linux-kernel - Re: [GIT PULL] Please pull NFS client changes for Linux 4.13

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Date:   Tue, 1 Aug 2017 11:51:31 -0400
From:   "davej@...emonkey.org.uk" <davej@...emonkey.org.uk>
To:     Linus Torvalds <torvalds@...ux-foundation.org>
Cc:     Trond Myklebust <trondmy@...marydata.com>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "bfields@...ldses.org" <bfields@...ldses.org>,
        "linux-nfs@...r.kernel.org" <linux-nfs@...r.kernel.org>,
        "schumaker.anna@...il.com" <schumaker.anna@...il.com>,
        "linux-fsdevel@...r.kernel.org" <linux-fsdevel@...r.kernel.org>
Subject: Re: [GIT PULL] Please pull NFS client changes for Linux 4.13

On Mon, Jul 31, 2017 at 10:35:45PM -0700, Linus Torvalds wrote:
 > On Mon, Jul 31, 2017 at 8:43 AM, davej@...emonkey.org.uk
 > <davej@...emonkey.org.uk> wrote:
 > > Another NFSv4 KASAN splat, this time from rc3.
 > >
 > > BUG: KASAN: use-after-free in nfs4_exchange_id_done+0x3d7/0x8e0 [nfsv4]
 > 
 > Ugh. It's really hard to tell what access that it - KASAN doesn't
 > actually give enough information. There's lots of 8-byte accesses
 > there in that function.
 > 
 > Any chance of getting the output from
 > 
 >    ./scripts/faddr2line vmlinux nfs4_exchange_id_done+0x3d7/0x8e0
 

Hm, that points to this..

7463                 /* Save the EXCHANGE_ID verifier session trunk tests */
7464                 memcpy(clp->cl_confirm.data, cdata->args.verifier->data,
7465                        sizeof(clp->cl_confirm.data));

	Dave