Date: Fri, 15 Dec 2017 07:08:48 -0700 From: Alan Somers <asomers@freebsd.org> To: =?UTF-8?B?R2Vycml0IEvDvGhu?= <gerrit.kuehn@aei.mpg.de> Cc: FreeBSD Net <freebsd-net@freebsd.org> Subject: Re: Fw: 100.chksetuid handging on nfs mounts Message-ID: <CAOtMX2jsQDQ3Csa5qszNMZQbx1cR=EcaPOY15T_QimnkM4%2BCWQ@mail.gmail.com> In-Reply-To: <20171215143456.278a3dc31bb09c9217e83927@aei.mpg.de> References: <20171215143456.278a3dc31bb09c9217e83927@aei.mpg.de>
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On Fri, Dec 15, 2017 at 6:34 AM, Gerrit K=C3=BChn <gerrit.kuehn@aei.mpg.de>
wrote:
> Hello all,
>
> As I got no response at all on freebsd-fs, I try again here...
>
>
>
> Begin forwarded message:
>
> Date: Tue, 5 Dec 2017 09:04:51 +0100
> From: Gerrit K=C3=BChn <gerrit.kuehn@aei.mpg.de>
> To: freebsd-fs@freebsd.org
> Subject: 100.chksetuid handging on nfs mounts
>
>
> Hello all,
>
> I just found that the daily security job on a system here was hanging on
> chksetuid due to a defunct nfs server. Specifically, it turned out that i=
t
> was hanging on this find:
>
> ---
> find -sx / /dev/null -type f \( -perm -u+x -or -perm -g+x -or -perm -o+x
> \) \( -perm -u+s -or -perm -g+s \) -exec ls -liTd \{\} \+
> ---
>
>
> My understanding up to now was that "-x" should prevent find from
> accessing mounted nfs dirs (/ is on local disk, the hanging nfs mounts
> are somewhere under /data/...). Why does the thing still hang, and how ca=
n
> I prevent this?
>
>
> cu
> Gerrit
>
>
This is a known bug. It happens when an NFS filesystem is mounted on the
same mountpoint as a local filesystem. It's fixed by [1] and MFCed by [2]
and [3]. What version are you using?
[1] https://svnweb.freebsd.org/base?view=3Drevision&revision=3D306048
[2] https://svnweb.freebsd.org/base?view=3Drevision&revision=3D306642
[3] https://svnweb.freebsd.org/base?view=3Drevision&revision=3D306644
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