cifs: fix session setup unicode string saving to use new unicode helpers

...and change decode_unicode_ssetup to be a void function. It never
returns an actual error anyway.

Signed-off-by: Jeff Layton <jlayton@redhat.com>
Acked-by: Suresh Jayaraman <sjayaraman@suse.de>
Signed-off-by: Steve French <sfrench@us.ibm.com>

diff --git a/fs/cifs/sess.c b/fs/cifs/sess.c
index c652c73..93022dc 100644 (file)
--- a/fs/cifs/sess.c
+++ b/fs/cifs/sess.c
@@ -277,12 +277,11 @@ static void ascii_ssetup_strings(char **pbcc_area, struct cifsSesInfo *ses,
        *pbcc_area = bcc_ptr;
 }
 
-static int decode_unicode_ssetup(char **pbcc_area, int bleft,
-                                struct cifsSesInfo *ses,
-                                const struct nls_table *nls_cp)
+static void
+decode_unicode_ssetup(char **pbcc_area, int bleft, struct cifsSesInfo *ses,
+                     const struct nls_table *nls_cp)
 {
-       int rc = 0;
-       int words_left, len;
+       int len;
        char *data = *pbcc_area;
 
        cFYI(1, ("bleft %d", bleft));
@@ -300,63 +299,29 @@ static int decode_unicode_ssetup(char **pbcc_area, int bleft,
                ++bleft;
        }
 
-       words_left = bleft / 2;
-
-       /* save off server operating system */
-       len = UniStrnlen((wchar_t *) data, words_left);
-
-       if (len >= words_left)
-               return rc;
-
        kfree(ses->serverOS);
-       /* UTF-8 string will not grow more than four times as big as UCS-16 */
-       ses->serverOS = kzalloc((4 * len) + 2 /* trailing null */, GFP_KERNEL);
-       if (ses->serverOS != NULL) {
-               cifs_strfromUCS_le(ses->serverOS, (__le16 *)data, len, nls_cp);
-               cFYI(1, ("serverOS=%s", ses->serverOS));
-       }
-       data += 2 * (len + 1);
-       words_left -= len + 1;
-
-       /* save off server network operating system */
-       len = UniStrnlen((wchar_t *) data, words_left);
-
-       if (len >= words_left)
-               return rc;
+       ses->serverOS = cifs_strndup(data, bleft, true, nls_cp);
+       cFYI(1, ("serverOS=%s", ses->serverOS));
+       len = (UniStrnlen((wchar_t *) data, bleft / 2) * 2) + 2;
+       data += len;
+       bleft -= len;
+       if (bleft <= 0)
+               return;
 
        kfree(ses->serverNOS);
-       ses->serverNOS = kzalloc((4 * len) + 2 /* trailing null */, GFP_KERNEL);
-       if (ses->serverNOS != NULL) {
-               cifs_strfromUCS_le(ses->serverNOS, (__le16 *)data, len,
-                                  nls_cp);
-               cFYI(1, ("serverNOS=%s", ses->serverNOS));
-               if (strncmp(ses->serverNOS, "NT LAN Manager 4", 16) == 0) {
-                       cFYI(1, ("NT4 server"));
-                       ses->flags |= CIFS_SES_NT4;
-               }
-       }
-       data += 2 * (len + 1);
-       words_left -= len + 1;
-
-       /* save off server domain */
-       len = UniStrnlen((wchar_t *) data, words_left);
-
-       if (len > words_left)
-               return rc;
+       ses->serverNOS = cifs_strndup(data, bleft, true, nls_cp);
+       cFYI(1, ("serverNOS=%s", ses->serverNOS));
+       len = (UniStrnlen((wchar_t *) data, bleft / 2) * 2) + 2;
+       data += len;
+       bleft -= len;
+       if (bleft <= 0)
+               return;
 
        kfree(ses->serverDomain);
-       ses->serverDomain = kzalloc((4 * len) + 2, GFP_KERNEL);
-       if (ses->serverDomain != NULL) {
-               cifs_strfromUCS_le(ses->serverDomain, (__le16 *)data, len,
-                                  nls_cp);
-               cFYI(1, ("serverDomain=%s", ses->serverDomain));
-       }
-       data += 2 * (len + 1);
-       words_left -= len + 1;
+       ses->serverDomain = cifs_strndup(data, bleft, true, nls_cp);
+       cFYI(1, ("serverDomain=%s", ses->serverDomain));
 
-       cFYI(1, ("words left: %d", words_left));
-
-       return rc;
+       return;
 }
 
 static int decode_ascii_ssetup(char **pbcc_area, int bleft,
@@ -709,8 +674,7 @@ CIFS_SessSetup(unsigned int xid, struct cifsSesInfo *ses, int first_time,
                        ++bcc_ptr;
                        --bytes_remaining;
                }
-               rc = decode_unicode_ssetup(&bcc_ptr, bytes_remaining,
-                                          ses, nls_cp);
+               decode_unicode_ssetup(&bcc_ptr, bytes_remaining, ses, nls_cp);
        } else {
                rc = decode_ascii_ssetup(&bcc_ptr, bytes_remaining,
                                         ses, nls_cp);