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authorJeff Layton <jlayton@redhat.com>2011-03-14 13:48:08 -0400
committerGreg Kroah-Hartman <gregkh@suse.de>2011-04-22 08:49:56 -0700
commitb3c49263da597fee2e189f00903d53ae7679a09e (patch)
tree0072e523b676754477c73d3873796a0f45b6d779
parentaa7a275fafa66d2510581f0d4fa3e884b061e095 (diff)
downloadlinux-linaro-stable-b3c49263da597fee2e189f00903d53ae7679a09e.tar.gz
cifs: always do is_path_accessible check in cifs_mount
commit 70945643722ffeac779d2529a348f99567fa5c33 upstream. Currently, we skip doing the is_path_accessible check in cifs_mount if there is no prefixpath. I have a report of at least one server however that allows a TREE_CONNECT to a share that has a DFS referral at its root. The reporter in this case was using a UNC that had no prefixpath, so the is_path_accessible check was not triggered and the box later hit a BUG() because we were chasing a DFS referral on the root dentry for the mount. This patch fixes this by removing the check for a zero-length prefixpath. That should make the is_path_accessible check be done in this situation and should allow the client to chase the DFS referral at mount time instead. Reported-and-Tested-by: Yogesh Sharma <ysharma@cymer.com> Signed-off-by: Jeff Layton <jlayton@redhat.com> Signed-off-by: Steve French <sfrench@us.ibm.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
-rw-r--r--fs/cifs/connect.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/fs/cifs/connect.c b/fs/cifs/connect.c
index 2e9e09ca0e30..623b159cff88 100644
--- a/fs/cifs/connect.c
+++ b/fs/cifs/connect.c
@@ -2554,7 +2554,7 @@ try_mount_again:
remote_path_check:
/* check if a whole path (including prepath) is not remote */
- if (!rc && cifs_sb->prepathlen && tcon) {
+ if (!rc && tcon) {
/* build_path_to_root works only when we have a valid tcon */
full_path = cifs_build_path_to_root(cifs_sb);
if (full_path == NULL) {