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Date:      Tue, 20 Feb 2018 16:34:19 +0000
From:      bugzilla-noreply@freebsd.org
To:        freebsd-fs@FreeBSD.org
Subject:   [Bug 115361] [zfs] "zfs get setuid" doesn't reflect setuid state as set by "zfs mount"
Message-ID:  <bug-115361-3630-YJTRBiXWF7@https.bugs.freebsd.org/bugzilla/>
In-Reply-To: <bug-115361-3630@https.bugs.freebsd.org/bugzilla/>
References:  <bug-115361-3630@https.bugs.freebsd.org/bugzilla/>

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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=3D115361

--- Comment #9 from Alan Somers <asomers@FreeBSD.org> ---
To restate the bug:

"zfs mount -o update,setuid <FILESYSTEM>" works, but "zfs get setuid
<FILESYSTEM>" doesn't reflect the new state of the mount option.  Steps to
reproduce:

$ sudo zpool create foo da1
$ sudo zfs create foo/fs
$ sudo cp -a /sbin/ping /foo/fs
$ zfs get setuid foo/fs
NAME    PROPERTY  VALUE   SOURCE
foo/fs  setuid    on      default
$ mount | grep foo.fs
foo/fs on /foo/fs (zfs, local, nfsv4acls)
$ /foo/fs/ping -c 1 8.8.8.8
PING 8.8.8.8 (8.8.8.8): 56 data bytes
64 bytes from 8.8.8.8: icmp_seq=3D0 ttl=3D55 time=3D3.419 ms

--- 8.8.8.8 ping statistics ---
1 packets transmitted, 1 packets received, 0.0% packet loss
round-trip min/avg/max/stddev =3D 3.419/3.419/3.419/0.000 ms
$ sudo zfs mount -o update,nosetuid foo/fs
$ mount | grep foo.fs
foo/fs on /foo/fs (zfs, local, nosuid, nfsv4acls)
# XXX "zfs get" will return the wrong value
$ zfs get setuid foo/fs
NAME    PROPERTY  VALUE   SOURCE
foo/fs  setuid    on      default
$ /foo/fs/ping -c 1 8.8.8.8
ping: ssend socket: Operation not permitted

In the above transcript, the output of "mount" matches what is expected, as
does the behavior of ping (which requires setuid to run).  Only the output =
of
"zfs get" is wrong.

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