[patch] cifs: update limit for snprintf() in cifs_construct_tcon()

[Dan Carpenter]

In 34c87901e113 "Shrink stack space usage in cifs_construct_tcon" we
change the size of the username name buffer from MAX_USERNAME_SIZE
(256) to 28.  This call to snprintf() needs to be updated as well.

Signed-off-by: Dan Carpenter <error27 at gmail.com>
---
I know that everyone is going to complain about using a literal but
it's local to this function and it's commented in the lines above.
I'm not opposed to using a define, I suppose, if you give me a good
one, but really I'd just as soon leave it as is.  *eye roll in
advance*.

diff --git a/fs/cifs/connect.c b/fs/cifs/connect.c
index 12cf72d..efd1c7a 100644
--- a/fs/cifs/connect.c
+++ b/fs/cifs/connect.c
@@ -3451,7 +3451,7 @@ cifs_construct_tcon(struct cifs_sb_info *cifs_sb, uid_t fsuid)
 		goto out;
 	}
 
-	snprintf(username, MAX_USERNAME_SIZE, "krb50x%x", fsuid);
+	snprintf(username, 28, "krb50x%x", fsuid);
 	vol_info->username = username;
 	vol_info->local_nls = cifs_sb->local_nls;
 	vol_info->linux_uid = fsuid;