Patch to fix a final regression due to CVE-2007-4572, from Debian
--- samba-3.0.25a/source/smbd/sesssetup.c~	2007-11-27 09:47:02.230607500 -0700
+++ samba-3.0.25a/source/smbd/sesssetup.c	2007-11-27 09:47:02.230607500 -0700
@@ -68,9 +68,9 @@ static int add_signature(char *outbuf, c
 
 	fstr_sprintf( lanman, "Samba %s", SAMBA_VERSION_STRING);
 
-	p += srvstr_push(outbuf, p, "Unix", -1, STR_TERMINATE);
-	p += srvstr_push(outbuf, p, lanman, -1, STR_TERMINATE);
-	p += srvstr_push(outbuf, p, lp_workgroup(), -1, STR_TERMINATE);
+	p += srvstr_push(outbuf, p, "Unix", BUFFER_SIZE - (p - outbuf), STR_TERMINATE);
+	p += srvstr_push(outbuf, p, lanman, BUFFER_SIZE - (p - outbuf), STR_TERMINATE);
+	p += srvstr_push(outbuf, p, lp_workgroup(), BUFFER_SIZE - (p - outbuf), STR_TERMINATE);
 
 	return PTR_DIFF(p, start);
 }