkey.org.uk" <davej@codemonkey.org.uk>
To: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Trond Myklebust <trondmy@primarydata.com>,
"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
"bfields@fieldses.org" <bfields@fieldses.org>,
"linux-nfs@vger.kernel.org" <linux-nfs@vger.kernel.org>,
"schumaker.anna@gmail.com" <schumaker.anna@gmail.com>,
"linux-fsdevel@vger.kernel.org" <linux-fsdevel@vger.kernel.org>
Subject: Re: [GIT PULL] Please pull NFS client changes for Linux 4.13
Date: Tue, 1 Aug 2017 13:50:31 -0400 [thread overview]
Message-ID: <20170801175031.74llpntgz3qirv3s@codemonkey.org.uk> (raw)
In-Reply-To: <CA+55aFyQdHt0qYQ0uBSK+9wfPOyFfx8mJE4r9FfWoxa3Gyei9g@mail.gmail.com>
On Tue, Aug 01, 2017 at 10:20:31AM -0700, Linus Torvalds wrote:
> So I think the 'pathname' part may actually be entirely a red herring,
> and it's the underlying access itself that just picks up a random
> pointer from a stack that now contains something different. And KASAN
> didn't notice the stale stack access itself, because the stack slot is
> still valid - it's just no longer the original 'verifier' allocation.
>
> Or *something* like that.
>
> None of this looks even remotely new, though - the code seems to go
> back to 2009. Have you just changed what you're testing to trigger
> these things?
No idea why it only just showed up, but it isn't 100% reproducable
either. A month or so ago I did disable the V4 code on the server
completely (as I was using v3 everywhere else), so maybe I started hitting
a fallback path somewhere. *shrug*
Dave
next prev parent reply other threads:[~2017-08-01 17:50 UTC|newest]
Thread overview: 30+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-07-13 21:16 [GIT PULL] Please pull NFS client changes for Linux 4.13 Anna Schumaker
2017-07-13 21:43 ` Linus Torvalds
2017-07-14 7:09 ` Christoph Hellwig
2017-07-14 11:33 ` Anna Schumaker
2017-07-14 14:25 ` Dave Jones
2017-07-14 16:36 ` J. Bruce Fields
2017-07-14 19:05 ` Linus Torvalds
2017-07-14 19:43 ` Andrey Ryabinin
2017-07-14 19:58 ` Linus Torvalds
2017-07-14 20:26 ` Andrey Rybainin
2017-07-14 20:38 ` Daniel Micay
2017-07-14 20:50 ` Linus Torvalds
2017-07-14 21:01 ` Daniel Micay
2017-07-14 21:05 ` Daniel Micay
2017-07-14 20:50 ` Daniel Micay
2017-07-14 23:59 ` Daniel Micay
2017-07-14 19:48 ` Dave Jones
2017-07-16 21:15 ` Dave Jones
2017-07-16 22:57 ` Trond Myklebust
2017-07-17 3:05 ` davej
2017-07-17 19:02 ` Linus Torvalds
2017-07-18 14:20 ` [GIT PULL] Please pull an nfsd bugfix for 4.13 bfields
2017-07-31 15:43 ` [GIT PULL] Please pull NFS client changes for Linux 4.13 davej
2017-08-01 5:35 ` Linus Torvalds
2017-08-01 15:51 ` davej
2017-08-01 17:20 ` Linus Torvalds
2017-08-01 17:30 ` Trond Myklebust
2017-08-01 17:50 ` davej [this message]
2017-08-01 17:58 ` Trond Myklebust
2017-08-01 17:53 ` Linus Torvalds
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