cifs: a smb2_validate_and_copy_iov failure does not mean the handle is invalid.

It only means that we do not have a valid cached value for the
file_all_info structure.

CC: Stable <stable@vger.kernel.org>
Signed-off-by: Ronnie Sahlberg <lsahlber@redhat.com>
Signed-off-by: Steve French <stfrench@microsoft.com>
Reviewed-by: Pavel Shilovsky <pshilov@microsoft.com>

diff --git a/fs/cifs/smb2ops.c b/fs/cifs/smb2ops.c
index b22be10..00225e6 100644 (file)
--- a/fs/cifs/smb2ops.c
+++ b/fs/cifs/smb2ops.c
@@ -733,14 +733,12 @@ int open_shroot(unsigned int xid, struct cifs_tcon *tcon, struct cifs_fid *pfid)
        qi_rsp = (struct smb2_query_info_rsp *)rsp_iov[1].iov_base;
        if (le32_to_cpu(qi_rsp->OutputBufferLength) < sizeof(struct smb2_file_all_info))
                goto oshr_exit;
-       rc = smb2_validate_and_copy_iov(
+       if (!smb2_validate_and_copy_iov(
                                le16_to_cpu(qi_rsp->OutputBufferOffset),
                                sizeof(struct smb2_file_all_info),
                                &rsp_iov[1], sizeof(struct smb2_file_all_info),
-                               (char *)&tcon->crfid.file_all_info);
-       if (rc)
-               goto oshr_exit;
-       tcon->crfid.file_all_info_is_valid = 1;
+                               (char *)&tcon->crfid.file_all_info))
+               tcon->crfid.file_all_info_is_valid = 1;
 
  oshr_exit:
        mutex_unlock(&tcon->crfid.fid_mutex);