Fwd: [Bug 201869] New: CIFS: block on llistxattr for SMB1

Steve French smfrench at gmail.com
Tue Dec 4 20:23:16 UTC 2018

This is a Samba server bug - see frame 17 of the trace I attached.
The Samba server hung on the level 512 query info (and then hangs
again after the client gives up and reconnects etc.).

---------- Forwarded message ---------
From: <bugzilla-daemon at bugzilla.kernel.org>
Date: Mon, Dec 3, 2018 at 9:36 PM
Subject: [Bug 201869] New: CIFS: block on llistxattr for SMB1
To: <smfrench at gmail.com>


            Bug ID: 201869
           Summary: CIFS:  block on llistxattr for SMB1
           Product: File System
           Version: 2.5
    Kernel Version: 4.20.0-rc4+
          Hardware: All
                OS: Linux
              Tree: Mainline
            Status: NEW
          Severity: high
          Priority: P1
         Component: CIFS
          Assignee: fs_cifs at kernel-bugs.osdl.org
          Reporter: fengxiaoli0714 at gmail.com
        Regression: No

Mount cifs share with vers=1.0,sfu,actimeo=0. And can't return when execute
getfattr a symbol link file.

[root at hp-dl360g9-13 ~]# mount |grep cifs1
//localhost/cifs on /root/cifs type cifs
[root at hp-dl360g9-13 ~]# mkdir ~/cifs/dir
[root at hp-dl360g9-13 ~]# ln -s ~/cifs/dir ~/cifs/dir2
[root at hp-dl360g9-13 ~]# setfattr -h -n user.name ~/cifs/dir2
setfattr: /root/cifs1/dir2: Operation not permitted
[root at hp-dl360g9-13 ~]# getfattr --absolute-names -dh -m user /root/cifs1/dir2

Here can't return.

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