6: 'B' if a page-release function has found a bad page reference or
some unexpected page flags.
+ 7: 'U' if a user specifically requested that the Tainted flag be set,
+ ' ' otherwise.
+
+ 7: 'U' if a user or user application specifically requested that the
+ Tainted flag be set, ' ' otherwise.
+
The primary reason for the 'Tainted: ' string is to tell kernel
debuggers if this is a clean kernel or if anything unusual has
occurred. Tainting is permanent: even if an offending module is