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authorSteve French <sfrench@us.ibm.com>2009-02-20 08:43:09 +0300
committerSteve French <sfrench@us.ibm.com>2009-02-21 06:37:10 +0300
commiteca6acf91552a9b2e997cc76339115c95eac0217 (patch)
tree2c3c3ef60900d6ee0cb8952f2bd4195abfb92663 /fs/cifs/CHANGES
parentc3b2a0c640bff7df85d79fb4f89674949a267ec2 (diff)
downloadlinux-eca6acf91552a9b2e997cc76339115c95eac0217.tar.xz
[CIFS] Fix multiuser mounts so server does not invalidate earlier security contexts
When two different users mount the same Windows 2003 Server share using CIFS, the first session mounted can be invalidated. Some servers invalidate the first smb session when a second similar user (e.g. two users who get mapped by server to "guest") authenticates an smb session from the same client. By making sure that we set the 2nd and subsequent vc numbers to nonzero values, this ensures that we will not have this problem. Fixes Samba bug 6004, problem description follows: How to reproduce: - configure an "open share" (full permissions to Guest user) on Windows 2003 Server (I couldn't reproduce the problem with Samba server or Windows older than 2003) - mount the share twice with different users who will be authenticated as guest. noacl,noperm,user=john,dir_mode=0700,domain=DOMAIN,rw noacl,noperm,user=jeff,dir_mode=0700,domain=DOMAIN,rw Result: - just the mount point mounted last is accessible: Signed-off-by: Steve French <sfrench@us.ibm.com>
Diffstat (limited to 'fs/cifs/CHANGES')
-rw-r--r--fs/cifs/CHANGES10
1 files changed, 10 insertions, 0 deletions
diff --git a/fs/cifs/CHANGES b/fs/cifs/CHANGES
index 72063f5e56b1..851388fafc73 100644
--- a/fs/cifs/CHANGES
+++ b/fs/cifs/CHANGES
@@ -1,3 +1,13 @@
+Version 1.57
+------------
+Improve support for multiple security contexts to the same server. We
+used to use the same "vcnumber" for all connections which could cause
+the server to treat subsequent connections, especially those that
+are authenticated as guest, as reconnections, invalidating the earlier
+user's smb session. This fix allows cifs to mount multiple times to the
+same server with different userids without risking invalidating earlier
+established security contexts.
+
Version 1.56
------------
Add "forcemandatorylock" mount option to allow user to use mandatory