3.16-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Steve French <[email protected]>

commit da80659d4aa758dc6935b10ec64513f0b67bc969 upstream.

We were not checking for symlink support properly for SMB2/SMB3
mounts so could oops when mounted with mfsymlinks when try
to create symlink when mfsymlinks on smb2/smb3 mounts

Signed-off-by: Steve French <[email protected]>
CC: Sachin Prabhu <[email protected]>
Signed-off-by: Greg Kroah-Hartman <[email protected]>

---
 fs/cifs/link.c |    8 ++++++--
 1 file changed, 6 insertions(+), 2 deletions(-)

--- a/fs/cifs/link.c
+++ b/fs/cifs/link.c
@@ -213,8 +213,12 @@ create_mf_symlink(const unsigned int xid
        if (rc)
                goto out;
 
-       rc = tcon->ses->server->ops->create_mf_symlink(xid, tcon, cifs_sb,
-                                       fromName, buf, &bytes_written);
+       if (tcon->ses->server->ops->create_mf_symlink)
+               rc = tcon->ses->server->ops->create_mf_symlink(xid, tcon,
+                                       cifs_sb, fromName, buf, &bytes_written);
+       else
+               rc = -EOPNOTSUPP;
+
        if (rc)
                goto out;
 


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